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Neuroscience > Midbrain & Pons > Flashcards

Midbrain & Pons Flashcards

1
Q

Imaginary line from inferior pontine sulcus to the fastigium

Widest diameter of the 4th ventricle

A

Pontomedullary junction

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2
Q

Tectum in pons

A

Superior medullary velum

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3
Q

All nuclei are found the pons tegmentum except

A

Pontine nuclei (located in the pons basis)

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4
Q

Single bundle of transversely coursing pontocerebellar fibes

A

Middle Cerebellar Peduncle or Brachium Pontis

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5
Q

Connects spinal cord and medulla to cerebellum

A

Inferior Cerebellar Peduncle

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6
Q

Primarily efferent from the cerebellum to the midbrain and thalamus

A

Superior Cerebellar Peduncle

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7
Q

Caudal limit of pons dorsally

A

Stria medullaris of the fourth ventricle

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8
Q

Rostral limit of pons dorsally

A

Exiting of trochlear nerve

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9
Q

Separates pons basis and tegmentum

A

Trapezoid bodies

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10
Q

Terminates at pontine nuclei

Sends pontocerebellar fibers to cerebellum

A

Corticopontine tract

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11
Q

Decussation of corticospinal tract

A

Lower 1/3 of medulla

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12
Q

Auditory relay nucleus

A

Superior olives

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13
Q

Principal ascending auditory pathway

A

Lateral lemniscus

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14
Q

Prominent bulge overlying the abducens nucleus and genu of facial nerve

A

Facial colliculus

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15
Q

Major source of norepinephrine in CNS

A

Locus cereleus

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16
Q

Unconscious proprioception of the face

Jaw jerk reflex

A

Mesencephalic nucleus of CN V

17
Q

Unconscious proprioception in upper limbs

A

Dorsal nucleus of Clarke

18
Q

Function of Abducens nucleus (most medial)

A

Moves eye laterally

19
Q

True or false

Cochlear nerve conveys auditory information from only ONE ear

A

True

It is the lateral lemniscus that conveys from BOTH ears

20
Q

Lesion in cochlear nerve

A

Complete ipsilateral deafness

21
Q

Lesion in lateral lemniscus

A

Bilateral deafness more on contralateral but partial

22
Q

Parts of brainstem involved in pain modulation

A

Nucleus Raphe Magnus
Locus Ceruleus
Periaqueductal Gray

23
Q

Most ventral of the midbrain tegmentum

A

Substantia Nigra

Neuroscience (3 decks)

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