Interhemispheric transfer time in a patient with a partial lesion of the corpus callosum

Neuroreport. 2001 May 25;12(7):1469-72. doi: 10.1097/00001756-200105250-00035.


The interhemispheric transfer time (ITT) of basic visuo-motor integration was investigated in a patient who had a lesion of the corpus callosum that spared the splenium and rostrum. Overall, 4291 simple reaction times were collected during unimanual responses to tachistoscopically presented lateralized simple visual stimuli at 4 degrees, 6 degrees and 10 degrees. Despite retaining some abilities that typically require the integration of information between hemispheres (e.g. haptic naming, tachistoscopic lateralized consonant reading) the patient performed similarly to completely callosotomized patients in a basic visuo-motor ITT task (overall 25.5 ms) at any eccentricity. These findings suggest that specific callosal channels mediate the basic visuo-motor ITT and these do not include the rostrum and/or the splenium of the corpus callosum.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Brain Injuries / pathology
  • Brain Injuries / physiopathology*
  • Cerebral Cortex / physiopathology*
  • Corpus Callosum / injuries
  • Corpus Callosum / pathology
  • Corpus Callosum / physiopathology*
  • Functional Laterality / physiology*
  • Humans
  • Infarction, Anterior Cerebral Artery / pathology
  • Infarction, Anterior Cerebral Artery / physiopathology
  • Magnetic Resonance Imaging
  • Male
  • Middle Aged
  • Neuropsychological Tests
  • Perceptual Disorders / etiology
  • Perceptual Disorders / pathology
  • Perceptual Disorders / physiopathology
  • Psychomotor Performance / physiology*
  • Reaction Time / physiology*
  • Visual Cortex / physiopathology
  • Visual Pathways / injuries
  • Visual Pathways / pathology
  • Visual Pathways / physiopathology