Figure 2. Cilia in various types of cells in the brain.
(a) Motile cilia anchored to the basal body are present in the ependymal cells lining the ventricle. (b) Neurons contain primary cilia projecting from basal bodies, but the cilium appears buried among the dendrites and axons of adjacent neurons. (c) Schematic diagram of the cilia axoneme cross-section. Motile cilia have 9 + 2 microtubule pair ultrastructure, with inner and outer dynein arms, whereas primary cilia have 9 + 0 microtubule pair ultrastructure, without dynein arms.