TY - JOUR
T1 - Different effect of height on latency of leg and foot short- and medium-latency EMG responses to perturbation of stance in humans
AU - Nardone, Antonio
AU - Grasso, Margherita
AU - Giordano, Andrea
AU - Schieppati, Marco
PY - 1996/3/15
Y1 - 1996/3/15
N2 - In standing humans, platform perturbations evoked short- (SLR) and medium-latency responses (MLR) in soleus (Sol), tibialis anterior (TA) and flexor digitorum brevis (FDB) muscles. The latency of all responses significantly increased with subjects' height. The slope of the regression lines for the MLRs versus height was significantly steeper than that for the SLRs. The conduction velocity of the efferent fibres mediating the FDB MLR, calculated on the basis of the regression, was 17.5 m/s. These findings indicate that the MLRs are transmitted through efferent fibres slower than those mediating the SLRs. While the latter fibres are spindle group Ia afferents, the former are suggested to be group II fibres.
AB - In standing humans, platform perturbations evoked short- (SLR) and medium-latency responses (MLR) in soleus (Sol), tibialis anterior (TA) and flexor digitorum brevis (FDB) muscles. The latency of all responses significantly increased with subjects' height. The slope of the regression lines for the MLRs versus height was significantly steeper than that for the SLRs. The conduction velocity of the efferent fibres mediating the FDB MLR, calculated on the basis of the regression, was 17.5 m/s. These findings indicate that the MLRs are transmitted through efferent fibres slower than those mediating the SLRs. While the latter fibres are spindle group Ia afferents, the former are suggested to be group II fibres.
KW - EMG
KW - Height
KW - Human
KW - Postural perturbation
KW - Spindle group II afferents
UR - http://www.scopus.com/inward/record.url?scp=0029967519&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029967519&partnerID=8YFLogxK
U2 - 10.1016/S0304-3940(96)12430-7
DO - 10.1016/S0304-3940(96)12430-7
M3 - Article
C2 - 8710194
AN - SCOPUS:0029967519
VL - 206
SP - 89
EP - 92
JO - Neuroscience Letters
JF - Neuroscience Letters
SN - 0304-3940
IS - 2-3
ER -