Cochlear hair cell's mechanoelectrical sensitivity

Range ~0.2 mV/nm
Organism Turtle Trachemys scripta elegans
Reference Crawford AC, Fettiplace R. The mechanical properties of ciliary bundles of turtle cochlear hair cells. J Physiol. 1985 Jul364: 359-79. p.359 heading '6' & p.367 2nd paragraphPubMed ID4032304
Method "The object of the work to be described is a quantitative analysis of the mechanical properties of the hair bundles. The approach has been to measure the bending of a single bundle in the turtle cochlea by attaching it to a flexible glass fibre, and monitoring the fibre's motion through its shadowing of a light beam falling on a photodiode array."
Comments "The amplitude of the initial oscillation increased with displacements up to 100 nm and then saturated. For small displacements of a few nanometres, the hair cell's mechanoelectrical sensitivity was estimated as about 0.2mV/nm...From the low level responses, the linear mechanoelectrical sensitivity of the transduction process could be estimated. For the cells illustrated, a value of 0.35mV/nm was obtained and for other cells the sensitivity measured in this way normally exceeded 0.1 mV/nm (mean±S.D. = 0.192±0.097mV/nm: n=12)."
Entered by Uri M
ID 111036