Segmental Organization of Spinal Cord Flashcards Preview

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Flashcards in Segmental Organization of Spinal Cord Deck (34):
1

Preganglionic sympathetic neurons are at levels:

T1-L2, S2-S4

2

Myotome level of upper limb:
Shoulder muscles
Hand muscles

C5/6
C8/T1

3

Myotome level of lower limb:
Hip muscles
Foot muscles

L2/L3
S2

4

Myotome level of diaphragm

C3-5

5

Myotome level of pelvic diaphragm/perineum

S2/3/4

6

Myotome innervation of elbow flexion

C5, C6

7

Myotome innervation of elbow extension

C7, C8

8

Myotome innervation of knee extension

L3, L4

9

Myotome innervation of angle plantar flexion

S1, S2

10

Dermatome innervation of fingertips

C6-8

11

Dermatome innervation of nipple

T4

12

Dermatome innervation of umbilicus

T10

13

Dermatome innervation of toes

L5-S1

14

Lamina 1 =

Posteromarginal nucleus

15

Lamina 2 =

Substantia gelatinosa

16

Lamina 3-5 =

Nucleus proprius

17

Lamina 5-6 =

Basal nucleus/base of dorsal horn

18

Lamina 7 =

Intermediate zone

19

Lamina 8 =

Reticular core of ventral horn

20

Lamina 9 =

LMN groups

21

Lamina 10 =

Central gray

22

Spinothalamic neurons are present in only ____ laminae

1, 4, 5, 6

23

Dorsal nucleus of Clarke (Nucleus dorsalis) at levels ___ located in lamina ____

C8-L3
7, Intermediate zone

24

Medial group neurons of the ventral horn innervate ___

Trunk muscles

25

Lateral group neurons of the ventral horn innervate ___

Limb muscles

26

Spinal accessory nucleus
At levels ___
Origin of the ____ nerve
Function:

Independent motor nuclei in the ventral horn
C1-C5
Spinal accessory nerve (CN11)
Somatomotor control of trapezius and SCM mm.

27

Phrenic nucleus
At levels ___
Origin of the ____ nerve
Function:

Independent motor nuclei in the ventral horn
C3-C5
Phrenic neve
Somatomotor control of diaphragm

28

Onuf's nucleus
At levels ___
Origin of the ____ nerve
Function:

Independent motor nuclei in the ventral horn
S1-S4
Pudendal nerve
Somatomotor control of external voluntary urethral and anal sphincter

29

Spinal cord neuron columns found on all levels (3)
Responsible for ____

Nucleus proprius
Substantia gelatinosa
Posteromarginal nucleus
Sending pain and temperature from every level of skin and viscera

30

Clarke's nucleus are at levels:

C8-L3

31

IML are at levels:

T1-L2

32

Lateral group LMN are at levels:
Contain:

C4-T1, L2-S2
Motor neurons going to limbs

33

Motor and descending pathways (6)

Lateral/anterior coritcospinal tract
Rubrospinal tract
Reticulospinal tract
Olivospinal tract
Vestibulospinal tract

34

Sensory and ascending pathways

Dorsal column medial lemniscus system
Spinocerebellar tracts (posterior/anterior)
Spinothalamic tracts (lateral/anterior)
Spino-olivary fibers