[The effect of stimulation of the substantia nigra on low- and high-threshold startle reflexes in the cat].
Effects of the substantia nigra (pars compacta) stimulation on two functional types of startle reflexes were studied in chloralose-anesthetized cats. The reflexes were the low-threshold ones evoked by tactile stimuli (T-reflex) and high-threshold ones evoked by intense peripheral nerve stimulation (spino-bulbo-spinal, SBS reflex). It was found that substantia nigra stimulation exerted mainly inhibitory influences on both types of reflexes. However the depression of the SBS-reflex was always more profound and long lasting (up to 8 min) than that of T-reflex. The latter reflex was sometimes facilitated.
Gokin
A P
AP
Karpukhina
M V
MV
Limanskiĭ
Iu P
IuP
D000818:Animals; D002415:Cats; D003213:Conditioning, Psychological / Q000502:physiology; D009433:Neural Inhibition / Q000502:physiology; D010812:Physical Stimulation / Q000379:methods; D013216:Reflex, Startle / Q000502:physiology*; D012684:Sensory Thresholds / Q000502:physiology; D013378:Substantia Nigra / Q000502:physiology*; D013997:Time Factors
Vliianie stimuliatsii chernoĭ substantsii na nizko- i vysokoporogovyĭ refleksy vzdragivaniia u koshek.