Spino-spinal mechanisms in the chloralose anaesthetized cat.
1. In chloralose anaesthetized cats the events in the lumbosacral cord that follow stimulation of a forepaw or neck nerve have been examined.2. Four events take place in the lumbosacral cord after forepaw or neck muscle nerve stimulation. These are: (1) a brief period of generalized enhanced motoneurone excitability, (2) a prolonged and as yet unexplained enhancement of monosynaptic reflexes, (3) a period of presynaptic inhibition in muscle and skin afferent fibres, and (4) a prolonged inhibition of spino-bulbo-spinal reflexes.3. A variable and sometimes selective reduction of one or another descending effects follows the placing of small lesions in the anterior portion of the suprasylvian gyrus.
D000200:Action Potentials; D000768:Anesthesia, General; D000818:Animals; D002415:Cats; D002540:Cerebral Cortex / Q000502:physiology; D002698:Chloralose / Q000008:administration & dosage / Q000494:pharmacology*; D004558:Electric Stimulation; D005071:Evoked Potentials; D005552:Forelimb / Q000502:physiology; D007275:Injections, Intravenous; D009046:Motor Neurons / Q000502:physiology; D009132:Muscles / Q000502:physiology; D009333:Neck; D009431:Neural Conduction; D009475:Neurons, Afferent / Q000502:physiology; D012023:Reflex, Monosynaptic; D013116:Spinal Cord / Q000502:physiology*; D013497:Sural Nerve / Q000502:physiology
D002698:Chloralose