Agenesis of the Corpus Callosum: Report of Two Pre‐school Children and Review of the Literature

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Abstract
The results of neuropsychological examinations of 2 patients with agenesis of the corpus callosum showed low intelligence-test performance, impaired visuomotor coordination and impaired bimanual coordination. The most striking deficits were observed in 1 case, particularly in her inability to identify objects verbally when placed in the non-dominant hand, and in her ability to complete a task with the non-dominant hand without vision, when she was unable to complete the same task with vision. This patient is unusual insofar as she manifests deficits noted in acallosal patients, as well as some noted in split-brain patients but not previously ascribed to acallosal patients.