week 4 quiz

Question 1

Name the components of brainstem from rostral to caudal

Answer 1

midbrain-pons-medulla
functions: overall vegetative functions.

Question 2

what are the regions of the brainstem?

Answer 2

tectum-colliculi (Midbrain)
tegmentum-reticular formation-regulates arousal
basis-descending motor tracts

Question 3

what is involved in the ventral midbrain?

Answer 3

motor tracts that relay info from the cerebrum to spinal cord and cerebral peduncles

Question 4

what are the levels of the medulla?

Answer 4

rostral
middle-level of sensory decussation caudal-level of motor decussation

Question 4

what is involved in the dorsal midbrain?

Answer 4

reflex behaviors related to vision and audition
superior colliculli-vision
inferior colliculi-audition

Question 5

what cranial nerve is located on the inferior frontal lobe?

Answer 5

olfactory CNI

Question 5

what cranial nerve is located on the diencephalon?

Answer 5

optic CNII

Question 6

what cranial nerves are located on the midbrain?

Answer 6

CNIII oculomotor-anterior
CNIV-trochlear-posterior

Question 7

what cranial nerves are located on the pons/medulla junction?

Answer 7

CNVI-abducens, CNVII-facial, CNVIII-vestibulocochlear

Question 7

What cranial nerves are located on the pons?

Answer 7

trigeminal CNV

Question 8

What cranial nerves are located on the medulla?

Answer 8

CNIX glossopharyngeal, CNX vagus, CNXI-spinal accessory, CNXII-hypoglossal

Question 9

What cranial nerves are sensory only?

Answer 9

CN I,II,VIII

Question 10

What cranial nerves are motor only?

Answer 10

CN III, IV, VI, XI, XII

Question 11

Where are cell bodies of motor neurons for spinal nerves/cranial nerves located?

Answer 11

Lower motor neurons of spinal nerves are located in spinal cord anterior horn
Lower motor neurons of cranial nerves are located in brainstem nucleii

Question 11

what cranial nerves are mixed?

Answer 11

CN V, VII, IX, X

Question 12

Where are the cell bodies of sensory neurons for spinal nerves/cranial nerves located?

Answer 12

Cell bodies of sensory neurons of spinal nerves are located in dorsal root ganglia
Cell bodies of sensory cranial nerves are located in brainstem ganglia, except for sensory fibers of trigeminal nerve.

Question 13

Which cranial nerves have autonomic parasympathetic functions?

Answer 13

CN III, VII, IX, X

Question 14

Which cranial nerves are involved in speaking?

Answer 14

CN V, VII, IX, X, XII

Question 15

Which cranial nerves are involved in swallowing?

Answer 15

CN V, VII, IX, X, XII

Question 16

What are the distinguishing features that cue you to identify the sections? caudal medulla

Answer 16

Caudal medulla has the crossing fibers (pyramidal decussation) of corticospinal tracts.

Question 17

What are the distinguishing features that orient you to the level of this section? rostral medulla

Answer 17

Appearance of the olives on lateral medulla and caudal portion of 4th ventricle

Question 18

What are the distinguishing features of this level? mid pons

Answer 18

Cerebellar peduncles are clearly seen as are the descending fibers of corticospinal fascicles and crossing fibers to cerebellum.

Question 19

What are the distinguishing features of this level? midbrain

Answer 19

Cerebral peducles, substantia nigra, red nuclei, cerebral aqueduct, periaqueductal gray and colliculi.