10

Question 1

how many spinal cord segments are there?

Answer 1

31 and each has pair of spinal nerves

Question 2

Where does conus medullaris is end/

Answer 2

L1-L2

Question 3

How many cervical segments are there?

Answer 3

8- # 1 is at top and #8 is between C7 and T1

Question 4

What levels are the preganglionic sympathetics found?

Answer 4

T1-L2

Question 5

Is the spinal cord segmented anatomically?

Answer 5

No- segment refers to gray/white matter related to particular spinal nerve

Question 6

Limb myotomes are sequenced in which way?

Answer 6

proximal to distal

Question 7

shoulder muscle myotome level?

Answer 7

C5/6

Question 8

hand muscle myotome?

Answer 8

C8/T1

Question 9

Hip muscle myotome?

Answer 9

L2/L3

Question 10

foot muscle myotome?

Answer 10

s2

Question 11

Pelvic diaphragm muscle myotome?

Answer 11

s2/3/4

Question 12

Why do multiple segments innervate individual muscles?

Answer 12

LMNS are organized in columns that span several segments

Question 13

Quadriceps myotome?

Answer 13

L2-4

Question 14

ankle dorsiflexion myotome?

Answer 14

L4-5

Question 15

do dermatomes overlap? how far?

Answer 15

yes..covers its own and then half above and half below

Question 16

What spinal cord level and nerve does reflex of biceps test?

Answer 16

C5-C6, musculocutaneous

Question 17

What spinal cord level and nerve does triceps brachia reflex test?

Answer 17

C7-8 Radial

Question 18

What spinal cord level and nerve does knee-jerk reflex test?

Answer 18

l3,L4—femoral nerve

Question 19

What spinal cord level and nerve does ankle jerk reflex test?

Answer 19

s1 and s2—tibial nerve

Question 20

where is the lateral horn present?

Answer 20

only at T1-L2

Question 21

Where is lateral part of ventral horn absent?

Answer 21

thoracic levels

Question 22

What is found between ventral and dorsal horns…general terms?

Answer 22

intermediate gray zone

Question 23

Lamina 1 spinal cord =?

Answer 23

posteromarginal nucleus

Question 24

Lamina II spinal cord =?

Answer 24

substantia gelatinosa

Question 25

Lamina III-V spinal cord= ?

Answer 25

nuclesu proprius

Question 26

Lamina V/VI spinal cord= ?

Answer 26

basal nucleus/ base of dorsal horn

Question 27

Lamina VII spinal cord =?

Answer 27

intermediate zone

Question 28

Lamina VIII spinal cord =?

Answer 28

reticular core of ventral horn

Question 29

Lamina IX spinal cord =?

Answer 29

LMN groups

Question 30

Lamina X spinal cord=?

Answer 30

central gray

Question 31

What lamina contain the 2nd order spinothalamic neurons?

Answer 31

Lamina I, IV, V, VI

Question 32

What is found in the intermediate zone between C8 and L3?

Answer 32

dorsal nucleus of clarke for relay of spinocerebellar pathways

Question 33

What cells are found in intermediolateral cell column between S2-4?

Answer 33

preganglionic parasympathetic cell bodies

Question 34

What are the two groups of lower motor neurons in ventral horn?

Answer 34

medial for trunk muscles

lateral for limb muscles

Question 35

Where is the spinal accessory nucleus found?

Answer 35

C1-C5

Question 36

Where is the origin of the pudendal nerve and what is it called?

Answer 36

Onuf’s nucleus and s1-s4

Question 37

What location does bladder control receive innervation from?

Answer 37

S2-4 paraSNA
L1-L2 SNA
S1-S4 somatomotor control

Question 38

Spinal lesions above T12 lead to what type of bladder defect?

Answer 38

reflex spastic bladder.

Question 39

What results happen to bladder control from spinal lesions below T12

Answer 39

flaccid atonic bladder