FIGURE 2-28 Spinal Segments and Dermatomes (A) Medial view showing the five spinal cord segments: cervical (C), thoracic (T), lumbar (L), sacral (S), and coccygeal. (B) Each segment corresponds to a region of body surface (a dermatome) identified by the segment number (e.g., C5 at the base of the neck and L2 in the lower back).