Brain Stem

Question 0

Abducens nuclei

Answer 0

A nucleus in the dorsal medial portion of the caudal pons near the MLF. Motor neurons of Abducens nerve originate here

Question 1

4th ventricle

Answer 1

Part of the ventricle system located dorsal to the brain stem from the mid medulla through pons.

Question 2

Central canal

Answer 2

Canal at the center of the brain stem connecting the 4th ventricle at the obex to the medulla

Question 3

Region comprised of dorsal deep nuclei dorsal to the brain stem. Involved in coordinating voluntary movement.

Answer 3

Cerebellum

Question 4

Path through the mid brain connecting the third and fourth ventricle.

Answer 4

Cerebral aqueduct

Question 5

Composed of cerebral cortical efferent projections to the brain stem (corticobulbar) and spinal cord (corticospinal).

Located in the ventral midbrain

Answer 5

Cerebral peduncle

Question 6

Site of termination of auditory nerve fibers of CN8 and the first relay nucleus in the auditory pathway.

Located at inferior cerebelarl peduncle at the ponto - mesocephalic junction

Answer 6

Cochlear nuclei

Question 7

Output nuclei from cerebellum

Answer 7

Deep cerebellar nuclei

Question 8

Collective term for fascilatus gracillis and cuneatus

Answer 8

Dorsal column

Question 9

Collection of motor neurons for preganglionic parasympathetic action of CN10.

Answer 9

Dorsal motor nucleus of the vagus

Question 10

Nucleus lateral to the nucleus cuneatus and coordinates proprioception of the extremities.

Answer 10

External (lateral) cuneate nuclei

Question 11

Genu (bends) around the Abducens nucleus in the base of the 4th ventricle.

Answer 11

Facial Nerve CN7

Question 12

Where is the facial nucleus located?

Answer 12

Caudal pons

Question 13

Tracts conveying well localized touch.

Answer 13

Fascilatus gracillis and cutaenus

Question 14

Where is the hypoglossal nucleus and what type of fibers does it contain?

Answer 14

Dorsal medial medulla, contains motor neurons for tongue muscles.

Question 15

What connects the medulla to the cerebellum?

Answer 15

Inferior cerebellar peduncle

Question 16

Nucleus in ventral lateral medulla, contains climbing cerebellar fibers.

Answer 16

Inferior olivary nucleus

Question 17

Fibers arising from the fascilatus cutaenus and gracillis and decussating.

Found in the caudal to mid medulla

Answer 17

Internal arcruate fibers

Question 18

Termination of the optic tract in the caudal part of the thalamus.

Answer 18

Lateral geniculate nucleus

Question 19

Relays auditory signals from the inferior colliculus to the auditory cortex

Answer 19

Medial geniculate nucleus

Question 20

Continuation of sensory axons from the dorsal columns.it conveys dorsal column sensations rostrally through the brain stem to the thalamus.

Answer 20

Medial Lemniscus

Question 21

Bundle of neurons involved in coordinating eye movements.

Found near the midline, ventral to the ventricle system.

Answer 21

Medial Longitudinal Fascillatus (MLF)

Question 22

Fiber bundle in ventral medulla, important for coordinating movements in contra lateral limb

Answer 22

Medullary pyramid

Question 23

Connects basal pons to the cerebellum

Answer 23

Middle cerebellar peduncle

Question 24

Nuclei in the caudal medulla for termination of the Fascillatus gracillis and cutenea . Relay for well localized touch and pressure.

Answer 24

Nuclei cutenea and gracillis

Question 25

Visceral sensory nucleus for CN9 and CN10

Answer 25

Nucleus Solitarius

Question 26

Where the central canal opens up into the 4th ventricle.

Answer 26

Obex

Question 27

Nucleus surrounding the cerebral aqueduct containing endogenous opiate neurons and controls descending pain suppression pathways.

Answer 27

Periaquaductal grey

Question 28

Involved in circadian secretion of melatonin, located dorsal to the midbrain.

Answer 28

Pineal gland

Question 29

Where the corticopontine fibers terminate and the ponto cerebellar fibers originate

Answer 29

Basal pons

Question 30

Large posterior portion of the thalamus that forms a bulbous projection.

Answer 30

Pulvinar

Question 31

Crossing site of the corticospinal tracts and marks the junction of the brain stem and spinal cord

Answer 31

Pyramidal decussation

Question 32

Serotonin containing nuclei in the midline of brain stem.

Answer 32

Raphe nuclei

Question 33

Origin of the rubospinal tract and projections to the inferior olivary nuclei.

Answer 33

Red Nucleus

Question 34

Tract in the dorsal medulla that distributes visceral sensory fibers of vagus and Glossopharyngeal nerves to the proper location in snickers Solitarius

Answer 34

Solitary tract

Question 35

Long nucleus of the lateral brain stem that is the termination of pain and temperature fibers of CN5.

Answer 35

Spinal nucleus of Trigeminal

Question 36

A collection of temperature and pain sensory fibers of the Trigeminal running causally in the lateral medulla

Answer 36

Spinal tract of Trigeminal

Question 37

Large nucleus of the midbrain located just dorsal to the crus cerebri.

Answer 37

Substantia Nigra

Question 38

Connection of the cerebellum to the midbrain.

Answer 38

Superior cerebellar peduncle

Question 39

Nucleus that is involved in reflexes and directing eyes to novel stimuli.

Answer 39

Superior colliculus

Question 40

Portion of the midbrain dorsal to the cerebral aqueduct

Answer 40

Tectum

Question 41

The "core" of the brain stem

Answer 41

Tegmentum

Question 42

Crossing fibers in the pons for the auditory pathway.

Answer 42

Trapezoid

Question 43

What structure does the Trigeminal nerve pass through in the mid pons?

Answer 43

Middle cerebellar peduncle

Question 44

Cheif sensory nucleus from the face

Answer 44

Trigeminal nuclei

Question 45

A region of dopaminergic receptors in the ventral midbrain. Major dopamine source

Answer 45

Ventral regimental area

Question 46

Where do fibers from CN8 terminate?

Answer 46

Vestibular nucleus

Question 47

Relay for auditory stimuli. Located dorsal to cerebral aqueduct (in tectum).

Answer 47

Inferior colliculus.