Dermatome Distribution

Question 1

CN V

Answer 1

• Dermatome Location - Anterior facial region
• Muscles Facilitated - Mastication
• Function - Ingestion

Question 2

C3

Answer 2

• Dermatome Location - Neck region
• Muscles Facilitated - sternocleidomastoid, upper trapezius
• Function - Head control, neck lateral flexion

Question 3

C4

Answer 3

• Dermatome Location - Upper shoulder region
• Muscles Facilitated - levator scapulae, trapezius (diaphragm)
• Function - shoulder elevation

Question 4

C5

Answer 4

• Dermatome Location - Lateral aspect of shoulder
• Muscles Facilitated - Deltoid, biceps, superspinatus
• Function - shoulder abduction

Question 5

C6

Answer 5

• Dermatome Location - Thumb and radial forearm
• Muscles Facilitated - Wrist extensors, biceps, supinator
• Function - elbow flexion, wrist extension

Question 6

C7

Answer 6

• Dermatome Location - Middle finger
• Muscles Facilitated - Triceps, wrist flexors
• Function - Wrist flexion , elbow extension

Question 7

C8

Answer 7

• Dermatome Location - Little finger, ulnar forearm
• Muscles Facilitated - Ulnar deviators, thumb extensors, thumb adductors.
• Function - Thumb extension

Question 8

T1

Answer 8

• Dermatome Location - Axilla and Proximal medial arm
• Muscles Facilitated - Hand intrinsics
• Function - Abduction adn adduction of fingers.

Question 9

T2-12

Answer 9

• Dermatome Location - Thorax
• Muscles Facilitated - Intercostals
• Function - Respiration

Question 10

T4-T6

Answer 10

• Dermatome Location - Nipple line
• Muscles Facilitated - Intercostals
• Function - Respiration

Question 11

T11

Answer 11

• Dermatome Location - Midchest region, lower rib
• Muscles Facilitated - Abdominal wall, abdominal muscles
• Function - T5-T7 superficial abdominal reflex

Question 12

L2

Answer 12

• Dermatome Location - Proximal anterior thigh
• Muscles Facilitated - Iliopsoas, adductors of thigh
• Function - hip flexion

Question 13

L3-4

Answer 13

• Dermatome Location - Anterior Knee
• Muscles Facilitated -L3 Quadriceps, L4 tibialis anterior,
• Function - L3 knee extension. L4 ankle dorsiflexion

Question 14

L5

Answer 14

• Dermatome Location - Great toe
• Muscles Facilitated - Extensor Hallucis, hamstrings
• Function - Great toe extension, knee flexion

Question 15

S1

Answer 15

• Dermatome Location - Foot region
• Muscles Facilitated - Calf and Hamstring, Wasting of Gluteals, Peroneals, Plantar Flexors
• Function - Ankle plantar-flexion, ankle eversion, urinary retention

Question 16

S2

Answer 16

• Dermatome Location - Narrow band of posterior thigh
• Muscles Facilitated - calf and hamstrings
• Function - knee flexion

Question 17

S3-5

Answer 17

supply the bladder. bowel and sex organs and the anal and other pelvic muscles. anal/bladder sphincter control.