Lecture 9

3/8/00


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The Split-Brain Syndrome

Commissurotomy procedure:

Commissurotomy procedure

What gets cut?

Specialization along the Corpus Callosum

An MRI of a Split Brain

PPT Slide

PPT Slide

Corpus Callosum

What is connected (via the 200 million + fibers)?

Before and After...

The experimental preparation

Myers & Sperry, 1952

Myers and Sperry (1952)

Human Disconnection Syndrome: Gazzaniga, Bogen & Sperry (1962)

Visual-Verbal Disconnection

The RH Knows What it Cannot Speak

RH can select what it cannot say

A closer look at disconnection

Human Disconnection Syndrome: Gazzaniga, Bogen & Sperry (1962)

Visual-Visual Disconnection

Human Disconnection Syndrome: Gazzaniga, Bogen & Sperry (1962)

Two Minds in One Cranium?

J.W. performs better than “normal” in the mixed condition

Right Hemisphere Spatial Abilities Revealed

Language

Hemispheric Differences in Matching Letters and Locations

Hemispheric Asymmetries on Basic Visual Tasks

Corpus Callosum permits access to specialized processing

Why did previous studies miss these disconnection effects?

Author: Patricia Reuter-Lorenz

Email: parl@umich.edu

Home Page: http://www.umich.edu/~psycours/345

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