Response properties of gerbil otolith afferents to small angle pitch and roll tilts

J. David Dickman, Dora E. Angelaki, Manning J. Correia

Research output: Contribution to journalArticlepeer-review

Abstract

The responses from isolated single otolith afferent fibers were obtained to small angle sinusoidal pitch and roll tilts in anesthetized gerbils. The stimulus directions that produced the maximum (response vector) and minimum response sensitivities were determined for each otolith afferent, with response vectors for the units being spread throughout the horizontal plane, similar to those reported for other species. A breadth of tuning measure was derived, with narrowly tuned neurons responding maximally to stimulation in one direction and minimally along an orthogonal ('null') direction. Most (≈80%) otolith afferents are narrowly tuned, however, some fibers were broadly tuned responding significantly to stimulations in any direction in the horizontal plane. The number of broadly tuned otolith afferents (≈20%) differs significantly from the more substantial number of broadly tuned vestibular nuclei neurons (88%) recently reported in rats.

Original languageEnglish (US)
Pages (from-to)303-310
Number of pages8
JournalBrain Research
Volume556
Issue number2
DOIs
StatePublished - Aug 16 1991

Keywords

  • Afferent
  • Linear acceleration
  • Otolith
  • Sensory
  • Vestibular

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

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