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Neuro Q2 > Brain Stem > Flashcards

Brain Stem Flashcards

0
Q

Abducens nuclei

A

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

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1
Q

4th ventricle

A

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

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2
Q

Central canal

A

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

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3
Q

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

A

Cerebellum

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4
Q

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

A

Cerebral aqueduct

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5
Q

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

Located in the ventral midbrain

A

Cerebral peduncle

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6
Q

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

A

Cochlear nuclei

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7
Q

Output nuclei from cerebellum

A

Deep cerebellar nuclei

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8
Q

Collective term for fascilatus gracillis and cuneatus

A

Dorsal column

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9
Q

Collection of motor neurons for preganglionic parasympathetic action of CN10.

A

Dorsal motor nucleus of the vagus

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10
Q

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

A

External (lateral) cuneate nuclei

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11
Q

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

A

Facial Nerve CN7

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12
Q

Where is the facial nucleus located?

A

Caudal pons

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13
Q

Tracts conveying well localized touch.

A

Fascilatus gracillis and cutaenus

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14
Q

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

A

Dorsal medial medulla, contains motor neurons for tongue muscles.

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15
Q

What connects the medulla to the cerebellum?

A

Inferior cerebellar peduncle

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16
Q

Nucleus in ventral lateral medulla, contains climbing cerebellar fibers.

A

Inferior olivary nucleus

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17
Q

Fibers arising from the fascilatus cutaenus and gracillis and decussating.

Found in the caudal to mid medulla

A

Internal arcruate fibers

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18
Q

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

A

Lateral geniculate nucleus

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19
Q

Relays auditory signals from the inferior colliculus to the auditory cortex

A

Medial geniculate nucleus

20
Q

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

A

Medial Lemniscus

21
Q

Bundle of neurons involved in coordinating eye movements.

Found near the midline, ventral to the ventricle system.

A

Medial Longitudinal Fascillatus (MLF)

22
Q

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

A

Medullary pyramid

23
Q

Connects basal pons to the cerebellum

A

Middle cerebellar peduncle

24
Q

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

A

Nuclei cutenea and gracillis

25
Q

Visceral sensory nucleus for CN9 and CN10

A

Nucleus Solitarius

26
Q

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

A

Obex

27
Q

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

A

Periaquaductal grey

28
Q

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

A

Pineal gland

29
Q

Where the corticopontine fibers terminate and the ponto cerebellar fibers originate

A

Basal pons

30
Q

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

A

Pulvinar

31
Q

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

A

Pyramidal decussation

32
Q

Serotonin containing nuclei in the midline of brain stem.

A

Raphe nuclei

33
Q

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

A

Red Nucleus

34
Q

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

A

Solitary tract

35
Q

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

A

Spinal nucleus of Trigeminal

36
Q

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

A

Spinal tract of Trigeminal

37
Q

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

A

Substantia Nigra

38
Q

Connection of the cerebellum to the midbrain.

A

Superior cerebellar peduncle

39
Q

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

A

Superior colliculus

40
Q

Portion of the midbrain dorsal to the cerebral aqueduct

A

Tectum

41
Q

The “core” of the brain stem

A

Tegmentum

42
Q

Crossing fibers in the pons for the auditory pathway.

A

Trapezoid

43
Q

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

A

Middle cerebellar peduncle

44
Q

Cheif sensory nucleus from the face

A

Trigeminal nuclei

45
Q

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

A

Ventral regimental area

46
Q

Where do fibers from CN8 terminate?

A

Vestibular nucleus

47
Q

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

A

Inferior colliculus.

Neuro Q2 (10 decks)

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