Scanning your body is different from performing body movements: A double dissociation between body representational neglect and apraxia

Body representational neglect (BRN) and apraxia can be found after left hemisphere (LH) lesions. Additionally, both disorders recruit knowledge about certain body parts, their position in space, and their spatial relationship to each other. Hence, the present study examined whether BRN and apraxia c...

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Bibliographic Details
Published in:Neuropsychologia 2009-03, Vol.47 (4), p.1187-1192
Main Authors: Groh-Bordin, Christian, Glocker, Daniela, Bittl, Petra, Keller, Ingo, Preger, Rudolf, Hildebrandt, Helmut, Kerkhoff, Georg
Format: Article
Language:English
Subjects:
Adult
Adult and adolescent clinical studies
Aged
Apraxia
Apraxias - pathology
Apraxias - physiopathology
Biological and medical sciences
Body Image
Body representational neglect
Brain Injuries - pathology
Brain Injuries - physiopathology
Brain Mapping
Disorders of higher nervous function. Focal brain diseases. Central vestibular syndrome and deafness. Brain stem syndromes
Female
Functional Laterality - physiology
Gestures
Humans
Imitation of meaningless gestures
Lesion location
Magnetic Resonance Imaging - methods
Male
Medical sciences
Middle Aged
Movement - physiology
Neglect
Nervous system (semeiology, syndromes)
Neurology
Neuropsychological Tests
Organic mental disorders. Neuropsychology
Perceptual Disorders - pathology
Perceptual Disorders - physiopathology
Psychology. Psychoanalysis. Psychiatry
Psychometrics
Psychopathology. Psychiatry
Vest test
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Summary:Body representational neglect (BRN) and apraxia can be found after left hemisphere (LH) lesions. Additionally, both disorders recruit knowledge about certain body parts, their position in space, and their spatial relationship to each other. Hence, the present study examined whether BRN and apraxia can be functionally dissociated at the behavioral and neural level. 23 LH lesioned patients were examined with a standardized body neglect test (Vest test) and a standardized test of apraxia (imitation of meaningless gestures). At the behavioral level BRN and apraxia showed a double dissociation. Moreover, these deficits were associated with specific brain lesions: while BRN was related to lesions in Brodmann areas 6 and 44 and frontal white matter, apraxia was linked to lesions in the superior longitudinal fasciculus and parietal and central white matter. The results are discussed as indicating dissociable representations of the human body within the left cerebral hemisphere.
ISSN:0028-3932
1873-3514
DOI:10.1016/j.neuropsychologia.2008.11.018