Spinal Cord Flashcards Preview

Anatomy Lecture Exam #3 > Spinal Cord > Flashcards

Flashcards in Spinal Cord Deck (60):
1

What is the spinal cord the link between?

The brain and the body

2

What are the two functions of the spinal cord?

Pathway for sensory and motor impulses and reflexes

3

What is a reflex?

The quickest reaction to a stimulant

4

What is the length of the spinal cord in cm and inches?

42-45 cm, and 16-18 in

5

What are the two longitudinal depressions in the spinal cord?

Posterior median sulcus and anterior median fissure

6

What are the five different names for parts of the spinal cord?

Cervical, Thoracic, Lumbar, Sacral, Coccygeal

7

What does the cervical enlargement control?

Motor control of upper limbs

8

What does the lumbosacral enlargement control?

Motor control of the lower limbs

9

What is the conus medularis?

Tapering inferior end of spinal cord

10

What is the caudal equina?

groups of axons projecting inferiorly

11

What is the film terminale?

Anchors conus medullar is to coccyx

12

How many pairs of spinal nerves are there?

31

13

How many cervical spinal nerves are there?

8

14

How many thoracic spinal nerves are there?

12

15

How many lumbar spinal nerves are there?

5

16

How many sacral spinal nerves are there?

5

17

How many coccygeal spinal nerves are there?

1

18

What do the spinal cord meninges do?

Protects and encapsulates spinal cord

19

What are the spinal cord meninges a continuation of?

The brain's meninges

20

What does the spinal dura mater not have that the cranial dura mater has?

Periosteal layer

21

What are the three spinal cord meninges from furthest away to deepest?

Dura mater, arachnoid mater, pia mater

22

What is the pia mater found on?

Spinal cord

23

What does the pia mater support?

Blood vessels

24

What are denticulate ligaments?

Lateral extensions that attach to dura mater

25

What is the epidural space?

Space between vertebra and dura mater

26

What is the subdural space?

space between dura mater and arachnoid mater

27

What is the subarachnoid space?

Space between arachnoid mater and pia mater

28

Of the three spaces, which one can potentially happen?

Subdural space

29

What is the subarachnoid mater filled with?

CSF

30

What is the gray matter?

Inner portion, butterfly shaped

31

What are the 4 categories the gray matter is divided into?

anterior horns, lateral horns, posterior horns, gray commissures

32

What kind of nuclei are the anterior horns made of?

Somatic motor nuclei

33

What kind of nuclei are the posterior horns made of?

somatic sensory

34

IN the posterior horn, what are the somatic sensory nuclei made of?

Soma of interneurons and axons of sensory neurons

35

In the posterior horn, what are the visceral sensory nuclei made of?

Soma of interneuron and axons of sensory neurons

36

What are the three regions of white matter on the spinal cord?

Posterior funiculus, anterior funiculus, and lateral funiculus

37

What connects white matter together?

White commissures

38

What are ascending and descending tracts made of?

Axons in the funiculus

39

What is an ascending tract?

Sends sensory information to brain

40

What is a descending tract?

Sends motor information away from the brain

41

What does the anterior root contain?

motor axons

42

What does the posterior root contain?

sensory axons and posterior root ganglion

43

What does the posterior root ganglion contain?

Sensory somas

44

What are the two spinal nerve branches?

Posterior and anterior ramus

45

Which of the two spinal branches is the smaller one?

Posterior ramus

46

What does the posterior ramus innervate?

The posterior trunk

47

What does the anterior ramus innervate?

Anterior and lateral trunk, limbs

48

What is a plexus?

network of interweaving spinal nerves

49

What is the other structure on the rami communicants?

Sympathetic trunk ganglion

50

Where are parasympathetic neurons found?

Brainstem and sacral region

51

Where are sympathetic neurons found?

thoracic and lumbar region

52

Where is the sympathetic trunk found?

Anterior to spinal nerves, lateral to spinal column

53

What are sympathetic trunk ganglion?

Somas of sympathetic neurons

54

What can postganglionic neurons do?

Move up/down the trunk

55

What is a reflex arc?

Neural wiring of a single reflex

56

What are the three steps of a reflex arc?

Receptor in PNS communicates with Cns and gets sent to a PNS receptor

57

What is ipsilateral?

Receptor and effector are on the same side

58

What is contralateral?

Receptor and effector are on opposite sides

59

What is monosynaptic?

Sensory axons synapse directly with motor neurons

60

What is polysynaptic?

Multiple synapses including interneurons