The ___________ vestibulospinal tract is the primary tract for vestibular influence on lower motor neurons to postural muscles in the limbs and trunk
A. Lateral
B. Medial
C. Anterior
D. Posterior
ANS: A
Rationale: The lateral vestibulospinal tract, originating in the lateral vestibular nucleus, is the primary tract for vestibular influence on lower motor neurons to postural muscles in the limbs and trunk. The medial vestibulospinal tract, via projections to the cervical spinal cord, conveys signals that adjust head position to upright according to information signals from the vestibular apparatus. There are no anterior or posterior vestibulospinal tracts.
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