Download BRAINSTEM AND CRANIAL NERVES I. MULTIPLE CHOICE: Circle

BRAINSTEM AND CRANIAL NERVES
I. MULTIPLE CHOICE: Circle all correct answers. There may be more than one
correct answer per question.
1. Fibers of the corticospinal tract can be found in:
a.
b.
c.
d.
e.
the pyramid of the medulla
the internal capsule
the cerebral peduncle
Lissauer's tract
the cerebellar peduncles
2. Fibers of the lateral corticospinal tract (i.e., the component that runs in the lateral
funiculus) decussate
a.
b.
c.
d.
e.
at all levels of the brainstem
in the midbrain
in the lower medulla
in the upper pons
in the spinal cord
3. The roof of the midbrain is formed by the
a.
b.
c.
d.
e.
cerebellum
cerebral cortex
pontine nuclei
cerebral peduncles
superior and inferior colliculi
4. There are no motorneurons rostral to the level of the
a.
b.
c.
d.
e.
pyramidal decussation
pontine nuclei
oculomotor nucleus
hypoglossal nucleus
inferior olive
5. Motorneurons innervating the extraocular muscles can be found in
a.
b.
c.
d.
e.
the oculomotor nucleus
the trigeminal nucleus
the facial nucleus
the abducens nucleus
the trochlear nucleus
6. Which of the following nerves carry information concerning taste?
a.
b.
c.
d.
e.
the glossopharyngeal nerve (IX)
the facial nerve (VII)
the hypoglossal nerve (XII)
the vestibulocochlear nerve (VIII)
the accessory nerve (XI)
7. Which of the following can be found in the medulla?
a.
b.
c.
d.
e.
inferior olive
hypoglossal nucleus
corticospinal fibers
nucleus ambiguus
dorsal motor nucleus of the vagus
8. Which of the following can be found in the pons?
a.
b.
c.
d.
e.
abducens nucleus
dorsal column nuclei
medial lemniscus
lateral geniculate nucleus
point of entry of trigeminal sensory fibers into brain
9. Which of the following can be found in the midbrain?
a.
b.
c.
d.
e.
superior colliculus
cerebral aqueduct
fourth ventricle
axons originating in cells of the dorsal column nuclei
oculomotor nucleus
10. Preganglionic parasympathetic motorneurons contribute axons to
a.
b.
c.
d.
e.
the oculomotor nerve
the hypoglossal nerve
the trochlear nerve
the trigeminal nerve
the vagus nerve
11. The facial nerve (VII) contains axons that
a.
b.
c.
d.
e.
innervate muscles of facial expression
innervate muscles of the tongue
innervate taste buds of the tongue
arise from preganglionic parasympathetic cell bodies in the brainstem
innervate muscles of mastication
12. Which of the following nerves exit the brainstem at the junction of the pons and
medulla?
a.
b.
c.
d.
e.
oculomotor (III)
trigeminal (V)
facial (VII)
vagus (X)
abducens (VI)
13. Motorneurons contributing axons to the vagus (X) nerve are found in:
a.
b.
c.
d.
e.
anterior horn of cervical spinal cord
the dorsal motor nucleus of the vagus
the inferior salivatory nucleus
the nucleus ambiguus
the nucleus of the solitary tract
II. TRUE OR FALSE: Circle T or F as appropriate:
T F 1. There are more cortical efferent fibers in the cerebral peduncle than the
medullary pyramid because many of these fibers synapse in the pons
rather than in the medulla and spinal cord.
T F 2. A stroke destroying the motor cortex in the right hemisphere will produce
axonal degeneration in the anterior funiculus of the spinal cord on the
same side.
T F 3. The cranial nerves of the midbrain contain essentially no sensory axons.
T F 4. The trigeminal nerve does not contain any axons of motorneurons.
T F 5. Two surface features of the medulla oblongata are the pyramid and the olive.
T F 6. The pontine nuclei (pontine gray) lie rostral to the hypoglossal nucleus and
caudal to the oculomotor nucleus.
T F 7. The inferior olive lies ventral to the dorsal motor nucleus of the vagus and
dorsal to the hypoglossal nucleus.
T F 8. The oculomotor nerve, cerebral peduncles and superior colliculi are all visible
on the ventral surface of the midbrain.
T F 9. The visceromotor nuclei of the cranial nerves generally lie medial to those of
the somatomotor nuclei.
T F 10. The dorsal column nuclei receive direct synaptic input from axons of dorsal
root ganglion cells.
T F 11. The Edinger-Westphal nucleus contributes parasympathetic preganglionic
axons to the oculomotor nerve.
III. FILL IN THE BLANK
For each of the schematic drawings on this and the following pages, depicting transverse
sections through different levels of the brainstem, fill in the appropriate letter for each
of the structures listed below.
A. Caudal medulla
_____ Pyramidal tract (corticospinal tract)
_____ Central canal
B
A
B. Rostral medulla
_____ Inferior olive
_____ Corticospinal tract (pyramidal tract)
_____ Hypoglossal nucleus
_____ Fourth ventricle
_____ Dorsal motor nucleus of the vagus nerve
_____ Inferior cerebellar peduncle
C. Pons
_____ Facial nucleus
_____ Fourth ventricle
_____ Abducens nucleus
_____ Corticospinal tract
_____ Middle cerebellar peduncle
_____ Pontine nuclei
D. Midbrain
_____ Superior colliculus
_____ Cerebral peduncle (crus cerebri)
_____ Red nucleus
_____ Oculomotor nucleus
_____ Oculomotor nerve
_____ Substantia nigra
_____ Cerebral aqueduct
BRAINSTEM AND CRANIAL NERVES
I. Multiple Choice
1.
2.
3.
4.
a, b, c
c
e
c
5.
6.
7.
8.
II. True or False
a, d, e
a, b
a, b, c, d, e
a, c, e
9. a, b, d, e
10. a, e
11. a, c, d
12. c, e
13. b, d
1.
2.
3.
4.
5.
6.
III. Fill in the blanks
A. Caudal Medulla
A Pyramidal (corticospinal) tract)
B Central canal
T
T
T
F
T
T
7. F
8. F
9. F
10. T
11. T
B. Rostral Medulla
H
E
G
C
A
Inferior olive
Corticospinal (pyramidal) tract
Hypoglossal nucleus
Fourth ventricle
Dorsal motor nucleus of the
D
Inferior cerebellar peduncle
vagus
C. Pons
C Facial nucleus
A Fourth ventricle
cerebri)
E Abducens nucleus
B Corticospinal tract
F Middle cerebellar peduncle
D Pontine nuclei
D. Midbrain
E Superior colliculus
D Cerebral peduncle (crus
F
B
A
G
C
Red nucleus
Oculomotor nucleus
Oculomotor nerve
Substantia nigra
Cerebral aqueduct