Question

In a nervous system lab activity, you are asked to stand on one foot with arms folded and the

    other leg flexed to 90 degrees at the knee joint. After holding that position for 30 seconds, you

    are asked to close your eyes and remain standing on one foot.

a. List the three systems that helped you stand on one foot with your eyes open.

b. Which one of those systems sends action potentials directly to the cerebellum? Which nerve

    receptor and sensory pathway are involved?

Answer 1

a;; There are 3  sensory system that provide input to the cerebellum to maintain truncal stability when the eyes are open : vision ( eyes) Proprioception ( a sensory receptor which receives stimuli from within the body)   Vestibular sense.( located in ear mainatains balance of body)

b ;; loss of equilibrium causing an altered walking gait systems sends action potentials directly to the cerebellum is vestibular nerve . cell bodies, of the afferent fibres lie in the vestibullar ganglia near the end organ. Most of the nerve fibres pass from there to vestibularn nuclei in the pons, while others pass directly to the cerebellum