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Undeleted > Segmental Organization of Spinal Cord > Flashcards

Segmental Organization of Spinal Cord Flashcards

1
Q

Preganglionic sympathetic neurons are at levels:

A

T1-L2, S2-S4

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2
Q

Myotome level of upper limb:
Shoulder muscles
Hand muscles

A

C5/6

C8/T1

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3
Q

Myotome level of lower limb:
Hip muscles
Foot muscles

A

L2/L3

S2

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4
Q

Myotome level of diaphragm

A

C3-5

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5
Q

Myotome level of pelvic diaphragm/perineum

A

S2/3/4

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6
Q

Myotome innervation of elbow flexion

A

C5, C6

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7
Q

Myotome innervation of elbow extension

A

C7, C8

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8
Q

Myotome innervation of knee extension

A

L3, L4

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9
Q

Myotome innervation of angle plantar flexion

A

S1, S2

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10
Q

Dermatome innervation of fingertips

A

C6-8

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11
Q

Dermatome innervation of nipple

A

T4

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12
Q

Dermatome innervation of umbilicus

A

T10

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13
Q

Dermatome innervation of toes

A

L5-S1

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14
Q

Lamina 1 =

A

Posteromarginal nucleus

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15
Q

Lamina 2 =

A

Substantia gelatinosa

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16
Q

Lamina 3-5 =

A

Nucleus proprius

17
Q

Lamina 5-6 =

A

Basal nucleus/base of dorsal horn

18
Q

Lamina 7 =

A

Intermediate zone

19
Q

Lamina 8 =

A

Reticular core of ventral horn

20
Q

Lamina 9 =

A

LMN groups

21
Q

Lamina 10 =

A

Central gray

22
Q

Spinothalamic neurons are present in only ____ laminae

A

1, 4, 5, 6

23
Q

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

A

C8-L3

7, Intermediate zone

24
Q

Medial group neurons of the ventral horn innervate ___

A

Trunk muscles

25
Q

Lateral group neurons of the ventral horn innervate ___

A

Limb muscles

26
Q

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

A

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

27
Q

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

A

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

28
Q

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

A

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

29
Q

Spinal cord neuron columns found on all levels (3)

Responsible for ____

A

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

30
Q

Clarke’s nucleus are at levels:

A

C8-L3

31
Q

IML are at levels:

A

T1-L2

32
Q

Lateral group LMN are at levels:

Contain:

A

C4-T1, L2-S2

Motor neurons going to limbs

33
Q

Motor and descending pathways (6)

A 
Lateral/anterior coritcospinal tract
Rubrospinal tract
Reticulospinal tract
Olivospinal tract
Vestibulospinal tract
34
Q

Sensory and ascending pathways

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

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