Sm. Jones et al., Vestibular responses to linear acceleration are absent in otoconia-deficient C57BL/6JEi-het mice, HEARING RES, 135(1-2), 1999, pp. 56-60
Vestibular evoked potentials (VsEPs) were measured in normal mice and in mi
ce homozygous for the head tilt mutation (hetlhet, abbr. het). The het mice
lack otoconia, the inertial mass critical for natural stimulation of inner
ear gravity receptors. Our findings demonstrate that vestibular neural res
ponses to pulsed linear acceleration are absent in het mice. The results: (
1) confirm that adequate sensory stimuli fail to activate gravity receptors
in the het model; and (2) serve as definitive evidence that Far-field vest
ibular responses to pulsed linear acceleration depend critically on otolith
end organs. The C57BL/6JEi-het mouse may be an excellent model of gravity
receptor sensory deprivation. (C) 1999 Elsevier Science B.V. All rights res
erved.