2015 Hearing & Balance

Example Test QuestionStructure/Function Relationships

Hair cell structure

TYPE I
TYPE II
90% of afferents
10% of afferents
  • each afferent innervates 1 hair cell
  • each hair cell can contact multiple afferents
  • afferents form large secure synapses (calyx)
  • each afferent innervates many hair cells
  • each hair cell contacts 1-3 afferents
  • small, bouton-like synapses
efferents terminate on afferent terminals
under IHCs
efferents have large, direct contacts
with OHC soma

    1. In the cochlea, OHCs have specialized lateral cisternae and other structural adaptations that support their function as contractile units
Email: Dr. Janet Fitzakerley | ©2015 University of Minnesota Medical School Duluth | Last modified: 24-jan-15 5:16 PM