Chapter 16 Part 1 Flashcards Preview

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Flashcards in Chapter 16 Part 1 Deck (37):
1

Meninges- ;superficial and ends at s2

Dura mater

2

-middle layer -Avascular -subarachnoid space contains CSF (cerobrospinal fluid)

Arachnoid

3

Deepest and forms denticulate ligaments triangular shaped extensions that laterally anchor cord

Pig mater

4

In ___ spinal cord ends at superior border of L2(external spinal cord anatomy)

Adults

5

(Enlargements) ;nerves to upper limbs

Cervical

6

(Enlargements) ;nerves to lower limbs

Lumbar

7

Cone shaped end of spinal cord

Conus medullaris

8

Spinal nerves extending from end of cord like a horses tail

Cauda equina

9

Pig Mater extension that anchors spinal cord to coccyx

Filum terminale

10

(Internal spinal cord anatomy) ; shaped like letter H surrounded by white matter

Gray matter

11

Mainly contains cel bodies and unmyelinated neurons -subdivided into 3 horns

Gray matter

12

Groups of cell bodies in CNS

Nuclei

13

Contains sensory axons and nuclei

Posterior horn

14

Contains somatic motor nuclei ;controlled Skelton muscles

Anterior horn

15

Contains autonomic motor nuclei; controls glands, smooth and cardiac muscle

Lateral horn

16

Contains myelinated neurons

White matter

17

Subdivided into 3 columns

Anterior,posterior and lateral

18

Buddles of neurons located in white matter of CNS

Tracts

19

Conduct impulses to brain

Sensory (ascending) tracts

20

Conduct impulses from brain

Motor (descending) tracts

21

31 pairs in PNS are mixed (sensory and motor) nerves

Spinal nerves

22

(C1-c8)

Cervical

23

(T1-t12)

Thoracic

24

(L1-l5)

Lumbar

25

S1-s5

Sacral

26

Co1

Coccygeal

27

Connect spinal cord to nerves

Roots

28

2 types of roots

Posterior (dorsal) root & anterior (ventral) root

29

Contains sensory neurons to CNS ; controls sensations

Posterior (dorsal) root

30

Contains motor neurons from CNS,controls movement

Anterior (central root

31

(Spinal nerve coverings) ;outermost layer surrounding the entire nerve

Epineurium

32

(Spinal nerve coverings) ; middle layer surrounding axon Buddles fascicles

Perineum

33

Protective structures include vertebral column and meninges

Spinal cord

34

(Spinal never coverings) ; intermost layer surrounding individual axon

Endoneurim

35

Spinal nerve branches (extensions)

Rami

36

Supplies dorsal trunk

Posterior (dorsal ) Remus

37

Supplies lateral and ventral tuck

Anterior ventral Ramus