Rotation of the Head to Its Right

Question

Rotation of the head to its right
A) Excites hair cells in the right horizontal canal but inhibits them in the left
B) Excites hair cells in both right and left horizontal canals
C) Inhibits hair cells in both right and left horizontal canals
D) Inhibits hair cells in the right horizontal canal but excites them in the left
E) Makes a person dizzy

Accepted Answer

When the head rotates to the right, the endolymph in the right horizontal semicircular canal lags behind due to inertia, causing deflection of the cupula and excitation of the hair cells. Conversely, in the left horizontal canal, the endolymph movement causes inhibition of the hair cells.