Page 409 - ATP-P 11th Ed

Levels of Principal Dermatomes
• C5 – clavicles • T12 – inguinal or groin regions
• C5, C6, C7 – lateral parts of the • L1 L2 L3 L4 – anterior and inner
upper limb services of lower limb
• C8, T1 – medial sides of the • L4, L5, S1 – foot
upper limb • L4 – medial side of big toe
• C6 – thumb • S1. S2, L5 – posterior and outer
• C6, C7, C8 – hand surfaces of lower limbs
• C8 – ring and little fingers • S1 – lateral margin of foot and
• T4 – level of nipples little toe
• T10 – level of umbilicus • S2, S3, S4 – perineum

NERVE TABLE
Sensory/Motor Impairments Related to Level of Spinal Injury
Disc Root Reflex Muscles Sensation
C4-C5 C5 Biceps Deltoid Lateral arm
Biceps Axillary nerve
C5-C6 C6 Brachioradialis Wrist extension Lateral forearm
Biceps Biceps Musculocutaneous
nerve
C6-C7 C7 Triceps Wrist flexors Middle finger
Finger extension
Triceps
C7-T1 C8 Finger extension Medial forearm
Hand intrinsics Medial antebrachial
cutaneous nerve
T1-T2 T1 Hand intrinsics Medial arm
Medial antebrachial
cutaneous nerve
L3-L4 L4 Patellar Anterior tibialis Medial leg
Medial foot
L4-L5 L5 Internal hamstring Extensor hallucis longus Lateral leg
(difficult to elicit) Peroneus longus Dorsum of foot SECTION 6
L5-S1 S1 Achilles Gastrocnemius Sole of foot
Internal hamstring Lateral foot
External hamstring

ATP-P Handbook 11th Edition 399