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Neuroanatomy Lab > S6: Internal and External Anatomy of the Pons > Flashcards

S6: Internal and External Anatomy of the Pons Flashcards

1
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Middle Cerebellar Peduncles

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2
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CN 5

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3
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CN 6

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4
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CN 7

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5
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Superior Cerebellar Peduncles

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6
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basis of the pons

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7
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16

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facial colliculus

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8
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vestibular area

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9
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pontine tegmentum

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10
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Abduscens nuclei

supplied by: perforating branches of basilar

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11
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Facial Nerve

supplied by anterior inferior cerebral a.

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12
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medial lemniscus

supplied by mostly branches from the basilar

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13
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lateral lemniscus

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14
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Superior olive

supplied by AICA ?

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15
Q
A

Vestibular nulcei

supplied by AICA

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16
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A

Medial longitudinal fascilus

supplied by perforating basilar a.

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17
Q
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Paramedian Pontine Reticular formation

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18
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Rubrospinal tract

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19
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ALS

supplied by AICA

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20
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Spinal n. of trigem.

supplied by AICA

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21
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Spinal tract of trigem.

supplied by aica

22
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inferior cerebellar peduncle

23
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superior cerebellar peduncle

24
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corticospinal tract

supplied by perforating branches of basilar

25
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middle cerebellar peduncle

26
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medial lemniscus

27
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rubrospinal tract

28
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ALS

29
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Motor nucleus of trigem

supplied by AICA

function: somatosensory for head and neck and motor jaw muscles
pathology: numbness in head and neck on SAME SIDE

weakened chewing

sensory loss elsiminating corneal reflexing -> irritated cornea

30
Q
A

principal sensory of trigem.

function: epicritic from head and neck
pathology: reduced 2 point tactile, fibration, position sense on SAME SIDE of head

31
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A

CN 5: Trigem

function: somatosensory for head and neck, motor for jaw
pathology: numbness in head and neck on the same side, weakened chewing, sensory loss eliminates corneal reflex resulting in irritated cornea

32
Q
A

lateral lemniscus

function: hearing
pathology: no obvious pathology (from unilateral X)

33
Q
A

Superior olive

function: hearing, particularly in locating the source of sound

pathology:

unilateral - nothing, due to bilaterality of auditory pathway

34
Q
A

Decussation of the trapezoid body

function: 1. somatosensory for trunk and limbs (medial lemniscus)
2. autditory: crossing lateral lemniscus fibers

pathology:

  1. loss of epicritic sense for trunk and limbs
  2. no obvious hearing loss
35
Q
A

Locus Ceruleus

function: main source of Norepeinphrine, motor control and sleep; adjusts muscle tone during rem

Pathology: prevents collapse of tone during REM (in cats…), implicated in parinksonism

36
Q
A

Medial longitduinal fasiculus

function: coordinates head and eye position
pathology: itnernuclear opthalmoplegia; contralateral eye cannot adduct for conjugate gaze shift but can adduct during convergence

37
Q
A

pontine nuclei

38
Q
A

Medial longitudinal fasciculus

function: coordinates head and eye position
pathology: contralateral eye cannot adduct for conjugate gaze shift, can adduct during convergence

39
Q
A

locus ceruleus

function: main source of norepeinhrpine; motor control and sleep; adjusts muscle tone during REM
pathology: implicated in parinksoniasm, prevents collapse of tone during REM sleep

40
Q
A

superior cerebellar peduncle

pathology: cerebellar signs: ataxia, intention tremor
connections: o carries most of cerebellums output to other parts of the brain

• main ouput:
 areas of pontine reticular formation
 red nucleus in the midbrain
 ventral anterior and ventral alteral nucleus in the thalamus -> precentral gyrus and premotor cortex

41
Q
A

medial lemniscus

function: epicritic somatosensory for trunks and limbs on OPPOSITE SIDE
pathology: loss of 2 point, vibration, position sense, asterogonosis, shuffling gait etc.

42
Q
A

crus cerebri

function:

cortical control of movement and some descending gating of sensory signals

pathology: 1. loss of indepdent finger movement
2. slowed rxn times
3. slight weakness

43
Q
A

lateral lemniscus

function: hearing
pathology: no obvious sx from unilateral X

44
Q
A

Corticospinal tract

function: motor contorl from cortex to motor neurons of CN and ventral horn

isolated pathology: loss of indepdent finger control, slowed rxn times

45
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facial nculeus

46
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superior cerebellar peduncle

47
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dentate nucleus

48
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inferior cerebellar peduncle

49
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middle cerebellar peduncle

50
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Neuroanatomy Lab (36 decks)

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