Rapid responses of the cupula in the lateral line of ruffe (Gymnocephalus cernuus)

B Curcic-Blake, SM van Netten*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

6 Citaten (Scopus)
22 Downloads (Pure)

Samenvatting

Displacements of cupulae in the supraorbital lateral line canal in ruffe (Gymnocephalus cernuus) have been measured using laser interferometry and by applying transient as well as sinusoidal fluid stimuli in the lateral line canal. The cupular displacement in response to impulses of fluid velocity shows damped oscillations at approximately 120 Hz and a relaxation time-constant of 4.4 ms, commensurate with a quality factor of approximately 1.8. These values are in close agreement with the frequency characteristics determined via sinusoidal fluid stimuli, implying that the nonlinearity of cupular dynamics imposed by the gating apparatus of the sensory hair cells is limited in the range of cupular displacements and velocities measured (100-300 nm; 100-300 mu m/s). The measurements also show that cupular displacement instantaneously follows the initial waveform of transient stimuli. The functional significance of the observed cupular dynamics is

Originele taal-2English
Pagina's (van-tot)393-401
Aantal pagina's9
TijdschriftJournal of comparative physiology a-Neuroethology sensory neural and behavioral physiology
Volume191
Nummer van het tijdschrift4
DOI's
StatusPublished - apr.-2005

Citeer dit