Journal ArticleDOI
Interhemispheric transfer of plasticity in the cerebral cortex
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Physiological data are presented showing that homotopic regions of primary somatosensory cortex are linked such that plasticity induced in one hemisphere, in the form of receptive field expansion brought about by a small peripheral denervation, is immediately mirrored in the other hemisphere.Abstract:
Each half of the body surface is represented topographically in the contralateral cerebral hemisphere. Physiological data are presented showing that homotopic regions of primary somatosensory cortex are linked such that plasticity induced in one hemisphere, in the form of receptive field expansion brought about by a small peripheral denervation, is immediately mirrored in the other hemisphere. Neurons which display the plasticity show no responsiveness to stimulation of the ipsilateral body surface. This suggests that the pathways and mechanisms mediating this transfer are specific to the role of maintaining balance, or integration, between corresponding cortical fields.read more
Citations
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The induction of pain: an integrative review
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Non-invasive brain stimulation: a new strategy to improve neurorehabilitation after stroke?
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Cortical and subcortical contributions to activity-dependent plasticity in primate somatosensory cortex.
TL;DR: In the long term, slow, deafferentation-dependent transneuronal atrophy at brainstem, thalamic, and even cortical levels are operational in promoting reorganizational changes, and the extent to which surviving connections can maintain a map is a key to understanding differences between central and peripheral de Afferentation.
References
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Connexions of the somatic sensory cortex of the rhesus monkey. II. Contralateral cortical connexions.
E. G. Jones,T. P. S. Powell +1 more
TL;DR: The study on the somatic sensory cortex of the cat to the monkey is extended not only for the obvious reason of its closer affinity to man, but also because the larger size and clearer boundaries of the architectonic and functional subdivisions of the first somatics sensory area make these individual subdivisions more amenable to investigation.
Journal ArticleDOI
Mapping the body representation in the SI cortex of anesthetized and awake rats
John K. Chapin,Chia-Sheng Lin +1 more
TL;DR: The cytoarchitectonic zones within the rat SI were divided into the following main categories: granular zones (GZs)–areas exhibiting koniocortical cy toarchitecture (i.e., containing dense aggregates of layer IV granule cells), perigranular zones [PGZs]–narrow strips of less granular cortex surrounding the GZs, and (3) dysgranular zones
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Noradrenergic axon terminals in the cerebral cortex of rat. III. Topometric ultrastructural analysis.
TL;DR: The fine structural characteristics of cortical NA fibers must be considered in the light of recent demonstrations of their intricate and widespread distribution throughout the cerebral cortex, as well as distant, common origin in the locus coeruleus.
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Immediate and chronic changes in responses of somatosensory cortex in adult flying-fox after digit amputation
TL;DR: This work has followed the changes in response in the primary somatosensory cortex in the flying-fox following amputation of the single exposed digit on the forelimb and found that neurons in the area of cortex receiving inputs from the missing digit were not silent but responded to stimulation of adjoining regions of the digit, hand, arm and wing.
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Functional role of GABA in cat primary somatosensory cortex: shaping receptive fields of cortical neurons.
TL;DR: A differential effect of BMI is suggested, suggesting that GABA controls receptive-field size in rapidly adapting regions, and indicates that neurons in rapid adapting regions differ pharmacologically from those in other submodality regions.