03a: CNS Overview and CNs Flashcards Preview

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Flashcards in 03a: CNS Overview and CNs Deck (50):
1

List the divisions of the brain, from rostral to caudal

1. Telencephalon
2. Diencephalon
3. Mesencephalon
4. Metencephalon
5. Myelencephalon

2

The caudal myelenecephalon is (smaller/larger) than SC. The rostral myelencephalon has (X) on its (anterior/posterior/lateral) aspect to add to its size.

Same size;
X = inferior olivary nucleus
Lateral

3

(Rostral/caudal) (X) brain division contains The Pyramids, which are (ventral/lateral/dorsal) bundles of (Y).

Both rostral and caudal;
X = myelencephalon
Ventral;
Y = white matter

4

The metencephalon consists of:

Pons and Cerebellum

5

Caudal mesencephalon consists of:

Inferior colliculus

6

Rostral mesencephalon consists of:

Superior colliculus

7

Which brain division contains the cerebral peduncles?

Mesencephalon

8

Roof of mesencephalon collectively called (X) and floor formally called (Y).

X = tectum
Y = tegmentum

9

Diencephalon consists of:

Thalamus and hypothalamus

10

Telencephalon consists of:

Cerebrum, basal ganglia, hippocampus, amygdala

11

Location of CSF travel in telencephalon.

Lateral ventricles

12

Location of CSF travel in diencephalon.

Third ventricle

13

Location of CSF travel in mesencephalon.

Cerebral aqueduct

14

Location of CSF travel in met encephalon.

Fourth ventricle

15

Location of CSF travel in myelencephalon.

Central canal (of SC)

16

The neural tube gives rise to:

CNS (Brain and SC)

17

During development, cells that don't join neural crest cell cluster, but remain in surface (X) layer, are formally called (Y).

X = ectoderm
Y = the ectodermal placodes

18

Sensory and motor ganglia of PNS arise from (neural crest/placodes).

Neural crest

19

Schwann cells arise from (neural crest/placodes).

Neural crest

20

Inner ear arises from (neural crest/placodes).

Placodes

21

Chromaffin cells of (X) structure arise from (neural crest/placodes).

X = adrenal medulla
Neural crest

22

Nasal cavities arise from (neural crest/placodes).

Placodes

23

Neuromesenchyme of brachial arches arises from (neural crest/placodes).

Neural crest

24

Neuromesenchyme of pharyngeal arches arises from (neural crest/placodes).

Neural crest

25

Adenohypophysis, aka (X), arises from (neural crest/placodes).

X = anterior pituitary gland
Placodes

26

DRG arise from (neural crest/placodes).

Neural crest

27

Ganglia of CNs arise from (neural crest/placodes).

Both (party from neural crest, partly from placodes)

28

T/F: It's common for some propioceptive fibers in CNs to have cell bodies in midbrain, rather than in sensory ganglion.

False - rare exception in CN V

29

Motor ganglia in H/N can be classified according to their (X). List these categories.

X = location;

1. Paravertebral
2. Terminal
3. Parasympathetic motor ganglia

30

T/F: There are no prevertebral sympathetic ganglia in head/neck.

True

31

Preganglionic sympathetic outflow to head/neck primarily from neurons located in:

T1-T5 SC segments

32

Preganglionic sympathetic outflow to head/neck travel via (X) and synapse on (Y).

X = white rami communicantes (then up sympathetic chain)
Y = Superior, middle, inferior cervical sympathetic ganglia

33

Post-ganglionic sympathetic axons to head/neck can be distributed as:

1. Cervical spinal nerves
2. Branches to some CNs and meninges
3. Branches to cervical viscera and heart
4. Plexuses on arteries (carotid, subclavian, vertebral)

34

True "terminal" parasympathetic ganglion cells occur in:

Tongue, trachea, larynx, lower esophagus

35

Parasympathetic motor innervation of head/neck: Where are the preganglionic cell bodies?

Brainstem (scattered nerve nuclei)

36

Parasympathetic motor innervation of head/neck: What do the preganglionic axons travel in?

CN 3, 7, 9, 10

37

List the "discrete" parasympathetic ganglia in head. List the CN that serves as a PATHWAY for each.

1. Ciliary (V1)
2. Pterygopalatine (V2)
3. Otic (V3)
4. Submandibular (V3)

38

Which sensory info is carried by GSA fibers?

1. Exteroception
2. Propioception
3. General sensation

39

General sensation in head/neck is carried by (X) fibers from (Y) structures by (Z) nerves.

X = GSA
Y = viscera
Z = CN 9 and 10

40

General sensation is (well/poorly) localized.

Poorly

41

(X) neuron modalities mediate interoception.

X = GVA

42

Which CNs carry GVA fibers?

7, 9, 10

43

GVA fibers can carry which type of sensory information? Next to each type, include if it retraces path followed by sympathetic/parasympathetic fibers. Star those that reach level of consciousness.

1. Pain info (sympathetic)*
2. Physiological reflexes (parasympathetic)

44

SA fibers are found in which CN?

1, 2, 7, 8, 9, 10

45

SVE fibers are found in which CN?

5, 7, 9, 10, 11

46

(X) muscles develop from first pharyngeal arch and are innervated by CN (Y).

X = mastication
Y = 5

47

(X) muscles develop from second pharyngeal arch and are innervated by CN (Y).

X = facial expression
Y = 7

48

(X) muscles develop from third pharyngeal arch and are innervated by CN (Y).

X = stylopharyngeus (longitudinal muscle of pharynx)
Y = 9

49

(X) muscles develop from fourth and sixth pharyngeal arch and are innervated by CN (Y).

X = soft palate, pharynx, larynx
Y = 10

50

Great vein of Galen drains into (X) sinus

X = straight