[Functional characteristics of rapidly adapting mechanoreceptor units of the rat mammary gland nipple].
Two types of rapidly adapting mechanosensitive units were found in the teat of the rat mammary gland (RAI and RAII). Neither was spontaneously active. 10% of the units were RAII and had the functional characteristics of "transient" receptors. The relation between the average frequency of discharge and the velocity of displacement at a constant displacement amplitude was linear for RAI. The latency of the first spike decreased when indentation velocity increased. The number and frequency of afferent impulses decreased at a repeated mechanical stimulation. Vibratory tuning points were in the range 10--25 Hz for RAI. RAI units were not directionally sensitive to the teat displacement.
D000200:Action Potentials; D000818:Animals; D001940:Breast / Q000294:innervation*; D005260:Female; D008465:Mechanoreceptors / Q000502:physiology*; D009475:Neurons, Afferent / Q000502:physiology; D009558:Nipples / Q000294:innervation*; D010812:Physical Stimulation; D051381:Rats
Funktsional'nye kharakteristiki bystro adaptiruiushchikhsis mekhanoretseptornykh edinits soska molochnoĭ zhelezy krysy