N Root Dermatomes, Myotomes, Reflexes, And Paresthetic Areas

Question 1

C1 dermatome

Answer 1

Vertex of skull

Question 2

C2 dermatome

Answer 2

Temple, forehead, occiput

Question 3

C3 dermatome

Answer 3

Entire neck, posterior cheek, temporal area, prolongation forward under the mandible

Question 4

C4 dermatome

Answer 4

Shoulder area, clavicular area, upper scapular area

Question 5

C5 dermatome

Answer 5

Deltoid area, anterior aspect of entire arm to base of thumb

Question 6

C6 dermatome

Answer 6

Anterior arm, radial side of hand to thumb and index finger

Question 7

C7 dermatome

Answer 7

Lateral arm and forearm to index, long and ring fingers

Question 8

C8 dermatome

Answer 8

• Medial arm and forearm to long, ring, and little fingers

Question 9

T1 dermatome

Answer 9

Medial side of forearm to base of little finger

Question 10

T2 dermatome

Answer 10

Medial side of upper arm to medial elbow, pectoral and midscapular areas

Question 11

T3-T12 dermatome

Answer 11

• T3-T6 — Upper thorax
• T5-T7 — Costal margin
• T8-T12 — Abdomen and lumbar region

Question 12

L1 dermatome

Answer 12

Back, over trochanter and groin

Question 13

L2 dermatome

Answer 13

Back, front of thigh to knee

Question 14

L3 dermatome

Answer 14

Back, upper buttock, anterior thigh and knee, medial lower leg

Question 15

L4 dermatome

Answer 15

Medial buttock, lateral thigh, medial leg, dorsum of foot, big toe

Question 16

L5 dermatome

Answer 16

Buttock, posterior and lateral thigh, lateral aspect of leg, dorsum of foot, medial half of sole, first, second, and third toes

Question 17

S1 dermatome

Answer 17

Lateral and plantar aspect of foot

Question 18

S2 dermatome

Answer 18

Buttock, thigh and posterior leg

Question 19

S3 dermatome

Answer 19

Groin, posteromedial thigh to knee

Question 20

S4 dermatome

Answer 20

Perineum, genitals, lower sacrum

Question 21

C1 muscle weakness (myotome)

Answer 21

None

Question 22

C2 muscle weakness (myotome)

Answer 22

• Longus colli
• SCM
• Rectus capitus

Question 23

C3 muscle weakness (myotome)

Answer 23

• Traps

- Splenius capitus

Question 24

C4 muscle weakness (myotome)

Answer 24

• Traps

- Levator scap

Question 25

C5 muscle weakness (myotome)

Answer 25

- Supraspinatus - Infraspinatus - Biceps - Deltoid

Question 26

C6 muscle weakness (myotome)

Answer 26

- Biceps - Supinator - Wrist extensors

Question 27

C7 muscle weakness (myotome)

Answer 27

- Triceps - Wrist flexors - Rarely, wrist extensors

Question 28

C8 muscle weakness (myotome)

Answer 28

- UD - Thumb extensors - Thumb adductors - Rarely, triceps

Question 29

L2 muscle weakness (myotome)

Answer 29

- Psoas | - Hip adductors

Question 30

L3 muscle weakness (myotome)

Answer 30

- Psoas - Quads - Thigh atrophy

Question 31

L4 muscle weakness (myotome)

Answer 31

- Tib ant | - Extensor hallicus

Question 32

L5 muscle weakness (myotome)

Answer 32

- Extensor hallicus - Peroneals - Glute med - DF - HS - Calf atrophy

Question 33

S1 muscle weakness (myotome)

Answer 33

- Calf - HS - Wasted glutes - Peroneals - PF

Question 34

S2

Answer 34

- Calf - HS - Wasting of glutes - PF

Question 35

S4 muscle weakness (myotome)

Answer 35

- Bladder | - Rectum

Question 36

C5 reflexes affected

Answer 36

- Biceps | - Brachioradialis

Question 37

C6 reflexes affected

Answer 37

- Biceps | - Brachioradialis

Question 38

C7 reflexes affected

Answer 38

- Triceps

Question 39

L3 reflexes affected

Answer 39

- Knee jerk sluggish - PKB (prone knee bend test) positive - Pain on full SLR

Question 40

L4 reflexes affected

Answer 40

- SLR limited - Neck flexion pain - Weak or absent knee jerk - Side flexion limited

Question 41

L5 reflexes affected

Answer 41

- SLR limited one side - Neck flexion pain - Ankle decreased - Cross-legged raising pain

Question 42

S1 reflexes affected

Answer 42

- SLR limited | - Achilles reflex weak or absent

Question 43

S2 reflexes affected

Answer 43

- SLR limited | - Achilles reflex weak or absent

Question 44

C3 paresthesias

Answer 44

- Cheek | - Side of neck

Question 45

C4 paresthesias

Answer 45

- Horizontal band along clavicle and upper scapula

Question 46

C6 paresthesias

Answer 46

- Thumb | - Index finger

Question 47

C7 parasthersias

Answer 47

- Index - Long - Ring finger

Question 48

C8 paresthesias

Answer 48

- Little finger alone or with 2 adjacent fingers | - (not ring or long fingers, alone or together)

Question 49

L1 paresthesias

Answer 49

- Groin | - After holding posture, which causes pain

Question 50

L2 paresthesias

Answer 50

- Occasionally anterior thigh

Question 51

L3 paresthesias

Answer 51

- Medial knee | - Anterior lower leg

Question 52

L4 paresthesias

Answer 52

- Medial aspect of calf and ankle

Question 53

L5 paresthesias

Answer 53

- Lateral aspect of leg | - Medial 3 toes

Question 54

S1 paresthesias

Answer 54

- Lateral 2 toes - Lateral foot - Lateral leg to knee - Plantar aspect of foot

Question 55

S2 paresthesias

Answer 55

- Lateral leg - Knee - Heel

Question 56

S4 paresthesias

Answer 56

- Saddle area - Genitals - Anus - Impotence - Massive posterior herniation