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neuro 2nd shift > brainstem - internal anatomy of midbrain > Flashcards

brainstem - internal anatomy of midbrain Flashcards

1
Q

midbrains connects _____

A

pons and cerebellum with the
forebrain

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2
Q

what is tentorial notch

A

butas sa tentorium cerebelli where brainstem and SC passes through

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3
Q

the midbrain is transversed by ______

A

cerebral aqueduct

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4
Q

what can be found at anterior inferior surface of midbrain

A

divergence the cerebral
peduncles

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5
Q

what exits interpeduncular fossa

A

oculomotor
nerve (cranial nerve III)

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6
Q

emerges from the dorsal aspect, curves around, and appears at the lateral borders of the cerebral peduncles

A

Trochlear nerve (cranial nerve IV)

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7
Q

passes under the cerebral peduncles before the peduncles disappear into the substance of the cerebral hemisphere

A

optic tract

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8
Q

what can be found at post midbrain

A

Corpora quadrigemina (Quadrigeminal plates)

Trochlear nerve

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9
Q

what divides quadrigeminal plates

A

vertical and transverse groove

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10
Q

found on lat surface of midbrain

A

sup and inferior brachium

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11
Q

Pass from superior colliculus to lateral geniculate body and the optic tract

A

sup brachium - optic

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12
Q

Connects the inferior colliculus to the medial geniculate body

A

Inferior Brachium - auditory

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13
Q

fiber tracts that runs from basis

A

Crus cerebri

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14
Q

posterior to the cerebral aqueduct; contains superior and inferior colliculi

A

tectum

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15
Q

part of auditory pathway that Receives terminal fibers of lateral lemniscus

A

inferior Colliculus

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16
Q

Emerging fibers pass laterally and posteriorly around the central gray and exit just below the inferior colliculi

A

Trochlear Nucleus

17
Q

found Lateral to the cerebral aqueduct

A

Mesencephalic Nuclei of Trigeminal Nerve

18
Q

Central part of the tegmentum anterior to the cerebral aqueduct

A

Decussation of the superior cerebellar peduncles

19
Q

found Lateral to decussation

A

Reticular Formation

20
Q

Ascends posterior to the substantia nigra

A

Medial lemniscus

21
Q

found Posterior to medial lemniscus

A

Spinal and Trigeminal lemnisci

22
Q

found Posterior to trigeminal lemniscus

A

Lateral lemniscus

23
Q

Large motor nucleus between
tegmentum and crus cerebri

A

substantia nigra

24
Q

substantia nigra is concerned c _____

A

muscle tone

25
Q

Connect the cerebral cortex to anterior horn of spinal cord, cranial nerve nuclei, pons and cerebellum

A

Crus cerebri

26
Q

Large nucleus that is part of the visual reflexes

A

Superior Colliculus

27
Q

sup colli Receives afferents from ______

A

optic nerve, visual cortex, and spinotectal tract

28
Q

sup colli Receives efferents from ______

A

tectospinal and tectobulbar tracts - responsible for the reflex movement of eyes, head, and neck

29
Q

afferent pathway for the light reflex ends in the ______

A

pretectal nucleus - contriction of pupils

30
Q

Small group of neurons close to the lateral part of the superior colliculus

A

pretectal nucleus

31
Q

After relaying in the pretectal nucleus, the fibers pass to the _______

A

PSY nucleus of oculomotor nerve (Edinger-Westphal nucleus)

32
Q

Situated in the central gray matter close to the median plane, just posterior to the MLF

A

Oculomotor nuc

33
Q

Rounded mass between the cerebral aqueduct and substantia nigra

A

Red Nucleus

34
Q

afferents of red nuc

A

corticospinal fibers

superior cerebellar peduncle

Lentiform
subthalamic
hypothalamic
nuc

substantia nigra and spinal cord

35
Q

efferents of red nuc

A

rubrospinal tract

rubroreticular tract

thalamus

substantia nigra

36
Q

Mainly carries output from the cerebellum

A

Superior Cerebellar Peduncle

37
Q

Superior Cerebellar Peduncle decussates at level of ______

A

inferior colliculi at the midbrain

neuro 2nd shift (21 decks)

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