Occurrence of the H reflex and the F wave in the rat.
In adult rats the tibial nerve was stimulated at the ankle and the evoked EMG of the foot muscles was recorded. A low threshold reflex discharge was elicited that was subsequently depressed by stronger stimuli eliciting the direct (M) wave. This discharge was abolished by cutting the dorsal roots (except for 1-3% postulated to be due to recurrent discharge). It had a central latency of about 2 msec, was depressed by stimulation rates above 0.3/sec and showed posttetanic depression, all of which are also properties of the rats's monosynaptic reflex. By analogy it is assumed to be an H reflex.
D000818:Animals; D005071:Evoked Potentials; D005260:Female; D006181:H-Reflex; D008297:Male; D009132:Muscles / Q000502:physiology*; D009431:Neural Conduction; D009475:Neurons, Afferent / Q000502:physiology; D009476:Neurons, Efferent / Q000502:physiology; D051381:Rats / Q000502:physiology*; D011930:Reaction Time; D012023:Reflex, Monosynaptic; D013126:Spinal Nerve Roots / Q000502:physiology; D013979:Tibial Nerve / Q000502:physiology