Interindividual variability of central delay changes in the soleus H reflex pathway
作者:
Michele Abbruzzese,
Lizia Reni,
Emilio Favale,
期刊:
Muscle&Nerve
(WILEY Available online 1992)
卷期:
Volume 15,
issue 1
页码: 21-26
ISSN:0148-639X
年代: 1992
DOI:10.1002/mus.880150105
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: H reflex;central delay;synaptic transmission;interindividual variability;spatial summation
数据来源: WILEY
摘要:
AbstractCentral delay (CD) changes in the soleus H reflex pathway, as demonstrated by variations in the time interval between afferent (P1) and efferent (P2) neurographic volleys underlying the reflex response, were assessed in a group of normal subjects, both during the steady state and after homosynaptic spatial summation of afferent impulses. The maximal range of CD changes, regardless of whether “spontaneous” or provoked, showed significant interindividual differences whose size was positively related to the Hmax/Mmax ratio, provided that the extension of the subliminal fringe was suitably normalized. Comparatively similar variations in amplitude of the reflex motoneuronal discharge under different experimental conditions can be associated with different CD changes. Indeed, “spontaneous” CD fluctuations occurring during the steady state were consistently greater than CD reductions provoked by spatial summation, the gap size being negatively related to the Hmax/Mma
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