Spinous extensions on ciliary necklaces in ependymal cells.
In ependymal cells of the mouse the neck region of all cilia examined by means of transmission electron microscopy exhibited rows of electron-dense spines. THese structures correspond to ciliary necklace reported from freeze-etch studies, a structure presumed to serve as an energy-regulating system in motile cilia.
D000818:Animals; D002923:Cilia / Q000648:ultrastructure*; D004805:Ependyma / Q000166:cytology / Q000648:ultrastructure*; D051379:Mice