Ch. 9: Brain Stem

Question 1

T/F: The dorsal midbrain is the area immediately caudal to the thalamus and rostral to the 4th ventricle.

Answer 1

True

Question 2

The ventral pons lies immediately caudal to the \_\_\_\_\_ and rostral to the \_\_\_\_.
A. Optic chiasm, abducent nerve
B. Crus cerebri, pyramid
C. Trigeminal nerve, hypoglossal nerve
D. Cerebellar peduncle, crus cerebri

Answer 2

B. Crus cerebri, pyramid

Question 3

The midbrain gives rise to the:
A. Optic nerve
B. Optic nerve and trochlear nerve
C. Oculomotor nerve and trochlear nerve
D. Oculomotor nerve and abducent nerve

Answer 3

C. Oculomotor nerve and trochlear nerve

Question 4

The motor nucleus that innervates the muscles of the lacrimal gland is named:
A. Motor nucleus of the facial nerve
B. Motor nucleus of the trigeminal nerve
C. Parasympathetic nucleus of the facial nerve
D. Parasympathetic nucleus of the oculomotor nerve

Answer 4

C. Parasympathetic nucleus of the facial nerve

Question 5

A bilateral lesion of the midbrain is likely to result in:
A. Loss of pupillary light reflex
B. Loss of auditory reflex
C. Areflexia of all four limbs
D. Coma

Answer 5

D. Coma

Question 6

T/F: Motor nuclei in the brain stem form, like those in the spinal cord, one large continuous column extending from the midbrain to the medulla.

Answer 6

False

Question 7

Efferent fibers to skeletal muscle derived from the somatopleure or brachial arches are classified as:
A. General somatic afferent (GSA)
B. General somatic efferent (GSE)
C. Special visceral afferent (SVA)
D. Special somatic afferent (SSA)

Answer 7

B. General somatic efferent (GSE)

Question 8

T/F: Many ascending and descending tracts in the brain stem occupy the lateral and ventral areas.

Answer 8

True

Question 9

The corticospinal tract occupies at the:
A. Lateral medulla oblongata
B. Ventral medulla oblongata
C. Lateral pons
D. Ventral midbrain

Answer 9

B. Ventral medulla oblongata

Question 10

The internal acoustic meatus carries the cranial nerve(s):
A. IV
B. V
C. V and VIII
D. VII and VIII

Answer 10

D. VII and VIII