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Flashcards in Misc. Deck (44)
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1

What is and isn't a part of the lentiform nucleus?

Putamen and globus pallets ARE
Caudate is NOT

2

Which trigeminal nucleus is analogous to the ventral horn of the spinal cord?

trigeminal motor nucleus

3

Which trigeminal nucleus is analogous to the dorsal column nuclei of the spinal somatosensory system?

principal sensory nucleus

4

Which trigeminal nucleus is the site of termination of C and A-delta fibers that descend caudally after entering the brainstem and form the descending root of the trigeminal nerve?

spinal trigeminal nucleus

5

Which trigeminal nucleus is derived from neural crest cells and innervates proprioceptors on the gums and jaw?

mesencephalic trigeminal nucleus

6

Brachiomotor nuclei

innervate striate muscles derived from brachial mesenchyme (neural crest).

Nucleus Ambiguus, Facial nerve (CN7) and TG motor nucleus (CN5)

7

Middle cerebellar peduncle

Information from the cerebral cortex through the pons to the cerebellum

Pons to cerebellum

8

Inferior cerebellar peduncle

Information from the spinal cord to the cerebellum, interconnecting the cerebellum with the vestibular nucleus and inferior olive

9

The crus cerebri (cerebral peduncle) marks the exit point for which cranial nerve?

Oculomotor
ventral border of the midbrain

10

Inferior cerebellar peduncle

conveys spinal cord information to the cerebellum and interconnects the cerebellum with the vestibular nuc. and inferior olive

11

Middle cerebellar peduncle

the route by which information from the cerebral cortex gets to the cerebellum via the pontine nuclei

12

Superior cerebellar peduncle

route by which the cerebellum gets information back to the cerebral cortex (via the thalamus)

Axons originate in dentate nucleus and end in contralateral VA/VL

Also axons originating in interposed nucleus and ending at red nucleus

13

Pyramidal tract lesion symptoms

spastic paralysis

14

Spinothalamic tract lesion symptoms

loss of pain and temperature

15

Dorsal column-medial lemniscus lesion symptoms

loss of 2-pt. discrimination, fine touch, and conscious proprioception

16

spinal trigeminal tract & nucleus

Loss of pain and temp for the head

17

Combined deficit of the pyramidal tract and medial lemniscus likely indicates a lesion where?

Medulla

18

A combined spinothalamic and medial lemniscus type deficit likely indicate a lesion where?

Midbrain

19

AS BM

Alar plate= sensory (lateral)
Basal plate= motor (medial)

20

Branchiomotor nuclei

Innervate striate muscles derived from the branchial mesenchyme (of neural crest origin)

trigeminal motor nucleus, the facial (motor) nucleus and the nuc. ambiguus

21

Where does the corticospinal tract decussate?

Base of medulla

22

Where does the DCML decussate?

mid-medulla

23

Where does the AL or spinothalamic tract decussate?

spinal cord

24

Gag reflex

Afferent= IX sensory fibers
Efferent= X nucleus ambiguous

25

Jaw jerk reflex

Afferent = mesencephalic nucleus of V (stretch receptors in masseter)
Efferent = main motor nucleus of V

26

Corneal blink reflex

Cornea is touched by a foreign object, both eyes blink
Afferent = spinal nucleus of V
Efferent = motor nucleus of VII

27

Pupillary light reflex

Afferent= CN II
Efferent= EW nucleus (III)

28

Facial nerve lesions (UMN signs vs LMN signs)

UMN= top of face is innervated by both sides, so you will only see a deficit on the contralateral lower part of face

LMN= By this pt, no dual innervation, so have entire contralateral hemiparalysis of face

29

Lateral lemniscus

Carries bilateral auditory info

30

Pontine nuclei- where do the axons terminate?

Contralateral cerebellum

Involved in motor coordination