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NYCC Neuro 1 > Midbrain > Flashcards

Midbrain Flashcards

1
Q

Divisions of midbrain

A
  • Tectum: posterior to cerebral aqueduct
  • Cerebral Peduncle: anterior to cerebral aqueduct
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2
Q

Define periaqueductal gray

A

Grey matter around the aqueduct

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3
Q

Periaqueductal gray is excited by ____ and excites the…

A

Encephalines & other opiates
Raphe nuclei of reticular formation

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4
Q

Raphe nuclei are ____ and send fibers to the spinal cord to ____

A

Serotoninergic
Suppress pain

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5
Q

Corpora quadrogemina

A

Tectum contains 2 superior & 2 inferior colliculi

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6
Q

Inferior colliculus is part of the ____

A

Auditory pathway

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7
Q

Inferior colliculus receives afferents from the ____

A

Lateral Lemniscus

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8
Q

Inferior colliculus sends efferents to the ____ via…

A

Medial geniculate body via inferior brachium

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9
Q

Superior colliculus receives afferents from the ____ via the ____

A

Optic tract via the superior brachium

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10
Q

Superior colliculus sends efferents to the edinger-Westphal nucleus for ____

A

Pupillary constriction

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11
Q

Cerebral peduncle is composed of…

A

Tegmentum of midbrain
Substantia nigra
Crus cerebri

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12
Q

What is the space between the 2 cerebral peduncles?

A

Interpeduncular fossa

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13
Q

What is the posterior wall of the Interpeduncular fossa?

A

Posterior perforated substance

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14
Q

At level of inferior colliculus, tegmentum of midbrain contains….

A

Decussation of superior cerebellar peduncles

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15
Q

At level of inferior colliculus, superior cerebellar fibers are…

A

Ascending from dentate nucleus, cross & head toward red nucleus

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16
Q

At Level of superior colliculus, tegmentum of midbrain contains the ____

A

Red nucleus

17
Q

Subdivisions of Substantia nigra

A

Pars compacta
Pars reticulata

18
Q

Pars compacta

A

Dopaminergic nucleus of basal ganglia involved in motion & addictive behaviour

19
Q

Pars reticulata

A

GABAergic nucleus of basal ganglia involved in motion

20
Q

Pathologic decrease of ____ in Substantia nigra is seen in ____

A

Dopamine
Parkinson’s disease

21
Q

Antipsychotic meds used to treat symptoms of schizophrenia & bipolar are _____

A

Dopamine antagonists

22
Q

Crus cerebri contains ____ in its medial 3/5

A

Corticospinal fibers

23
Q

Medial & lateral fifths of crus cerebri hold ____ and ____ fibers on their way to the ____

A

Frontopontine & temporopontine fibers
Pontine nuclei

24
Q

CN VI extraocular muscles

A

Lateral rectus

25
Q

CN IV extraocular muscles

A

Superior oblique (down & in)

26
Q

CN III extraocular muscles

A

Medial rectus
Inferior rectus (down & out)
Superior rectus (up & out)
Inferior oblique (up & in)

NYCC Neuro 1 (20 decks)

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