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  • Title: Visuospatial functioning before and after commissurotomy. Disconnection in hierarchical processing.
    Author: Delis DC, Kramer JH, Kiefner MG.
    Journal: Arch Neurol; 1988 Apr; 45(4):462-5. PubMed ID: 3355403.
    Abstract:
    A patient who underwent complete cerebral commissurotomy was tested before and after surgery on tasks involving drawing and recognition memory for visual hierarchical stimuli. These stimuli consisted of a large, higher-level form constructed from smaller, lower-level forms. Postoperatively, the patient was more accurate in drawing and recognizing higher-level forms relative to lower-level forms when responding with his left hand and primarily right hemisphere, whereas he showed the opposite pattern when responding with his right hand and primarily left hemisphere. Implications of these findings for theories of the cerebral organization of visuospatial processing are discussed.
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