-----------+------------------------+--------------+--------------- Segment. | Muscles. | Reflexes. | Sensation. -----------+------------------------+--------------+--------------- 2d-3d C. | Sterno-mast. trapezius.| . . . . . . | Neck and back | Scaleni and musc. of | | of head. | neck. | | | Diaphragm. . . . . . . | Hypochon- | | | drium (?). | | | | 4th C. | Diaphragm. . . . . . . | Dilatation | Neck. | | of pupil. | | Supra- and | On irritation| Upper shoulder. | infra-spinatus. | of neck. | | Deltoid. . . . . . . . | 4th-7th C. | Outer arm. | Biceps and | | | coraco-brach. | | | Supinator longus. | | | Rhomboid. | | | | | 5th C. | Deep muscles of | Scapular. | Back of should- | shoulder-blade. . . | 5th C.-1st D.| er and arm. {78} | Deltoid. . . . . . . | . . . . . . | Outer side of | | | arm and | | | forearm. | Biceps and | | Ant. upper | coraco-brach. . . . | . . . . . . | two-thirds of | | | arm. | Supinator longus. | | | Pectorales. | | | Serratus magnus. | | | Triceps. | Elbow tendon.| | Rhomboid, teres minor. | 5th-6th C. | | | | 6th C. | Biceps, brach. antic. | . . . . . . | Outer side of | | | arm and | | | forearm. | Pectorales. . . . . . | . . . . . . | Inner and front | | | of forearm. | Serratus magnus. | | | Triceps. | | | Extensors of wrist and | Wrist | | fingers. . . . . . | tendons. | | Flexors of wrist. . . | Wrist | | | tendons. | | Pronators, supinator | 6th-8th C. | | brevis. . . . . . . | | | | | 7th C. | Triceps, long head. . | . . . . . . | Inner and back | | | of arm and