Crossed Aphasia Research Articles

Incidence and Symptomatology of Vascular Crossed Aphasia in Bengali.

Crossed aphasia (CA) refers to aphasia following a right-hemispheric lesion in right-handed individuals. It has been suggested that the prevalence of CA differs with language, although its worldwide incidence, as reported by most studies, is less than 3%. To find the incidence of CA in the Bengali language. From 2016 to 2018, in a hospital located in a Bengali-speaking area of eastern India, 515 cases of first-ever stroke were documented, out of which 208 patients presented with aphasia (40.38%) according to their scores on the Bengali version of the Western Aphasia Battery. Among the patients with aphasia, 14 (6.73%; 8 men and 6 women) presented with CA. Of these, 10 were diagnosed with Broca aphasia and four with transcortical motor aphasia. No patient presented with Wernicke aphasia. The relatively high incidence of CA in our study suggests that bi-hemispheric language representation may be more prevalent in Bengali speakers than in speakers of other languages. The absence of crossed Wernicke aphasia in our study participants may represent a left-hemispheric advantage for receptive language abilities in Bengali speakers. Further studies are required to clarify whether idiosyncrasies in the Bengali language may be responsible for the differential brain representation of language seen in our study participants.

Diagnosis of crossed aphasia, a case report

The purpose was to back up on all the arguments [1] , for to diagnose crossed aphasia (CA) our patient and improve rehabilitation. A man of 45 years, right-handed, presented a dysarthria accompanied by a loss of verbal fluency, lack of word and paraphasias, after a parietal-temporal hematoma in right hemisphere. The interrogatory did not find a familial history on a left handedness. Brain imaging confirmed the integrity of the left hemisphere in the initial MRI and CT scan. The speech therapist assessment showed the oral picture naming test alack of the word (61/80, decreased lexical background, non-response, breaks) and semantic paraphasias. The questionnaire of the Boston Diagnostic Aphasia Examination of the repetition of sentences showed an effect of length and omissions of words. Reading words and sentences aloud contained substitutions, additions and paralexies. Listening was average (11/15: order execution, 6/12: understanding sentences and texts). Reading comprehension was average, 6/10. The writing contained many errors (perseveration, paragraphies literal and neologisms). The copy was altered. Automatic series were not preserved (Transcript of the alphabet). Brain lateralization test found an ocular dominance right and right lower limb (20/20). Neuropsychological assessment found disorders of attention (Stroop and Trail Making Test [TMT] with 4.12 standard deviation [sd] and the corrected T score 1.9 and 2.4 sd) and mental flexibility (TMT: 3.41 sd). An impaired working memory (WAIS: span = 7 and to place = 3) and logical reasoning (WAIS-III: 5). A deficit in verbal episodic memory (learning the verbal list of BEM 144: 1.31 sd) affect the encoding and retrieval processes. We have thus confirmed the diagnosis of crossed aphasia by eliminating a left handedness and a lesion in the left hemisphere. The speech therapist and neuropsychological allowed to assert the diagnosis of aphasia associated with cognitive disorders [2] . Therefore we associated the language rehabilitation in a targeted program on cognitive function and gained better results.

Crossed Dysgraphia: A case Report

Crossed Dysgraphia: A case Report

Neural Substrate Responsible for Crossed Aphasia

Crossed aphasia (CA) refers to language impairment secondary to right hemisphere lesion. Imaging analysis on the lesion location of CA has not yet been reported in the literature. This study was proposed to analyze the most prevalent lesion site related to CA. Brain MRI of 7 stroke patients satisfying the criteria for CA were used to define Region of interest (ROIs) before overlaying the images to visualize the most overlapped area. Talairach coordinates for the most overlapped areas were converted to corresponding anatomical regions. Anatomical lesions where more than 3 patients' images were overlapped were considered significant. The overlayed ROIs of 7 patients revealed the lentiform nucleus as the most frequently involved area, overlapping in 6 patients. Our study first demonstrates the areas involved in CA by lesion mapping using brain MRI, and lentiform nucleus is the responsible neural substrate for crossed aphasia.

Poster 371: Functional Recovery Following Stroke With Crossed Aphasia: A Case-Matched Controlled Study

Poster 371: Functional Recovery Following Stroke With Crossed Aphasia: A Case-Matched Controlled Study

Crossed Wernicke’s aphasia: A case report

Crossed aphasia is a phenomenon in which an individual sustains a lesion in the right hemisphere (typically non-language dominant), but who exhibits an aphasic syndrome. The authors present a case study of an individual with crossed aphasia (CA) in an attempt to provide anecdotal information for four questions posed by Pita, Karavelis, and Foroglou (1997): (a) Is CA a reversal of the normal cerebral hemisphere pattern of language function? (b) Does the presence of aphasia following a right cerebral hemisphere lesion indicate that typical right hemisphere functions (e.g., visual perception) are intact? (c) How may the aphasia’s presentation differ from typical left hemisphere aphasias? And (d) is the pattern of improvement following CA similar to that of typical left hemisphere aphasias? We longitudinally examined the communicative-cognitive performance of an adult man with crossed aphasia of the Wernicke’s type following a cerebrovascular accident. A 21-week follow-up evaluation indicated improvements in his language functioning from our initial evaluation, but he continued to exhibit a classic, moderately severe Wernicke’s aphasia.

Crossed aphasia: An analysis of the symptoms, their frequency, and a comparison with left-hemisphere aphasia symptomatology

This study presents a thorough analysis of published crossed aphasia (CA) cases, including for the first time the cases published in Japanese. The frequency of specific symptoms was determined, and symptomatology differences based on gender, familial sinistrality, and CA subtype were investigated. Results suggested that the CA population is comparable to the left-hemisphere patient population. However, male were significantly more likely than female CA subjects to show a positive history of familial sinistrality. Typical right-hemisphere (i.e., nonlanguage-dominant) symptoms were frequent but rarely carefully reported or assessed. Results are compared with previous CA reviews and left-hemisphere aphasia. Suggestions for a more systematic assessment of the CA symptomatology are presented.

The history of crossed aphasia: confluence of concepts

In 1899, Byrom Bramwell introduced the concept of crossed aphasia (CA) as a deviation from the prevailing insight of an inherent association between cerebral dominance for language and hand preference. He defined as such the phenomenon of aphasia caused by brain damage ipsilateral to the dominant hand (i.e. aphasia resulting from a lesion to the left hemisphere in sinistrals and aphasia following a lesion to the right hemisphere in dextrals). Notable in the development of the concept of CA is the absence of any reference to the understanding of acquired childhood aphasia (ACA) in which aphasia following a right hemisphere lesion was considered a frequent phenomenon. Following an erosion of Bramwell's positions on CA and the decay of the feasibility of so-called Broca's doctrine, a confluence of concepts was established between CA and ACA seven decades later. This paper reviews the history of the collusion of concepts of acquired aphasia in these atypical populations.

The history of crossed aphasia: early development of concepts and hypotheses

As an exception to so-called Broca's doctrine, assigning left-hemisphere dominance for language to dextrals and right-hemisphere dominance for language to sinistrals, Byrom Bramwell introduced, more than a century ago, the term crossed aphasia (CA) to denote the exceptional condition in which an aphasic syndrome results from a cerebral lesion ipsilateral to the dominant hand. Bramwell assumed that, in contrast to temporary manifestations, persistent CA is rare and essentially limited to the sinistral population. During the next decades, however, this view was challenged by several studies that reported persistent CA in dextrals (CAD). The initial concept of CA further eroded when studies on aphasia in sinistrals showed that CA is the rule and not the exception in this population. This paper reviews the early development and erosion of concepts in CA.

Crossed Anomic Aphasia: Mild Naming Deficits Following Right Brain Damage in a Dextral Patient

A detailed case study is reported of crossed aphasia (CA) in a dextral patient, bearing upon such controversial issues as intrahemispheric localisation of language function and hemispheric reversal of nonverbal function. DA, a man aged 37, developed a mild naming problem due to right temporal lobe haematoma. Apart from a mild acquired stutter, his continuous speech was fluent and had a normal proportion of open to closed class lexical items. His naming deficit appears to originate in the ‘blocking’ or ‘disconnection’ of the phonological lexicon: he could usually give a functional definition of un-named items and retrieve them with the help of a phonemic cue. Lexical retrieval appears his only language deficit, as he had no comprehension or phonological discrimination deficits. DA showed no visuo-spatial or auditory-nonverbal deficits, suggesting the complete reversal of hemispheric specialisation.