Responses of midbrain lateral line units of the goldfish, Carassius auratus, to constant-amplitude and amplitude-modulated water wave stimuli |
| |
Authors: | D Plachta J Mogdans H Bleckmann |
| |
Institution: | Institut für Zoologie, Universit?t Bonn, Poppelsdorfer Schlo?, D-53115 Bonn, Germany e-mail: Bleckmann@uni-bonn.de Tel.: +49-228-73-5453; Fax: +49-228-73-5458, DE
|
| |
Abstract: | Responses of mechanosensory lateral line units to constant-amplitude hydrodynamic stimuli and to sinusoidally amplitude-modulated
water movements were recorded from the goldfish (Carassius auratus) torus semicircularis. Responses were classified by the number of spikes evoked in the unit's dynamic range and by the degree
of phase locking to the carrier- and amplitude-modulation frequency of the stimulus. Most midbrain units showed phasic responses
to constant-amplitude hydrodynamic stimuli. For different units peri-stimulus time histograms varied widely. Based on iso-displacement
curves, midbrain units prefered either low frequencies (≤33 Hz), mid frequencies (50–100 Hz), or high frequencies (≥200 Hz).
The distribution of the coefficient of synchronization to constant-amplitude stimuli showed that most units were only weakly
phase locked. Midbrain units of the goldfish responded to amplitude-modulated water motions in a phasic/tonic or tonic fashion.
Units highly phase locked to the amplitude modulation frequency, provided that modulation depth was at least 36%. Units tuned
to one particular amplitude modulation frequency were not found.
Accepted: 10 July 1999 |
| |
Keywords: | Mechanoreception Hydrodynamic Dipole Neuromast Torus semicircularis |
本文献已被 SpringerLink 等数据库收录! |
|