Postganglionic sympathetic nerve innervating human fallopian tube

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Abstract
Studies were made of effects of perivascular nerve stimulation on the mechanical activity of human fallopian tube in vitro. The optimal stimulation frequency was between 30 and 50 pulses/ sec. The contractile response to perivascular nerve stimulation was unaffected by ganglionic or cholinergic blocking agents. However, the contraction in response to perivascular nerve stimulation was abolished by treatment with alpha blocking agents; in the presence of phenoxy-benzamine, the response of the muscle changed from contraction to relaxation (sympathetic reversal). The inhibitory response was abolished by the beta blocking agent, propranolol. The optimal stimulation frequency of the inhibitory response was also between 30 and 50 pulses/sec. The potentiating action of adrenaline [epinephrine] on the contractile response to perivascular nerve stimulation was also reversed in the presence of alpha blocking agents.