Exam 1 Crash Course Deck

Question 1

When depolarized photoreceptors relay information to bipolar cells by synapsing in the
outer plexiform layer. Bipolar cell bodies are found in the
____________________ layer

Answer 1

Inner Nuclear

Question 2

Bipolar cells relay information to ganglion cells. The synapse occurs in the
__________________ layer.

Answer 2

Inner plexiform

Question 3

CN II: Axons from ganglion cells are conveyed in the nerve fiber layer toward the _______________?

Answer 3

optic disc

Question 4

Optic nerve axons are mylinated by what structures?

Answer 4

interfascicular oligodendrocytes

Question 5

7. The optic tract travels around the ______________ and fibers synapse on one of three nuclei of termination.

Answer 5

cerebral peduncles

Question 6

Optic Tracts 3 nuclei of termination are?

Answer 6

lateral geniculate body
superior colliculus
pretectal nucleus of the midbrain

Question 7

From the lateral geniculate body the termination reaches _______________.

Answer 7

cerebral cortex in the occipital lobe (Brodmann area 17)

Question 8

From the superior colliculus the termination reaches _______________.

Answer 8

tectospinal tract

Question 9

From the pretectal nucleus of midbrain deal with _______________.

Answer 9

light reflexes

Question 10

nuclei of origin for Oculomotor nerve

Answer 10

Oculomotor nuclei

Question 11

where is the oculomotor nuclei is located?

Answer 11

in periaqueductal gray matter,
anterior to cerebral aqueduct,
at the level of the superior colliculi

Question 12

What part of the cerebral cortex sends axons TO the oculomotor nuclei?

Answer 12

Broadmann area 8

Question 13

The oculomotor nuclei also receives fibers from the which two structures?

Answer 13

Superior Colliculus

Medial Longitudinal Fasciculus (MLF)

Question 14

Oculomotor axons travel anteriorly, through which structure?

Answer 14

Red Nucleus

Question 15

Oculomotor axons exit CNS in through what structure?

Answer 15

Interpeduncular fossa (into the cistern)

Question 16

Once in the eye socket, the oculomotor nerve splits into what two structures?

Answer 16

Superior and Inferior Rami

Question 17

What muscles do the superior rami of the oculomotor nerve innervate?

Answer 17

superior rectus

levator palpebrae superioris

Question 18

What muscles do the inferior rami of the oculomotor nerve innervate?

Answer 18

medial rectus
inferior rectus
inferior oblique

Question 19

The accessory oculomotor nucleus has preganglionic parasympathetics, what is the other name for the accessory oculomotor

Answer 19

Edinger-Westphal Nucleus

Question 20

Axons from the accessory oculomotor follow the Inferior Rami and synapses on what ganglion?

Answer 20

Ciliary ganglion

Question 21

Postganlionic parasympathetic axons pierce the sclera and supply which structures?

Answer 21

Ciliaris

Pupillary constrictor

Question 22

Nerves leaving the ciliary ganglion also carry

sympathetic and somatic sensory fibers from which nerve?

Answer 22

ophthalmic nerve; do not synapse

Question 23

The Trochlear nucleus gives rise to lower motor neurons that cross at which point?

Answer 23

the midbrain

inferior to the inferior colliculi

Question 24

The trochlear nucleus also receives fibers from which three structures?

Answer 24

superior colliculus
medial longitudinal fasciculus
Broadmann area 8

Question 25

Communication with cavernous plexus and the trochlear nerve with what type of fibers?

Answer 25

Postganglionic sympathetic fibers

Question 26

The trochlea pulley occurs where in the orbit?

Answer 26

Superior Medial aspect

Question 27

abducens nucleus is located where in relation to the pons?

Answer 27

caudal part of the pons | at the floor of the rhomboid fossa

Question 28

abducens nerve receives information from what structures?

Answer 28

superior colliculus medial longitudinal fasciculus Broadmann area 8

Question 29

abducens nerve penetrates the dura, traveling along which structure before passing through the Superior Orbital Fissure?

Answer 29

along the Cavernous Sinus