Week 1 Dermatomes Flashcards
Dermatome
The sensory distribution of each nerve root
The area innervated by a nerve root is larger than that innervated by a
peripheral nerve
Vertex of skull
C1
Temple, forehead, occiput
C2
Entire neck, posterior cheek, temporal area, prolongation forward under mandible
C3
Shoulder area, clavicular area, upper scapular area
C4
Deltoid area, anterior aspect of entire arm to base of thumb
C5
Anterior arm, radial side of hand to thumb and index finger
C6
Lateral arm and forearm to index, long, and ring fingers
C7
Medial arm and forearm to long, ring, and little fingers
C8
Medial side of forearm to base of little finger
T1
Medial side of upper arm to medial elbow, pectoral and mid-scapular areas
T2
Upper thorax
T3-T6
Costal Margin
T5-T7
Abdomen and lumbar region
T8-T12
Back, over trochanter and groin
L1
Back, front of thigh to knee
L2
Back, upper buttock, anterior thigh and knee. medial lower leg
L3
Medial buttock, lateral thigh, medial leg, dorsum of foot, big toe
L4
Buttock, posterior and lateral thigh , lateral aspect of leg, dorsum of foot, medial half of sole, first, second, and third toes
L5
Buttock, thigh, and posterior leg
S1 and S2
Groin, medial thigh to knee
S3
Perineum, genitals, lower sacrum
S4
Cervical flexion myotome
C1-2
Cervical side flexion myotome
C3
Scapular elevation Myotomes
C4
Shoulder abduction myotome
C5
Elbow flexion and wrist extension myotome
C6
Elbow extension and wrist flexion myotome
C6
Elbow extension and wrist flexion Myotome
C7
Thumb extension Myotome
C8
Finger abduction myotome
T1
Hip flexion myotome
L1-2
Knee extension myotome
L3
Ankle dorsiflexion nyotome
L4
Big toes extension myotome
L5
Ankle eversion and plantar flexion, hip extension myotome
S1
Knee flexion myotome
S2
S3 myotome is
no specific test action; intrinsic foot muscles (except abductor hallucis)
C5-C6 DTR
Biceps and brachioradialis
C7-C8 DTR
Triceps
L2-L4 DTR
Patella
S1-S2 DTR
Achilles Tendon
L5-S2 DTR
Hamstrings
