Is interhemispheric transfer time related to age? A developmental study

Daniela Brizzolara, Giovanni Ferretti, Paola Brovedani, Claudia Casalini, Barbara Sbrana

Research output: Contribution to journalArticlepeer-review

Abstract

In simple visuomotor reaction time tasks, the difference between reaction time (RT) in the uncrossed hand/hemifield condition from RT in the crossed hand/hemifield, known as CUD (crossed-uncrossed difference), has been interpreted as reflecting interhemispheric transmission time (IHTT). Several studies in normal adults have found a CUD of a few milliseconds (3-4), while an abnormally long CUD has been reported in patients who underwent a surgical section of the corpus callosum or in congential acallosal subjects. The corpus callosum, which is the most important structure for interhemispheric transfer of information, completes its myelination approximately by age ten. It has been hypothesized that the functional maturity of the corpus callosum concides with the termination of the myelination cycle. No developmental study has focused on the development of IHTT, in relation to callosal maturation. The purpose of our study has been to investigate the development of interhemispheric transfer of visuomotor information in children aged seven to eleven, using a simple RT task with lateralized visual stimuli. The results indicate an age-related decrease of CUD, which we interpret as reflecting the maturation of the corpus callosum during childhood years.

Original languageEnglish
Pages (from-to)179-184
Number of pages6
JournalBehavioural Brain Research
Volume64
Issue number1-2
DOIs
Publication statusPublished - Oct 20 1994

Keywords

  • Child
  • Corpus callosum
  • Interhemispheric transmission time
  • Visuomotor reaction time

ASJC Scopus subject areas

  • Behavioral Neuroscience

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