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Flashcards in (2) Spinal Cord Deck (121)
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1

what system is the spinal cord a part of?

central nervous system

2

where does the spinal cord continue form

the medulla oblongata (of the brainstem)

3

sympathetic vs parasympathetic nervous system

sympathetic= fight or flight (spinal cord)

parasympathetic= rest and digest (brainstem/spinal cord)

4

dorsal vs ventral spinal cord

dorsal/posterior= sensory INTO spinal cord

ventral/anterior= motor OUT OF spinal cord

5

function of the foramen magnus

defines the border of the brainstem and spinal cord

- part of occipital bone

6

4 main functions of the spinal cord

motor functions

reflex integration

autonomic functions

impulse conduction

7

motor functions of the spinal cord

- enable us to move and interact with environment

- location of lower motor neurons controlling muscle function in limbs/torso

8

reflex integration of the spinal cord

specific pathways originating from periphery allow for reflexive movements rather than those initiated by brain

(e.g. involuntary movement)

9

autonomic functions of the spinal cord

sympathetic and part of the parasympathetic NS (ANS)

- internal organ function

10

impulse conduction of the spinal cord

provides means of neural communication to and from the brain

- ascending tracts and descending tracts

11

ascending vs descending tracts of the spinal cord

ascending= conduct impulses from peripheral sensory receptors to the brain

descending= conduct motor impulses from brain to muscles and glands

12

where does the spinal cord start and end

start: foramen magnum

end: filum terminale

13

2 enlargements of the spinal cord

cervical and lumbar enlargement

- contain network that control arm/leg movement

14

cervical enlargement location

C5 -- T1

controls arm movements

15

lumbar enlargement location

L2 -- S3

controls leg movements

- ends at conus medullaris

16

central canal of the spinal cord function

filled with CSF

- nurtures spinal cord
- carries material

17

dorsal and ventral roots pass through

dorsal= dorsal lateral sulcus

ventral= ventral lateral sulcus

18

how many spinal cord segments?

31 in total

8- cervical
12- thoracic
5- lumbar
5- sacral
1- coccygeal

19

where is dorsal root ganglia and what does it contain?

DRG is in the PNS

contains cell bodies of sensory neurons

20

spinal cord segments give rise to ....

(one exception)

segments give rise to spinal nerves

exception: No C8 vertebrae

21

cervical plexus and brachial plexus control what??

arm and neck movements

22

dorsal rootlets enter where

enters posterolateral sulcus

- bears dorsal root ganglia (contain cell bodies of primary sensory neurons)

23

ventral rootlets leave where?

leave from anterolateral sulcus

24

what is a dermatome?

area of skin supplied by nerves from single spinal root

25

C1 and C3 segment dermatomes

C1 segment= no dermatome

C3= neck

26

does the face have a dermatome?

NO

face is innervated by cranial nerves (not spinal!)

27

spinal cord is located within... (why?)

vertebral canal

provides protection

28

3 protective sheets of the spinal cord are called?

Meninges

1) dura mater
2) Arachnoid mater
3) pia mater

29

dura, arachnoid and pia mater

dura= outer, toughest

arachnoid= middle, spiderweb

pia= inner, wrap spinal cord tissue

30

what is between the arachnoid and pia mater?

CSF