Abstract：
:We studied the potential contribution of postsynaptic mechanisms to the depression of reflex excitability which occurs immediately after a voluntary release from tonic muscle contraction. The excitability of the Soleus (Sol) motor pool was tested at rest and after voluntary muscle relaxation. In both cases the Sol H-reflex was conditioned by a single shock to the peroneal nerve, in order to activate the Ia interneurones (INs) mediating the reciprocal inhibition via a peripheral input, or by a short-lasting voluntary contraction of the Tibialis Anterior (TA) muscle, to activate the Ia INs via a central command. Changes in excitability of Renshaw cells were also tested at rest and after release, to assess the role of recurrent inhibition in the release-induced inhibition of the Sol H-reflex. It was demonstrated that: the excitability of the INs mediating the reciprocal inhibition was only slightly enhanced in comparison with resting conditions; the H-reflex of the antagonist muscle (TA) evoked after Sol release was not consistently facilitated with respect to rest; the command to contract the TA muscle reduced the H-reflex of the Sol muscle during rest but not after Sol release; recurrent inhibition did not increase its effect in the post-release period. Such features suggest that recurrent and reciprocal post-synaptic inhibitions do not play a major role in reducing the reflex excitability of a relaxing muscle; rather, the command to release prevents the reciprocal inhibitory effect which accompanies the contraction of the antagonist muscle.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Schieppati M,Crenna Pdoi
10.1007/BF00230904subject
Has Abstractpub_date
1985-01-01 00:00:00pages
249-56issue
2eissn
0014-4819issn
1432-1106journal_volume
59pub_type
杂志文章abstract：:The climbing fibres to the x and lateral c1 zones of the anterior lobe of the cerebellum arise as branches of common stem olivary axons. Anatomical studies have shown that the c1 zone receives its climbing fibres from the dorsal accessory olive (DAO). It has, therefore, been assumed that the x-zone also receives its c...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00235868
更新日期：1985-01-01 00:00:00
abstract：:The luminance detectors in the olivary pretectal nucleus, which are likely candidates mediating the pupillary light reflex, responded to all frequencies of sinusoidally modulated light up to 12-25 Hz. At low frequencies (0.05-4.0 Hz) the luminance detectors responded with modulated firing to different stimulation rate...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237669
更新日期：1985-01-01 00:00:00
abstract：:1. Individual neurons were recorded extracellularly in the precentral forelimb area of two monkeys trained to perform rapid, large amplitude flexion and extension movements of the contralateral forearm in response to auditory signals. Electromyographic (EMG) activity in the biceps/triceps muscles was recorded separate...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00228859
更新日期：1990-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00230958
更新日期：1991-01-01 00:00:00
abstract：:When humans pursue motion stimuli composed of alternating constant velocity segments of randomised duration (RD), they nevertheless initiate anticipatory eye deceleration before stimulus direction changes at a pre-programmed time based on averaging prior stimulus timing. We investigated, in both the time and frequency...
journal_title：Experimental brain research
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00221-011-2725-9
更新日期：2011-07-01 00:00:00
abstract：:There are two ways in which responses to successive unexpected stimuli are attenuated, namely through habituation and conditioning. For the latter, it suffices that the unexpected stimulus is preceded by another just perceivable stimulus. In spinal cord reflexes this is termed conditioning, while in brainstem reflexes...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-005-0305-6
更新日期：2006-06-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00228095
更新日期：1996-03-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00235290
更新日期：1984-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-011-2970-y
更新日期：2012-03-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-020-05910-y
更新日期：2020-11-05 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0408-8
更新日期：2006-09-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00248760
更新日期：1988-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-015-4345-2
更新日期：2015-09-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-008-1319-7
更新日期：2008-05-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210100877
更新日期：2001-12-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00238886
更新日期：1981-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0717-y
更新日期：2007-03-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229880
更新日期：1992-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00238752
更新日期：1981-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00236282
更新日期：1984-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-005-0189-5
更新日期：2006-03-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/s00221-006-0638-9
更新日期：2007-02-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00228400
更新日期：1993-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00228253
更新日期：1992-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-002-1012-1
更新日期：2002-04-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00227778
更新日期：1993-01-01 00:00:00
abstract：:An aberrant crossed corticotectal pathway can be generated by removal of one visual cortex and the contralateral superior colliculus from newborn rats. This aberrant crossed corticotectal projection arises from the pyramidal neurons located in layer V of the visual cortex and terminates in a spatially orderly manner i...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00235562
更新日期：1978-11-15 00:00:00
abstract：:1.) Eye movements were recorded in four Java monkeys (M. fascicularis) after unilateral microinjections (1 microliter, concentration 1 micrograms/microliter) of the GABA antagonist, bicuculline, and the GABA agonist, muscimol, into oculomotor related regions of the vestibular nuclei. Eye movements were investigated in...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00228958
更新日期：1991-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 临床试验,杂志文章
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更新日期：1999-07-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-004-2190-9
更新日期：2005-06-01 00:00:00
