Abstract
Drawings by psychiatric patients were studied in various states (i) in depression; (ii) after neuroleptic injection; and (iii) during left hemisphere suppression induced by unilateral electroconvulsive seizure (UES). In these states, right hemisphere activation predominates. The results of the study demonstrate that, under the predominance of right hemisphere activation over the left hemisphere, there is a tendency to reproduce the image of the object and to represent it in near space. Drawings by psychiatric patients were also investigated in (i) the manic state; (ii) after injection of psychotropic drugs which improved the mood; and (iii) during right hemisphere suppression following right-sided UES. Under these conditions, left hemisphere activation predominates and the drawings loose the illusion of three-dimensional space. A tendency to reproduce the knowledge and the ideas of the object and to represent it in distant space was observed. Thus, both hemispheres may represent space and elaborate perceptive and conceptional models of the world in different ways. It is probable that different types of representation are based on global (right-hemispheric) in comparison with focal (left-hemispheric) attention to space.
Highlights
Drawings are one of the methods of neuropsychological examination of patients with organic lesions of the right and left hemispheres
It is suggested that both hemispheres may represent space and elaborate perceptive and conceptional models of the world in different ways
Synthesis of different projections provides evidence of an ability to integrate the various sides of an object from different view points in the process of mentally rotating an object
Summary
Drawings are one of the methods of neuropsychological examination of patients with organic lesions of the right and left hemispheres. The hypothesis suggesting the predominant role of the right hemisphere in incorporating spatial information into drawing performance, leading to disproportion and faulty articulation of parts of the drawing, has been proposed. A method is required to check the drawing abilities of the left hemisphere in conditions when a patient could draw only with the right hand before damage to the left hemisphere occurred. It is obvious that new approaches to investigate drawing abilities of the hemispheres should be developed. In this connection, models of transient suppression of one hemisphere are of interest. It is suggested that both hemispheres may represent space and elaborate perceptive and conceptional models of the world in different ways
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
