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Callosal disconnection neglect: reassessment after 34 years.

Allison J Good¹, Michele K Harris², Adam D Falchook³

¹a University of Florida College of Medicine , Gainesville , FL , USA.

|November 22, 2016

Summary

This study reexamined a patient 34 years after corpus callosum disconnection. Her callosal disconnection neglect has resolved, with performance now similar to healthy individuals.

Keywords:

Corpus callosum disconnection neglect visuospatial

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Spinal Cord Lateral Hemisection and Asymmetric Behavioral Assessments in Adult Rats

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Published on: March 24, 2020

Area of Science:

Neuroscience
Cognitive Psychology
Neurorehabilitation

Background:

A patient previously exhibited "callosal disconnection neglect" following anterior corpus callosum infarction.
This neglect manifested as significant deviations in line bisection tasks, with greater errors in the contralateral hemispace.

Observation:

The patient was retested 34 years after the initial assessment using visual line-bisection tasks.
Performance was evaluated with lines presented in right, left, and center hemispaces, using either the right or left hand.

Findings:

Current performance showed no significant main effects for hand or spatial position, a marked improvement from prior testing.
The patient's recent performance mirrored that of healthy control groups, indicating resolution of neglect.

Implications:

This case suggests potential recovery from callosal disconnection neglect over long periods.
Possible mechanisms include hemispheric adaptation for ipsilateral spatial attention or learned compensatory strategies.