Colored Dermatome Distribution Chart for Half

Description

Presented as a half-body adult male surface map, the chart assigns distinct colors to segmental dermatomes across the face, trunk, and limbs, tracing cutaneous sensation back to individual spinal nerve roots. Cervical territories span the neck, shoulder, and upper limb, with C5 over the lateral arm, C6 along the radial forearm and thumb, C7 centered on the middle finger, C8 on the ulnar hand, and T1 on the medial forearm. Thoracic dermatomes wrap circumferentially around the thorax and abdomen in near-horizontal bands, while lumbar and sacral segments continue over the anterior thigh and leg (L2 to L5) and sweep posterolaterally toward the perineal and posterior lower limb regions (S1 to S5). Midline is a boundary. Overlap is expected. Dermatomal charts matter when you need to separate nerve root disease from peripheral nerve entrapment, and a half-body presentation keeps the segmental sequence readable from head to toe without bilateral distraction. Clinically, the pattern guides localization in cervical or lumbar radiculopathy from disc herniation, helps frame the sensory level in spinal cord lesions, and supports documentation of postherpetic rash distribution in herpes zoster. The depiction also reinforces common landmarks used on exams, such as T4 at the nipple line and T10 at the umbilicus, while acknowledging that real patients show variability and adjacent-root overlap. Neurology and orthopedic teaching sessions use this graphic to train quick sensory mapping during the bedside exam, and anesthesia teams often reference dermatomes when planning or recording neuraxial blockade levels. Medical publishers can place it alongside peripheral nerve maps to clarify why a C6 radiculopathy differs from median nerve compression at the carpal tunnel. Anatomical accuracy verified by SciePro's Medical Advisory Board.