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Related Experiment Videos

Two brains, one clock.

Carlo A Marzi1

  • 1Department of Neurological and Vision Sciences, University of Verona, 8 Strada Le Grazie, 37134 Verona, Italy. carloalberto.marzi@univr.it

Trends in Cognitive Sciences
|December 31, 2003
PubMed
Summary
This summary is machine-generated.

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Information on brief time durations is shared between brain hemispheres, even when the corpus callosum is severed. This suggests a subcortical internal clock accessible to both sides of the brain.

Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • The corpus callosum facilitates interhemispheric communication.
  • Understanding the neural basis of time perception is crucial for cognitive neuroscience.

Purpose of the Study:

  • To investigate the location and accessibility of the brain's internal clock for time duration.
  • To determine if interhemispheric transfer of time information is possible without the corpus callosum.

Main Methods:

  • Case study of a patient with a sectioned corpus callosum and forebrain commissures.
  • Assessment of the patient's ability to share information about perceived time durations between cerebral hemispheres.

Main Results:

  • The patient could readily share information about brief time interval durations between cerebral hemispheres.

Related Experiment Videos

  • This interhemispheric transfer occurred despite the absence of major forebrain commissures.

    • Conclusions:

    • The internal clock responsible for measuring time duration is likely located subcortically.
    • Subcortical pathways can effectively project timing information to both cerebral hemispheres.