Neuroanatomy Lab 2: Details Of The Brainstem.

Front 1

Which cranial nerves exit the Medulla Oblongata?

Back 1

CN IX, X, XI, XII.

Front 2

What cranial nerve is indicated by the orange arrow?

Back 2

CN IX, the Glossopharyngeal Nerve.

Front 3

What cranial nerve is indicated by the orange arrow?

Back 3

CN X, the Vagus Nerve.

Front 4

What cranial nerve is indicated by the orange arrow?

Back 4

CN XI, the Spinal Accessory Nerve.

Front 5

What cranial nerve is indicated by the orange arrow?

Back 5

The Trigeminal Nerve, CN V

Front 6

What cranial nerve is indicated by the orange arrow?

Back 6

CN IV, the Abducens Nerve

Front 7

What is the function of the Glossopharyngeal Nerve (CN IX)?

Back 7

CN IX conveys general and taste sensation from the posterior 1/3 of the tongue, and innervates the pharyngeal muscles and the parotid gland.

Front 8

Where does CN IX exit the brainstem?

Back 8

The Glossopharyngeal Nerve exits the Medulla Oblongata just caudal to its junction with the Pons and dorsal to the Inferior Olive.

Front 9

Which cranial nerves exit the Pons?

Back 9

CNs V, VI, VII, VIII.

Front 10

Which cranial nerves exit the Mesencephalon?

Back 10

CNs III, IV

Front 11

What structure is indicated by the blue arrow?

Back 11

The Basilar Pons (or just pons)

Front 12

What does the anterior surface of the Pons consist of?

Back 12

Transversely arranged fibers which arise as axons of neurons in the pontine nuclei.

Front 13

What structure is indicated by the blue arrow?

Back 13

The Vagal Trigone

Front 14

What structure is indicated by the blue arrow?

Back 14

The Hypoglossal Trigone

Front 15

What structure is indicated by the blue arrow?

Back 15

The Decussation of the Pyramids

Front 16

What structure is indicated by the blue arrow?

Back 16

The Olive

Front 17

What structure is indicated by the blue arrow?

Back 17

An Inferior Cerebellar Peduncle.

It's located adjacent to the fourth ventricle and projects into the cerebellum.

Front 18

What are the Inferior Cerebellar Peduncles composed of?

Back 18

They consist chiefly, but not exclusively, of pathways afferent to the cerebellum.

Front 19

What structure is indicated by the blue arrow?

Back 19

The Nucleus Gracilis (Gracile Tubercle)

Front 20

What structure is indicated by the blue arrow?

Back 20

The Fasciculus Gracilis

Front 21

What information is carried by the fasciculi gracilis and cuneatus?

Back 21

They transfer information concerning proprioception, fine touch and vibration sense.

Front 22

What structure is indicated by the blue arrow?

Back 22

The Fasciculus Cuneatus

Front 23

What structure is indicated by the blue arrow?

Back 23

The Nucleus Cuneatus (Cuneate Tubercle)

Front 24

What nerve is indicated by the blue arrow?

Back 24

The Trigeminal Nerve (CN V)

Front 25

Where does CN V arise?

Back 25

From the region where the fibers of the Basilar Pons become continuous with the Middle Cerebellar Peduncle.

Front 26

What does CN V supply?

Back 26

It supplies motor innervation to the muscles of mastication and sensory innervation to the structures of the face and mouth.

Front 27

What nerve is indicated by the blue arrow?

Back 27

The Abducens Nerve (CN VI)

Front 28

What nerve is indicated by the blue arrow?

Back 28

The Facial Nerve (CN VII)

Front 29

What nerve is indicated by the blue arrow?

Back 29

The Vestibulo-cochlear Nerve (CN VIII) (also called the Auditory Nerve)

Front 30

What nerve is indicated by the blue arrow?

Back 30

The Oculomotor Nerve (CN III)

Front 31

What nerve is indicated by the blue arrow?

Back 31

The Trochlear Nerve (CN IV)

Front 32

What nerve is indicated by the blue arrow?

Back 32

The Trochlear Nerve (CN IV)

Front 33

What structure is indicated by the blue arrow?

What is it involved with?

Back 33

One of the Superior Colliculi of the Corpora Quadrigemina.

It's involved with mediating visual reflexes.

Front 34

What structure is indicated by the blue arrow?

What is it involved in?

Back 34

One of the Inferior Colliculi.

It is involved with the auditory pathway.

Front 35

What is the function of the Abducens Nerve?

Back 35

It provides motor innervation to the lateral rectus muscle of the eye.

Front 36

What structure is indicated by the blue arrow?

Back 36

The Facial Colliculus.

Front 37

What does the Facial Nerve innervate?

Back 37

It provides taste to the anterior 2/3 of the tongue and motor innervation to the muscles of facial expression (among other things).

Front 38

What is the function of the Vestibulocochlear Nerve?

Back 38

The Vestibular Root conveys information of balance and the position of the head.
The Cochlear Root mediates hearing.

Front 39

What area is indicated by the blue arrow?

Why is it important?

Back 39

The Vestibular Area

It overlies the location of the vestibular nuclei.

Front 40

What structure is indicated by the blue arrow?

What does it do?

Back 40

The Middle Cerebellar Peduncle

It conveys information to the cerebellum derived from the cerebral cortex.

Front 41

What structure is indicated by the blue arrow?

Back 41

The Superior Cerebellar Peduncle

Front 42

What type of information is carried on the Superior Cerebellar Peduncle?

Back 42

It largely carries efferent fibers from the Cerebellum.