Pons Flashcards

1
Q

Anterior part of pons

A

Basal part

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2
Q

Posterior part of pons

A

Pontine tegmentum

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3
Q

What structure divides anterior and posterior pary of pons?

A

Trapezoid body.

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4
Q

Anterior to cerebellum

A

Pons

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5
Q

Connects midbrain and medulla

A

Pons

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6
Q

Transverse collection of fibres on each side of anterior surface of pons

A

Middle cerebellar peduncle

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7
Q

Shallow groove on anterior aspect of pons.

A

Basilar groove. Holds basilar artery

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8
Q

Cranial nerve emerging on anterolateral surface of pons.

A

Trigeminal nerve

A pair, each with a small medial motor part and a large lateral sensory part

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9
Q

What cranial nerves emerge In the groove between pons and medulla

A

F- facial
A-Abduscens
V-Vestibulochoclear

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10
Q

What forms upper half of 4th ventricle?

A

Posterior surface of pons

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11
Q

The posterolateral aspect of poms blocked by

A

Superior cerebellar peduncles

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12
Q

Posterior pons divided into symmetrical halves by?

A

Median sulcus

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13
Q

Lateral to median sulcus?

A

Medial eminence

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14
Q

Lateral to medial eminence

A

Sulcus limitans

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15
Q

Inferior end of medial eminence expanded to form

A

Facial colliculus produce by root of facial nerve winding around nuclues of abduscens nerve

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16
Q

Floor of superior part of sulcus limitans

A

Substantia ferruginea which is dark in color due to deeply pigmnted nerve cells

17
Q

Lateral to sulcus limitans

A

Area vestibuli

18
Q

Trigeminal nuclei location in brainstem

A

Present in pons

19
Q

Posterior to the lateral part of medial lemniscus

A

Facial nucleus

20
Q

Location of medial longitudinal fasciculus

A

Beneath floor of 4th ventricle

21
Q

The medial vestibular nucleus is lateral to

A

Abducens nucleus and close to imferior cerebellar peduncles

22
Q

Lying in the anteromedial aspect of inferior cerebellar peduncles

A

Spinal nucleus of trigemminal nerve and its tract

23
Q

What makes up trapezoid body

A

Fibres from cochlear nuclei

Nuclei of trapezoid body

24
Q

Basilar part of pons contains

A

Pontine nuclei
corticopontine fibres of crus ceribri of midbrain terminate here

Axons of thee fibres give rise to transverse fibres of pons which enter middle cerebellar peduncles and forms main pathway linking cerebellum to cortex

25
Q

Cranial nerves from pons

A

Trigeminal
Facial
Abduscena
Vestibulocochlear

26
Q

Location of motor nucleus of trigeminal nerve

A

Beneath lateral part of 4th ventricle

Within reticular formation

27
Q

Location pf sensory nucleus of trigemminal nerve

A

Lateral side of motor nucleus

28
Q

Posterolateral to motor nucleus of trigeminal nerve

A

Superior cerebellar peduncle

29
Q

Common at both facial and trigemmin nuclei level

A

Reticular formation
Fourth ventricle
Pontine nuclei
Trapezoid nuclei

30
Q

Nuclei at facial colliculus

A
Facial nuclei
Abduscens nuclei
Medial vestibular nucleus
Spinal nucleus of trigemminal nerve
Pontine nuclei
Trigemminal nuclei
31
Q

Nuclei at trigemminal nucleus level

A

Main sensory and motor nucleus
Nucleus of trigemminal nerve
Pontine and trapezoid nuclei

32
Q

Motor tracts same in facial and trigemminal levels

A

Corticospinal
Corticonuclear
Transverse pontine
Medial longitudianl fascicullus

33
Q

Sensory tracts of facial colliculus

A

Spinal tract of trigeminal nerve

Lateral spinal and medial lemnisci

34
Q

Sensory tracts at trigemminal level

A

Lateral spinal and medial lemnisci