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J Pediatr Rehabil Med. 2013;6(3):129-45. doi: 10.3233/PRM-130249.

Evidence from unilateral lesions of early uncompensable implementation of opposed response-biases in each hemisphere of the brain.

Author information

1
Département de Psychologie, Université du Québec à Montréal, Montréal, QC, Canada.

Abstract

PURPOSE:

The intact right hemisphere presents an omissive response-bias and the left hemisphere a commissive response-bias in adults. This research sought to determine whether these hemispherically lateralized response-biases manifest early developmental and uncompensable brain implementation.

METHODS:

Sixteen teenager and adult participants with focal left hemisphere lesions and fourteen with focal right hemisphere lesions (all with childhood onset: M=13 year recovery period) and 14 normal control participants were recruited. A computerized multitask high order working memory procedure was designed to generate many errors of omission and of commission.

RESULTS:

The expected double dissociation of response-bias distortion as a function of lesion side was significantly demonstrated on this task and was significantly frontal-lobe dependent.

CONCLUSION:

The hemispheres of the brain have an opposed response bias that is robustly implemented in infancy through adulthood.

KEYWORDS:

Response-bias; early vulnerability; energetics; errors of commission; errors of omission; executive functions; frontal lobes; hemispheric specialization; multitasking

PMID:
24240834
DOI:
10.3233/PRM-130249
[Indexed for MEDLINE]

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