Mechanical and thermal responses of polymodal receptors recorded from the superior spermatic nerve of dogs.

作者: T Kumazawa , K Mizumura

DOI: 10.1113/JPHYSIOL.1980.SP013122

关键词:

摘要: 1. One hundred and fifty-three units were recorded from the superior spermatic nerve of dogs tested with mechanical, chemical or heat stimulation. Among 104 all three methods stimulation ninety-three responded to them; thus 90% are considered be polymodal receptors. Only mechanical thermal responses reported in this paper. 2. Conduction velocities measured at trunk abdominal cavity mostly within A-delta fibre range (average conduction velocity: 11.1 m.s-1, n = 63), but receptive region much delay was observed. In contrast cutaneous receptors, receptors usually had multiple sites, up nine number. 3. Mechanical these consisted dynamic steady-state sometimes followed by after-discharges. Maximum obtained a noxious intensity stimulation, thresholds scattered over wide including non-noxious intensities. 4. response heating, gave an irregular discharge that increased roughly parallel temperature rise average threshold S.E. mean, 42.6+/-0.4 degrees C (n 73). They showed sensitization deactivation both on repetition heating. Cooling site caused only transient weak responses, if any.

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