An electrophysiological investigation of the receptor apparatus of the duck's bill

摘要: 1. The properties of receptors in the duck's bill have been studied by recording from units isolated dissecting fine filaments maxillary and ophthalmic nerves. 2. were divisible into three groups, phasic mechanoreceptors responsive to vibration, thermoreceptive units, high threshold mechanoreceptors. 3. Vibration-sensitive (113 units) had small receptive fields, showed a rapidly adapting discharge mechanical stimulation bill, sensitive vibratory but not thermal stimuli no background discharge. 4. Temperature (twenty-one insensitive temperature-dependent discharge. Sudden cooling produced transient increase frequency. 5. High mechanosensitive (eight gave slowly strong stimulation. 6. It is concluded that low-threshold, vibration-sensitive responses come Herbst corpuscles. No specific function can yet be assigned Grandry