28. The colliculus is located in a part of the brain known as the midbrain. The

Question

28. The colliculus is located in a part of the brain known as the midbrain. The colliculospinal tract controls reflexive movements of the head and neck in response to visual or auditory input. This tract is responsible for orienting to a sound in the environment. You would expect neurons in this tract to have their input regions in the ________________ and their output regions in the ________________________.

a. midbrain, gray matter of the spinal cord

b. dorsal horn of the spinal cord, midbrain

c. colliculus, dorsal columns

d. midbrain, dorsal root ganglion

e. ventral horn, colliculus

31. We have not yet talked about the sympathetic and parasympathetic ganglia of the autonomic nervous system, but from what you know of the nomenclature, you would expect them to contain neuronal cell bodies in the:

a. spinal cord

b. brain stem

c. cerebral cortex

d. peripheral nervous system e. all except d are correct

32. The neurons whose cell bodies are found in the ventral (anterior) horn of the spinal cord and enter the periphery in the ____________ are _____________ whose output regions synapse on ______________.

a. dorsal root, somatic afferents, second order neurons b. ventral root, somatic afferents, muscle cells

c. ventral root, somatic efferents, muscle cells

d. dorsal root, somatic efferents, second order neurons e. ventral root, somatic efferents, second order neurons

Explanation / Answer

28. (c,e) Colliculus and dorsal column, ventral horn and colliculus.

31. (e) all except d are correct.

32 a,c

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