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

brainstem - internal anatomy of medulla Flashcards

1
Q

the medulla connects the _____ and the _______

A

pons sup and cervical SC inf

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2
Q

medulla is _____ in shape and ______ superiorly

A

conical shape and broad superiorly

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3
Q

what does the cervicomedullary junction contain

A

pyramidal decussation

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4
Q

cervicomedullary junction is level c ______

A

foramen magnum

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5
Q

the central canal continues upward into ______ and expands as ______

A

lower half of medulla

cavity of 4th vent

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6
Q

what can be found in the ventral surface of the medulla in general

A

anterior median fissure
pyramids
anterior external arcuate fibers
olives

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7
Q

the anterior median fissure is cont c ______

A

anterior median fissure of SC

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8
Q

swelling on each side of median fissure

A

pyramids

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9
Q

the pyramids are bounded lat by _____

A

ventrolateral sulcus

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10
Q

the pyramids carry ______

A

ant/lat corticospinal tracts to SC

corticobulbar fibers in brainstem

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11
Q

Emerge from the anterior median fissure and

A

anterior external arcuate fibers

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12
Q

anterior external arcuate fibers pass laterally over the _____ to enter the ______

A

surface of medulla

enter cerebellum

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13
Q

anterior external arcuate fibers arise from ______

A

arcuate nuclei at base of medulla

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14
Q

arcuate nuclei at base of medulla pass around the _____ to enter ______

A

lateral surface

inferior cerebellar peduncle

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15
Q

olives are _____ to pyramids

A

posterolateral

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16
Q

olives are Oval elevations produced by underlying _____

A

inferior olivary nuclei

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17
Q

________ emerge from groove bet pyramids and olives

A

rootlets of hypoglossal nerve

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18
Q

roots that emerge from the olives

A

Roots of glossopharyngeal, vagus, and rootlets of accessory nerves

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19
Q

_____ are posterior to olives

A

Inferior cerebellar peduncles

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20
Q

inferior cerebellar peduncles connect ______

A

connect medulla to cerebellum

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21
Q

CN from lat olive

A

9,10,11

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22
Q

CN from medial to olive and lat to pyramid

A

12

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23
Q

Posterior surface of the superior of the medulla forms the _____

A

lower part of the floor of
the 4th ventricle

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24
Q

Posterior surface of the inferior half of the
medulla is continuous with

A

posterior aspect

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25
elongated swelling of the posterior median sulcus
gracile tubercle
26
what produces gracile tubercle
gracile nuc
27
found lateral to gracile tub
cuneate tub
28
what produces cuneate tubercle
cuneate nuc
29
4 levels of internal structure of medulla
pyramidal decuss decuss of lemnisci level of olives level just inferior of pons
30
Superiorly, the corticospinal fibers ______
occupy and form the pyramid
31
Inferiorly, about 90% of the fibers decussate and continue down the _______ as _______
lateral funiculus as lateral corticospinal tract
32
other 10% ______
ant corticospinal tracts
33
discuss somatopical organization at level of PD
LE more lat UE med
34
Corticobulbar fibers leave as they descend to project to _____
CN nuc
35
________ continue to ascend superiorly, posterior to the central gray matter
Fasciculus gracilis and fasciculus cuneatus
36
Nucleus gracilis and nucleus cuneatus appear as ______
posterior extensions of the central gray matter
37
Substantia gelatinosa becomes continuous with the ______
inferior end of the nucleus of the spinal tract of trigeminal nerve
38
level of lemnisci decuss aka
Level of sensory decussation
39
spinal nuc of trigeminal nerve is found in _____
Dorsolateral position in medulla; lateral to internal arcuate fibers
40
Spinal tract of trigeminal nerve lies ____
lateral to the nucleus
41
Spinal tract of trigeminal Extends throughout _____ and descends to _______
medulla C3 level of SC
42
Spinal tract of trigeminal continues as _____
caudally with substansia gelatinosa rostrally with main sensory nucleus of trigeminal nerve in pons
43
senses Spinal Tracts and Nucleus of Trigeminal Nerve
Exteroceptive sensation (pain, temperature, light touch) from ipsilateral face
44
found lateral to lemnisci decuss
ant/lat spinothalamic spinotectal
45
tracts found at anterolat region to LD
spinocerebellar vestibulospinal rubrospinal
46
level of olives found ______ to pyramids
Posterolateral to the pyramids
47
Gray matter shaped like crumped bag w/ mouth directed medially
Olivary Nuclear Complex
48
Inferior olivary nucleus gives _____
Principal nucleus, medial accessory olivary nucleus & dorsal accessory olivary nucleus
49
olivary nuc complex is assoc c what movement
w/ voluntary muscle movement
50
Afferent fibers of olivary nuc complex
spino-olivary tracts, cerebellum and cerebral cortex
51
what consists of the vestibular nuc complex
medial inferior lateral superior vestibular nucleus
52
vestibular nuc found at level of olive
medial and inferior vestibular nucleus
53
found on anterolateral aspect of the inferior cerebellar peduncle
Anterior cochlear nucleus
54
found on posterior aspect of peduncle lateral to the floor of the 4th. ventricle
Posterior cochlear nucleus
55
a large motor neuron and found deep in reticular formations
Nucleus Ambiguus
56
fibers of nuc ambiguus join ______
glossopharyngeal, vagus and cranial part of accessory nerve
57
what does nuc ambiguus supply
stylopharyngeus (IX); pharyngeal muscles for swallowing and laryngeal muscles (X SVE IX and X
58
from medial to lateral give the structures that are found at level of olives
hypoglossal nuc dorsal nuc of vagus nuc of tractus solitarius median and inf vestibular nuc
59
recieves afferent from cerebral cort and sends efferent to cerebellum and through what
Arcuate nuclei - anterior external arcuate fibers
60
what does arcuate nuc control
controls breathing
61
Flattened tract on each side of the midline posterior to the pyramid
Medial lemniscus
62
medial lemn Fibers emerge from the decussation of the ______ and send afferents to ______
lemnisci and thalamus
63
found on posterolateral corner of level of olives
Inferior Cerebellar Peduncle
64
Small tract on each side of the midline posterior to the medial lemniscus and anterior to the hypoglossal nucleus
Medial Longitudinal Fasciculus
65
Medial Longitudinal Fasciculus is responisble for what
(CN III, IV, and VI) to each other and to the vestibular nuclei for conjugate eye movement
66
found on Anteromedial aspect of inferior cerebellar peduncle
Spinal Tract and Nucleus of Trigeminal Nerve
67
In between inferior olivary nucleus and nucleus of spinal tract of trigeminal nerve
Anterior spinocerebellar Tract
68
Diffuse mixture of nerve fibers and cells, deeply placed posterior to the olivary nucleus
Reticular Formation
69
emerges between olives and inferior cerebellar peduncles inferior to pons
Glossopharyngeal, vagus, and cranial part of accessory nerves
70
Emerge between the pyramids and olives jus inferior to pons
Hypoglossal Nerve
71
Forms a distinct bundle at about the mid-olivary level
Inferior Cerebellar Peduncle (restiform body)
72
inferior cerebellar ped carry _____
inputs to cerebellum from spinal cord
73
tracts within inferior cerebellar peduncle
Olivocerebellar tract Dorsal spinocerebellar tract Reticulocerebellar tract Cuneocerebellar tract Arcuatocerebellar tract Cerebello-olivary tract Trigeminocerebellar tract Fibers from perihypoglossal nuclei
74
small inner (medial) part of the restiform body
juxtarestiform body
75
tracts with in juxtarestiform body
Cerebelloreticular tract Cerebellovestibular tract Vestibulocerebellar, secondary vestibular fiber Direct vestibular nerve fibers to the cerebellum Cerebellospinal tract
76

neuro 2nd shift (21 decks)

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