The inhibitory response of the XXXX anococcygeus muscle.

@entity4033 @entity5128 @entity1022 @entity95 @entity6958 @entity2647 @entity3303 @entity3897 @entity6310 @entity2778 @entity855 @entity934
1. Strips of @entity95 anococcygeus muscle were submaximally contracted by the addition of @entity2647 to the bath fluid. 2. @entity934 , @entity6958 and electrical field stimulation caused relaxation. Relaxation induced by @entity934 and field stimulation was blocked by @entity1022 but only the @entity934 -induced response was inhibited by @entity3303 , @entity5128 and @entity4033 . The responses to both @entity934 and field stimulation were resistant to @entity3897 , @entity6310 , and @entity2778 . 3. Relatively high concentrations of @entity855 caused relaxation. 4. Histological investigation did not show any cells resembling autonomic ganglion cells. 5. It is suggested that both @entity934 and field stimulation release an inhibitory transmitter from nerve endings and that the release by @entity934 is mediated through nicotinic receptor stimulation.
