[Measurement of the single muscle fiber action potentials and jitter value in tibialis anterior muscles of rabbits in situ].
With a home-made jitter data processing board and microcomputer for recording extracellular single fiber action potential (SF-AP), variations of the time intervals of the SF-AP pairs, or the jitters, from two adjacent muscle fibers in the unique motor unit in tibialis' anterior in response to repeated stimuli were measured. The jitter distribution of 936 recorded from 7 rabbits was positively showed with a percentile value of P75-P25 of 54.99-14.61 microseconds. The data suggested that the lower limit was smaller than that of skeletal muscles in normal human and that there exists also some differences in the jitter values of SFEMG between human and rabbit muscles.
Cheng
X Z
XZ
Department of Physiology, Weifang Medical College.
Liu
R L
RL
Zhou
W Q
WQ
Zhao
X G
XG
Li
N
N
Zhao
G F
GF
Hou
J P
JP
Wang
R F
RF
Qiao
Y F
YF
D000200:Action Potentials; D000818:Animals; D004558:Electric Stimulation; D004576:Electromyography; D001330:Electronic Data Processing; D005260:Female; D008297:Male; D009132:Muscles / Q000502:physiology*; D011817:Rabbits