Re-examination of a hair cell organelle in the cuticular late region and its possible relation to active processes in the cochlea.
Slepecky-N; Hamernik-RP; Henderson-D
Hear Res 1980 Jun; 2(3-4):413-421
The consistent occurrence of Friedmann bodies or striated organelles was reported in the infracuticular plate region of the inner hair cells of normal chinchilla cochlea. This finding suggested that the striated body is a normal structural component of the inner hair cells and that it may be important in inner hair cell function. Both cochleas from five normal chinchillas were studied. A striated organelle was found in each of 40 inner hair cells that were sectioned. It was never observed in any of the outer hair cells although three times as many outer hair cells were examined. The striated body appeared associated with the plasma membrane of the inner hair cell, had a complex morphology and at times projected into the cytoplasm of the inner hair cell toward the centrally placed nucleus. Many inner hair cells may be observed at one time on sectioning the organ of Corti in a plane parallel to the basilar membrane. The striated body was in contact with the junctional complex material at the circumference of the cell and surrounding the cuticle free region where the basal body was normally found. While the function of the striated body in the inner hair cells is not known, it is suggested that it may provide structural support and active participation in inner hair cell functions.
NIOSH-Publication; NIOSH-Grant; Noise-induced-hearing-loss; Ears; Laboratory-animals; Cell-morphology
Callier Ctr/communic Disorders Callier Center 1966 Inwood Road Dallas, Tex 75235
University of Texas Dallas, Richardson, Texas