[Effects of experimental muscle pain on short and long-latency components of stretch-reflex in the elbow muscles of the unanaesthetized cat].
Electromyographic (EMG) activity of the elbow joint muscles induced during passive extension of the joint was recorded from the unaesthetized cat before and after injection of 5% NaCl solution which has been used as an activator of nociceptors. It was shown that the amplitude of the long-latency M2 component of flexor stretch-reflex was significantly increased after injection of saline while the amplitude change of shot-latency M1 component was insignificant. The latency of EMG in flexor significantly decreased. The changes of extensor EMG response parameters were similar but less expressed. Duration of such effect could achieve 20 minutes, after that all response parameters of stretch-reflex returned to the standard values.
Lyzun
D V
DV
Tal'nov
A M
AM
Dovhalets'
H V
HV
Kostiukov
O I
OI
D000818:Animals; D002415:Cats; D004576:Electromyography; D005552:Forelimb / Q000503:physiopathology*; D018482:Muscle, Skeletal / Q000503:physiopathology*; D010146:Pain / Q000503:physiopathology*; D012026:Reflex, Stretch / Q000502:physiology*; D013997:Time Factors