Dermatomes Flashcards
Which cervical nerve supplies the skin of the neck, temple, forehead, and occiput?
C2
What regions are innervated by C3?
Entire neck, posterior cheek, temporal area, and forward prolongation under mandible
Which areas of the body does C4 provide sensation to?
Shoulder area, clavicular area, upper scapular area
What regions are affected by C5?
Deltoid area, anterior arm, and ends at the wrist
Which cervical nerve innervates the anterior arm and radial side of the hand, including the thumb and index finger?
C6
What regions are innervated by C7?
Posterior arm and forearm to index, middle fingers
What areas does C8 primarily provide sensation to?
Medial arm and forearm to ring, and little fingers
What area of the body is supplied by T1?
Medial forearm to the lateral side of wrist
Which thoracic nerve supplies the medial side of the upper arm, medial elbow, pectoral, and midscapular areas?
T2
What region is innervated by T3-T6?
Upper thorax
Which thoracic nerves provide sensation to the costal margin?
T5-T7
What regions are affected by T8-T12?
Abdomen and lumbar region
Which lumbar nerve supplies the back, over the trochanter, and the groin area?
L1
What does L2 innervate?
Back and front of the thigh to the knee
What areas of the body are served by L3?
Back, upper buttock, anterior thigh and knee, medial lower leg
Which lumbar nerve provides sensation to the medial buttock, lateral thigh, medial leg, dorsum of the foot, and big toe?
L4
What regions does L5 innervate?
Buttock, posterior and lateral thigh, lateral aspect of leg, dorsum of foot, medial half of sole, first, second, and third toes
What areas are affected by S1?
Buttock, posterior thigh, and posterior leg
Which sacral nerve supplies the same region as S1 and also supports the groin area?
S2
What does S3 primarily supply?
Groin and medial thigh to knee
What areas are innervated by S4?
Perineum, genitals, and lower sacrum
What regions are supplied by C2 apart from the skin of the neck?
Temple, forehead, and occiput
What does C3 innervate under the mandible?
Temporal area prolongation
Which lumbar nerve supplies the medial lower leg in addition to the anterior thigh and knee?
L3
What area is associated with the thoracic nerves T5-T7?
Costal margin
Which sacral nerve affects both the posterior thigh and the groin area?
S2
Which areas are primarily affected by T8-T12?
Abdomen and lumbar region
What does C5 innervate in the anterior arm apart from the deltoid area?
Base of the thumb
What cervical nerve supplies sensation to the shoulder area?
C4
Which thoracic nerve innervates the medial upper arm, medial elbow, and pectoral areas?
T2
What does S4 primarily innervate apart from the lower sacrum?
Perineum and genitals
Which cervical nerve provides sensation to the radial side of the hand?
C6
What lumbar nerve innervates the dorsum of the foot along with the first three toes?
L5
What areas does T1 supply apart from the medial forearm?
Base of the little finger
Which sacral nerve provides sensation to the groin and medial thigh?
S3
