Adult Human Skulls Research Articles

Anatomical study of Foramen Spinosum among adult Human Dry Skulls of Delta State University, Abraka and University of Benin

IntroductionThere is relatively scanty data on the anthropometric study of the foramen spinosum in Nigeria and therefore due to the great surgical and diagnostic importance in procedures like percutaneous trigeminal rizotomy in trigeminal neuralgia and transfacial fine needle aspiration technique.AimThis cross‐sectional study aim to investigate the variation in the right and left length and width of the foramen spinosum.MethodA sample of seventy (70) Adult dry human skulls were investigated in this study. The skulls were obtained from the Department of Human Anatomy and Cell Biology, Delta State University, Abraka, and the Department of Human Anatomy and Cell Biology, University of Benin. The foramen spinosum was observed from the extracranial view of the skull base. The types of foramen spinosum was noted as per the classification given by Anju such as round, oval, irregular and pin‐hole shapes. Anatomic variations of the foramen were also noted. The Oblique measures were recorded for the foramen spinosum, classifying length as anteroposterior diameter and width as transverse diameter using a digital camera.Resultsshowed that majority of the right 57(81.4%) and left 56(80.0%) foramen spinosum were round. The mean value of right and left length of foramen spinosum was 24.01±2.34 and left length of foramen spinosum was 20.10±1.13 respectively and the mean value of right and left width of foramen spinosum was 32.19±1.67 and left width of foramen spinosum was 29.25±1.10 respectively.ConclusionFrom these findings, it can be concluded that the most prevalent shape of foramen spinosum was seen to be round while oval was seen in little percentage with absence of the pin hole shaped foramen spinosum. The right length of foramen spinosum was larger compared to the left length of foramen spinosum and this was statistically significant with p‐value (0.004).Support or Funding InformationNILTable 3, The mean value of right and left length of foramen spinosum was 24.01±2.34 and left length of foramen spinosum was 20.10±1.13 respectively. Table 4, The mean value of right and left width of foramen spinosum was 32.19±1.67 and left width of foramen spinosum was 29.25±1.10 respectively.Table 2 shows the frequency distribution of shapes of left foramen spinosum. Majority of the left foramen spinosum were round, 56(80.0%). Frequency distribution of shapes of right foramen spinosum Right foramen spinosum shape Observed Expected Round 57 81.4 Oval 12 17.1 Irregular 1 1.4 Total 70 100.0 Frequency distribution of shapes of left foramen spinosum Left foramen spinosum shape Observed Expected Round 56 80.0 Oval 12 17.1 Irregular 2 2.9 Total 70 100.0 Descriptive statistics of the right and left length of foramen spinosum Parameters Mean Std. Dev. Min. Stat. Max Stat. Right length of foramen spinosum 24.01 2.34 20.19 28.81 Left length of foramen spinosum 20.10 1.13 17.97 22.55 Descriptive statistics of the light and left width of foramen spinosum Parameters Mean Std. Dev. Min. Stat. Max Stat. Right width of foramen spinosum 32.19 1.67 29.03 34.42 Left width of foramen spinosum 29.25 1.10 25.10 31.91

Full-waveform inversion imaging of the human brain

Magnetic resonance imaging and X-ray computed tomography provide the two principal methods available for imaging the brain at high spatial resolution, but these methods are not easily portable and cannot be applied safely to all patients. Ultrasound imaging is portable and universally safe, but existing modalities cannot image usefully inside the adult human skull. We use in silico simulations to demonstrate that full-waveform inversion, a computational technique originally developed in geophysics, is able to generate accurate three-dimensional images of the brain with sub-millimetre resolution. This approach overcomes the familiar problems of conventional ultrasound neuroimaging by using the following: transcranial ultrasound that is not obscured by strong reflections from the skull, low frequencies that are readily transmitted with good signal-to-noise ratio, an accurate wave equation that properly accounts for the physics of wave propagation, and adaptive waveform inversion that is able to create an accurate model of the skull that then compensates properly for wavefront distortion. Laboratory ultrasound data, using ex vivo human skulls and in vivo transcranial signals, demonstrate that our computational experiments mimic the penetration and signal-to-noise ratios expected in clinical applications. This form of non-invasive neuroimaging has the potential for the rapid diagnosis of stroke and head trauma, and for the provision of routine monitoring of a wide range of neurological conditions.

POST-GLENOID FORAMEN: A RARE EMISSARY FORAMEN IN HUMAN SKULL

Objective: The aim of the present study was to determine the presence of post-glenoid foramen in human skulls.
 Methods: The study was carried out in 100 adult dry human skulls with 200 temporal bones on each side (right and left) which were collected from the Department of Anatomy at RVS Dental College and Hospital, Coimbatore. The selected skulls were placed on a flat table and the considerable foramen was visually identified by two investigators. The foramen was examined by a probing method to find out its patency.
 Results: Of 100 skulls (200 temporal bones), only one skull showed a unilateral post-glenoid foramen on the mandibular fossa of the left side temporal bone (2% of 200).
 Conclusion: The emissary veins are considered as an important encephalic venous drainage that connects the intracranial and extracranial venous pathway through emissary foramen. If there is little variation, and rare occurrence of the emissary foramen may cause serious pathological condition. Thereby, the present study highlights one of the rare emissary foramen, the post-glenoid foramen. This anatomical study of post-glenoid foramen may help the surgeons while operating temporomandibular joint and inner ear malformation to avoid the risk of accidental bleeding during surgery.

Anatomic Analysis of the Internal and External Aspects of the Pterion

The pterion is an H-shaped suture complex. This study's goal was to determine the location of its external and internal surfaces and extension and emphasize and discuss its surgical importance. Fifty dried adult human skulls were obtained from the Department of Anatomy. A 2-mm drill bit was placed externally over the pterion, and the pterion was drilled through the bone perpendicular to the skull's surface. The midpoint of the H shape in the pterion area was not at the same level on the skull's external and internal pterion surfaces. According to these measurements, the external pterion lay above the internal pterion when the skull was viewed externally. Furthermore, the internal pterion was on average longer than the external pterion. The internal and external pterions were schematized such that the skull was viewed from the outside. These areas were divided into 4 quadrants (anterior-superior, anterior-inferior, posterior-superior, and posterior-inferior) by a vertical and horizontal line. In 30 cases (60%), sulci of the middle meningeal artery's parietal branches entered the posterior-superior quadrant on the bone, whereas the artery's frontal branches were located in the anterior-superior and anterior-inferior quadrants, and the Sylvian fissure's origin was in the posterior-inferior quadrant. By using a subdivision into 4 quadrants, and considering our anatomic findings, we determined the way surgical procedures can be performed more easily and reliably. Even with modern localization technologies, anatomic landmarks can be useful to the neurosurgeon.

High resolution transcranial acoustoelectric imaging of current densities from a directional deep brain stimulator

Objective. New innovations in deep brain stimulation (DBS) enable directional current steering—allowing more precise electrical stimulation of the targeted brain structures for Parkinson’s disease, essential tremor and other neurological disorders. While intra-operative navigation through MRI or CT approaches millimeter accuracy for placing the DBS leads, no existing modality provides feedback of the currents as they spread from the contacts through the brain tissue. In this study, we investigate transcranial acoustoelectric imaging (tAEI) as a new modality to non-invasively image and characterize current produced from a directional DBS lead. tAEI uses ultrasound (US) to modulate tissue resistivity to generate detectable voltage signals proportional to the local currents. Approach. An 8-channel directional DBS lead (Infinity 6172ANS, Abbott Inc) was inserted inside three adult human skulls submerged in 0.9% NaCl. A 2.5 MHz linear array delivered US pulses through the transtemporal window and focused near the contacts on the lead, while a custom amplifier and acquisition system recorded the acoustoelectric (AE) interaction used to generate images. Main results. tAEI detected monopolar current with stimulation pulses as short as 100 µs with an SNR ranging from 10–27 dB when using safe US pressure (mechanical indices <0.78) and injected current of ~2 mA peak amplitude. Adjacent contacts were discernable along the length and within each ring of the lead with a mean radial separation between contacts of 2.10 and 1.34 mm, respectively. Significance. These results demonstrate the feasibility of tAEI for high resolution mapping of directional DBS currents using clinically-relevant stimulation parameters. This new modality may improve the accuracy for placing the DBS leads, guide calibration and programming, and monitor long-term performance of DBS for treatment of Parkinson’s disease.

A study of foramen magnum and its clinical relevance

Introduction: Foramen magnum is very important land mark as it is closely related with brainstem and spinal cord. Morphometric parameters of foramen magnum are required for forensic investigations & anthropological identification of unknown individual. As there is paucity of literature regarding variations in size & shape in reference to different races which prompted us for this study. Aims and Objective: The aim was to study the morphology of foramen magnum that can be applied for many invasive surgical as well as diagnostic procedures, which carried out in brain. Materials and Methods: In this cross sectional study, 50 adult human skulls were taken from the department of anatomy. Various parameters of foramen magnum like antero-posterior diameter, transverse diameter along with the measurement of area of dry human adult skull were calculated using vernier caliper to an accuracy of 0.1mm. Mean standard deviation and p value were also calculated. The distribution of shapes into oval, round, tetragonal, irregular, diamond were also assessed visually. Results: The commonest shape found was oval followed by irregular. In this study on 100 sides of 50 dry Skulls the mean Antero-posterior diameter, Transverse diameter are as 34.08 ± 2.25 mm & 28.17 ± 2.85mm. The measurement of area in foramen magnum of dry skull is 757.41±115.09 mm2. This data were then compared and analyzed with the various other studies. Conclusion: The anatomical knowledge of Foramen magnum is of great importance for Neurologist, Radiologist & Anthropologist to achieve the best exposure with appropriate surgical outcome. Keywords: Foramen magnum, Skull, Anatomical variations, Morphometric analysis.

Study of metopic suture in adult human skulls of Marathwada region

Study of metopic suture in adult human skulls of Marathwada region

A study on differences in the obliteration of cranial sutures and their clinical significance

Introduction: There are very few studies on the patency of cranial sutures, and this study analyzes the difference in sutural patency. The objective was to study the difference in the patency of coronal, sagittal, and lambdoid sutures in Indian human adult skulls. Material and Methods: This study involved 120 Indian human adult skulls. The suture patency was graded in accordance to a classification proposed by Sabini and Elkowitz on a scale of 0–4. An open suture was classified as 0; fused but not obliterated as 1; and Grades 2, 3, and 4 represented 50%, and 100% of obliteration, respectively. Results: The lambdoid sutures were observed to be the most patent and least obliterated. Grade 1 sutures were observed to be 44.71% in lambdoid, 8.4% in sagittal, and 7.3% in coronal sutures. Grade 2 sutures were observed to be 42.6% in lambdoid, 49.3% in sagittal, and 46.7% in coronal sutures. Grade 3 sutures were observed to be 10.1% in lambdoid, 32.1% in sagittal, and 36.2% in coronal sutures. Grade 4 sutures were observed to be 2.6% in lambdoid, 10.2% in sagittal, and 9.8% in coronal sutures. No open sutures were observed. Discussion and Conclusion: Lambdoid sutures are more patent than coronal and sagittal sutures. This can be attributed to the presence of more muscular contractile forces acting on the lambdoid suture when compared with other sutures. The mechanisms involved in suture closure are complex and involve genetic and environmental factors, age, and tissue interactions. Therefore, more advanced research is essential for a clearer insight on this subject, which has immense clinical implications in neuroscience.

English

English

Morphometric and Anatomic Variations of Foramen Ovale in Human Skull and Its Clinical Importance.

Objective:There is a paucity of information regarding the specific anatomy and clinical significance of variations of foramen ovale (FO). The present study was undertaken to define this anatomy in more detail and to review the literature regarding these anatomic variations.Materials and Methods:A total of 124 adult human dry skulls were analyzed for the variations in appearance and number of FO being noted. The length and width of the FO of both sides were determined using digital vernier calipers and area (A) was also calculated and analyzed.Results:Of 82 adult skulls, the values for the right side was 7.64 ± 1.194 mm, 5.128 ± 0.827 mm, and 30.808 ± 7.545 mm2 and for the left side the values was 7.561 ± 1.123 mm, 5.244 ± 0.950 mm, and 31.310 ± 8.262 mm2, respectively, for the mean length, width, and area of the FO. The shape of foramen was typically ovale in most of the skulls (56.70%) with some bony variations such as spine, tubercles, bony bridge/bar, and confluence.Conclusion:Such variants in the FO could interfere with transcutaneous needle placement into the FO or distort anatomic relationships during approaches to the cranial base.

Asterion localization - variability of the location for surgical and anthropological relevance.

This work aimed to study the variability in location of the asterion in a Polish population, which may be important for both surgical and anthropological procedures. In surgical approaches to the posterior cranial fossa, the asterion is of great importance as a reference landmark. Its accurate localization may be impeded by the presence of additional, irregular sutural bones. Dry adult human skulls (n = 113, 60.2% male and 39.8% female) were analyzed for asterion location in relation to the reference points (mastoidale, bregma, porion, inion, lambda, opisthion). The asterion exhibits wide variation in location. The range of ± 2 SD of measured distances demonstrated broad variation intra and interindividually (15.9-27.8 mm for male skulls and 13.1-24.6 mm for female skulls). Distances from the asterion to the reference landmarks were longer for males compared to females (p < 0.05), and some distances were longer for people of lower socioeconomic status. Because of its lesser variation, measurements to three reference landmarks (mastoidale, bregma and frontotemporale) may be particularly important for surgical purposes. Defining accurately the safe area for asterion is important but problematic. Because of the complex relations between bony landmarks, preoperative imaging assistance is required, and the asterion should only be used as auxiliary, not as a key superficial cranial landmark in surgical interventions.

Macrophage Transplantation Fails to Improve Repair of Critical-Sized Calvarial Defects.

Over 500,000 bone grafting procedures are performed every year in the United States for neoplastic and traumatic lesions of the craniofacial skeleton, costing $585 million in medical care. Current bone grafting procedures are limited, and full-thickness critical-sized defects (CSDs) of the adult human skull thus pose a substantial reconstructive challenge for the craniofacial surgeon. Cell-based strategies have been shown to safely and efficaciously accelerate the rate of bone formation in CSDs in animals. The authors recently demonstrated that supraphysiological transplantation of macrophages seeded in pullalan-collagen composite hydrogels significantly accelerated wound healing in wild type and diabetic mice, an effect mediated in part by enhancing angiogenesis. In this study, the authors investigated the bone healing effects of macrophage transplantation into CSDs of mice. CD1 athymic nude mice (60 days of age) were anesthetized, and unilateral full-thickness critical-sized (4 mm in diameter) cranial defects were created in the right parietal bone, avoiding cranial sutures. Macrophages were isolated from FVB-L2G mice and seeded onto hydroxyapatite-poly (lactic-co-glycolic acid) (HA-PLGA) scaffolds (1.0 × 10 cells per CSD). Scaffolds were incubated for 24 hours before they were placed into the CSDs. Macrophage survival was assessed using three-dimensional in vivo imaging system (3D IVIS)/micro-CT. Micro-CT at 0, 2, 4, 6, and 8 weeks was performed to evaluate gross bone formation, which was quantified using Adobe Photoshop. Microscopic evidence of bone regeneration was assessed at 8 weeks by histology. Bone formation and macrophage survival were compared at each time point using independent samples t tests. Transplantation of macrophages at supraphysiological concentration had no effect on the formation of bones in CSDs as assessed by either micro-CT data at any time point analyzed (all P > 0.05). These results were corroborated by histology. 3D IVIS/micro-CT demonstrated survival of macrophages through 8 weeks. Supraphysiologic delivery of macrophages to CSDs of mice had no effect on bone formation despite survival of transplanted macrophages through to 8 weeks posttransplantation. Further research into the physiological effects of macrophages on bone regeneration is needed to assess whether recapitulation of these conditions in macrophage-based therapy can promote the healing of large cranial defects.

Morphometric and morphologic study of Foramen Ovale in In Indian population

Background:The floor of middle cranial fossa shows several foramina through which vital neural and vascular structures pass. Thus, the knowledge of normal and variant anatomy of these foramina is important. One such foramen is Foramen ovale which allows the passage of certain important structures.&#x0D; Aims and Objective:This study also aimed to provide a base line data to neurosurgeons for easy and safe approach to middle cranial fossa. Thus, to fulfill the above, the morphometric and morphologic characteristics of the foramenovalewere studied and the observed metric and non-metric parameters were compared with those of previous studies.&#x0D; Materials and Methods:The study has been conducted on 160 adult non-pathological dry human skulls of unknown age and sex. Those parts of broken skulls were included in the study in which the area of Foramen ovale was intact. All the parameters were obtained by one observer only to avoid inter-observer error. The foramen ovale was identified and different metric and non-metric parameters were observed and measured.&#x0D; Results:The most common shape on both sides was noted to be transversely oval. Out of 160 skulls, 2 skulls (1.25%) showed accessory FO bilaterally. 4 skulls showed divided FO on left side. Out of 4, 2 skulls( 1.25%) were noted to have bony bar and in 2 skulls (1.25%) the main FO were divided by bony plate.&#x0D; Conclusion: The morphologic variations of Foramen Ovale in the form of accessory foramen and presence of bony bar / bony plate are common. This study will provide a baseline data as well as frequency of related variations in our population for a safer approach by the surgeons.

Morphometric Study of Jugular Foramen and Jugular Fossa of Dried Adult Human Skulls and Its Clinical Significance

Abstract Introduction Jugular foramen is one of the most fascinating foramina of the human skull. It is a complex, irregular bony canal located between the occipital bone and petrous part of the temporal bone. Many important structures, like 9th, 10th, 11th cranial nerves, meningeal branch of occipital and ascending pharyngeal arteries, internal jugular vein, and inferior petrosal sinus, are passing through it. The jugular fossa has a septum and a dome. The septum divides the foramen into two compartments: anteromedial compartment (pars nervosa) and posterolateral compartment (pars vascularis). The dome contains superior bulb of internal jugular vein. The architecture of the foramen varies in size, shape, and laterality besides differences related to sex and race. The morphometric measurements of jugular foramen are very important for neurosurgeries and head and neck surgeries. Objectives The aim of the present study is to study the morphology of jugular foramen along with its dimensions, compartments, presence of partial or complete septa and dome. Materials and Methods A total number of 60 jugular foramina were examined from 30 adult dry human skulls of unknown age and sex from the Department of Anatomy, PSG Institute of Medical Sciences and Research, Coimbatore. Measurements were taken using Digital Vernier calipers. Results were analyzed statistically. Results The length, width, and surface area of jugular foramen of right side were measured and compared with the left side. Length and width of the jugular foramen was significantly higher on the right side. The presence of partial septum was found in 27 skulls (90%) on the right side and 29 skulls (99.7%) on the left side, respectively. Dome was present in 100% of the jugular foramina on the right side and 90% of the jugular foramina on the left side. Separate opening for inferior petrosal sinus was found in eight skulls (27%) on the right side and four skulls (13%) on the left side. Conclusion This study provides a clear understanding of anatomy of jugular foramen and supports the reported morphometric variations. The morphometric variations of jugular foramen in the parameters of the skull are probably due to ethnic and racial factors. Knowledge of these variations is important for neurosurgeons and radiologists who deal with space occupying lesions of the structures surrounding jugular foramen. This study may be helpful for ENT surgeons while performing middle ear surgeries.

SEX DETERMINATION BY MEASURING LENGTH AND BREADTH OF FORAMEN MAGNUM AT COMPUTED TOMOGRAPHIC IMAGES OF SKULL

Abstract Background: Identification of human skeletal remains is of major importance in medico-legal situations such as criminal cases, mass disasters and human rights abuse investigations. Sex can be established by gross examination of skeleton using metric and morphological techniques. Sexing the skeleton which is intact and entire is certainly easier and reliable with high accuracy as against done with only a part of the skeleton. A sexing accuracy of 90–95% from whole skeleton, pelvis, or one hip bone and 80% accuracy from skull alone. The occipital bone remains well protected and well preserved structure by huge volume of soft tissues, this makes occipital bone useful in the sex determination. Aim of the study: To document and analyze the foramen magnum and to investigate its reliability in sex prediction at computed tomographic images of adult human skull. Methods: This study was carried on 100 Computed Tomographic images of the skull of adult persons (50 males and 50 females). The length and breadth of foramen magnum were measured. Results: There is significant difference between the length of foramen magnum in males and females (pv = 0.00) and there is significant difference between the breadth of foramen magnum in males and females (pv=0.00) and there is no significant difference between different ages after puberty. Conclusion: There is statistically significant expression of sexual difference in the foramen magnum dimensions, which may prove useful and reliable in predicting sex in partial remains by discriminant function analysis when other methods tend to be inconclusive

A study on Goethe’s ossicles in adult human skulls

A study on Goethe’s ossicles in adult human skulls

Anatomical and Radiological Study of Jugular Foramen

Abstract Background and Aim The purpose of present study was to obtain comprehensive data of morphometric and anatomical details of jugular foramen. Materials and Methods The study was performed on 30 dry adult human skulls along with computed tomography (CT) scans from 30 adult patients. The parameters observed were dimensions, shape, margins, confluence, septations, and distance from jugular foramen to mastoid base. Result In the dry skull observations, only anteroposterior diameter (APD) was significantly different between the right and left side, while for the CT scan observations both transverse diameter and APD exhibit significant difference. Conclusion We believe that data from the present study will help radiologists and neurosurgeons for diagnosis and treatment of skull base pathology around jugular foramen.

Comprehensive anatomy of the foramen ovale critical to percutaneous stereotactic radiofrequency rhizotomy: cadaveric study of dry skulls.

Percutaneous stereotactic radiofrequency rhizotomy (PSR) is often used to treat trigeminal neuralgia, a serious condition that results in lancinating, episodic facial pain. Thorough understanding of the microsurgical anatomy of the foramen ovale (FO) and its surrounding structures is required for efficient, effective, and safe use of this technique. This morphometric study compares anatomical and surgical orientations to identify the variations of the FO and assess cannulation difficulty. Bilateral foramina from 174 adult human dry skulls (348 foramina) were analyzed using anatomical and surgical orientations in photographs from standardized projections. Measurements were obtained for shape, size, adjacent structures, and morphometric variability effect on cannulation. The risk of potential injury to surrounding structures was also assessed. The authors identified 6 distinctive shapes of the FO and 5 anomalous variants from the anatomical view, and 6 shapes from the surgical view. In measurements of surface area of this foramen obtained using the surgical view, loss (average 18.5% ± 5.7%) was significant compared with the anatomical view. Morphometrically, foramen size varied significantly and obstruction from a calcified pterygoalar ligament occurred in 7.8% of specimens. Importantly, 8% of foramina were difficult to cannulate, thus posing a 12% risk of inadvertent cannulation of the foramen lacerum. Significant variability in the FO's shape and size probably affected its safe and effective cannulation. Preoperative imaging by 3D head CT may be helpful in predicting ease of cannulation and in guiding treatment decisions, such as a percutaneous approach over microvascular decompression or radiosurgery.

Influence of the mesostructure on the compressive mechanical response of adolescent porcine cranial bone

The Göttingen minipig has been used as a surrogate in impact experiments designed to better understand the mechanisms by which mechanical loading induces traumatic brain injury (TBI). However, the relationship between mechanical response and structural morphology of the minipig cranium must be understood relative to the human skull in order to accurately scale any quantitative results, such as injury thresholds, from non-human TBI experiments to the human anatomy. In this study, bone specimens were dissected from the crania of adolescent Göttingen minipigs. These specimens were small cubes that contained the entire thickness of the skull. The microstructure of these skull specimens was quantified at the micron-length scale using micro-computed tomography (micro-CT). The skull was found to be highly porous near the skin-side surface and became less porous nearer the brain-side surface. The skull specimens were then loaded in quasi-static compression to obtain their mechanical response. The surface strain distribution on the specimen face was measured during loading using digital image correlation (DIC). The 2-D strain field formed a gradient of iso-strain bands along the thickness (depth) dimension from the skin-most to brain-most sides of the skull. The variation of the minipig microstructure along the thickness differed significantly from that of the adult human skull; thus the mechanical load transmission through the minipig skull is expected to be quite different from that of the human skull. The objective was to develop the methodology of relating the microstructure, as quantified by the bone volume fraction (BVF), to the mechanical response. The specimen was modeled by discretizing the depth dimension into a series of layers, which enabled the calibration of a power law relating the depth-dependent BVF to the depth-varying modulus. The relationship was used to predict moduli values for the adolescent minipig skull to provide updated, biofidelic parameters for finite element simulations at varying levels of complexity. Moreover, the methodology outlined in this paper can be applied to other skulls with different structural variations, such as the human.

Groove for the Sphenoparietal Sinus: A Constant Cranial Structure in Human Gross Anatomy

ObjectivesCranial venous sinuses are elements formed by dura mater, they are fixed in bony parts leaving their tracks as grooves, which can be used as recognition in morphological studies. One of these grooves, the sphenoparietal sinus groove, is not referenced in Terminologia Anatomica, so the objective is to demonstrate the existence in human skulls.MethodsSixty five human adult skulls were selected, without distinction of ethnic group or sex, in order to evaluate the existence of a bony groove for the sphenoparietal sinus. As inclusion criteria, the skulls had to have integral the anterior region of the middle cranial fossa. To establish the existence of the groove, under the lesser wing of the sphenoid was visualized and palpated endocranially.ResultsOf the 65 skulls, 63 had a bony groove related to the sphenoparietal sinus (96,92%); of these, 50 presented bilaterally (76,92%) and 13 unilaterally: 9 in the left region (13,84%) and 4 in the right (6,15%); two skull did not present the groove (3.08%).ConclusionIn Terminologia Anatomica, the groove for the sphenoparietal sinus is not described, a constant structure due to its high percentage of presence (96,92%), for which the term “groove for the sphenoparietal sinus” is proposed, which can serve as a landmark in cranial morphology.This abstract is from the Experimental Biology 2019 Meeting. There is no full text article associated with this abstract published in The FASEB Journal.