[The effect of thyroid hormones on inhibition of monosynaptic extensor reflexes]

In thyreotoxic cats with intact or transected spinal cord, intensity of direct and presynaptic inhibition induced by a single volley in a flexor nerve afferent fibers was diminished and the delayed postsynaptic (polysynaptic) inhibition from the skin afferent fibers was more intense than in control cats. The mechanisms for the thyroid hormone effect on the cerebrospinal control of the extensor reflex inhibition, are discussed.