Abstract:
:In what ways do passive touch and active touch require particular properties of cortical physiology? Because it is not easy to make predictions "bottom up" from neurophysiology and anatomy to behavior, there have been surprises in studying behavioral deficits following selective ablations of SI versus SII. For example, in earlier research on cats, unilateral ablation of SI unexpectedly had no effect on passive touch but did cause contralateral losses in posture and movement; it was ablation of SII plus subjacent cortex that led to contralateral losses in passive touch. In contrast, in a recent experiment with rats unilateral ablation of either SI or SII caused contralateral losses both in touch and postural reflexes. Some of the literature on dogs, monkeys, and humans suggests similarities with cats. To better understand these comparative findings, the following theoretical factors are considered: the degree of diffuseness versus specificity in brain input-output relations demanded or permitted by a behavior, the spatial and temporal scales of a behavior, the species' degree of encephalization, the need for stimulus generalization or functional equivalence of movements, and the relative sizes and sensitivities of different parts of the body. Hypotheses are also offered about why the evolution in rats of shortened forelimbs and increased vibrissal function may have entailed a peculiar compromise between active and passive touch and between functions of SI and SII.
journal_name
Exp Neuroljournal_title
Experimental neurologyauthors
Glassman RBdoi
10.1006/exnr.1994.1017subject
Has Abstractpub_date
1994-01-01 00:00:00pages
134-41issue
1eissn
0014-4886issn
1090-2430pii
S0014-4886(84)71017-Xjournal_volume
125pub_type
杂志文章,评审abstract::For most individuals, the respiratory control system produces a remarkably stable and coordinated motor output-recognizable as a breath-from birth until death. Very little is understood regarding the processes by which the respiratory control system maintains network stability in the presence of changing physiological...
journal_title:Experimental neurology
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journal_title:Experimental neurology
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pub_type: 杂志文章
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journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1006/exnr.2000.7572
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journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/0014-4886(91)90114-r
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journal_title:Experimental neurology
pub_type: 杂志文章
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journal_title:Experimental neurology
pub_type: 杂志文章
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pub_type: 杂志文章,评审
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journal_title:Experimental neurology
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journal_title:Experimental neurology
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journal_title:Experimental neurology
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abstract::Parkinson's disease (PD) is an aging-associated neurodegenerative disorder with progressive pathology involving the loss of midbrain dopaminergic neurons. Neurotrophic factors are promising for PD gene therapy; they are integrally involved in the development of the nigrostriatal system. Cerebral dopamine neurotrophic ...
journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1016/j.expneurol.2013.06.002
更新日期:2013-10-01 00:00:00
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journal_title:Experimental neurology
pub_type: 杂志文章
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更新日期:1983-08-01 00:00:00
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journal_title:Experimental neurology
pub_type: 杂志文章
doi:10.1006/exnr.2001.7806
更新日期:2002-02-01 00:00:00
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journal_title:Experimental neurology
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abstract::C2 spinal cord hemisection results in synaptic and astroglial changes in the phrenic nucleus which have been associated with the recovery of the ipsilateral hemidiaphragm during expression of the crossed phrenic phenomenon. As part of our ongoing analysis of the neurotransmitters involved, the present study investigat...
journal_title:Experimental neurology
pub_type: 杂志文章
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更新日期:1999-12-01 00:00:00