Dermatomes of the upper limb (Fig. 7.15A) are often tested for sensation. Areas where overlap of dermatomes is minimal include the: upper lateral region of the arm for spinal cord level C5, palmar pad of the thumb for spinal cord level C6, pad of the index finger for spinal cord level C7, pad of the little finger for spinal cord level C8, and skin on the medial aspect of the elbow for spinal cord level T1.