Some hydrodynamic properties of the posterior canal in the frog labyrinth related to neuronal responses.
Measurements of the posterior-canal radius of curvature (R), the semicircular-duct radius (r) and the cupula radius (rC) were performed in the frog labyrinth. The Steinhausen-van Egmond equation led to an estimate of the canal endolymph flow, cupula deflection and sensory hair bending during constant angular accelerations (0.2-64 degrees/s2) of opposite directions and increasing duration (1.2-12 s). This analysis suggests that the non-linear canal afferent discharge behaviour exhibited by some units may not arise at the presynaptic level but rather postsynaptically, at the encoder site.
D000054:Acceleration; D000818:Animals; D001696:Biomechanical Phenomena; D004594:Electrophysiology; D004710:Endolymph / Q000502:physiology*; D007761:Labyrinthine Fluids / Q000502:physiology*; D008959:Models, Neurological; D009475:Neurons, Afferent / Q000502:physiology*; D010812:Physical Stimulation; D011893:Rana esculenta; D012665:Semicircular Canals / Q000294:innervation / Q000502:physiology*