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Fig. 10. Schematic drawing comparing vector components of equine and primate (human
and monkey) vestibular acceleration in response to clockwise pitch rotation.
Rectangle in the 3 o'clock position represents equine vestibular apparatus
whereas rectangle in the 12 o'clock position represents primate vestibular
apparatus. Circle with small arrowheads depicts direction of rotation about
the pitch axis. Resultant vectors (Rh, Rp)
and their horizontal (Hh, Hp) and vertical
(Vh, Vp) components are depicted for
horses and primates, respectively.