Posterior Scalene, Posterior View

Description

Seen from the posterior aspect in an adult male, the posterior scalene lies deep in the lateral cervical region, running inferolaterally from the posterior tubercles of the transverse processes of the mid cervical vertebrae (classically C4 to C6) toward its insertion on the external surface of the second rib. Medial to it, the spinous processes and laminae create the midline contour of the cervical spine, while laterally the muscle tucks behind the more superficial trapezius and posterior shoulder envelope. Superiorly it blends into the dense layering of the suboccipital and posterior cervical musculature, and inferiorly it approaches the thoracic inlet, posterior to the scalene triangle formed by the anterior and middle scalenes. Posterior access matters because this is where the posterior scalene’s deep attachments and its relationship to the costovertebral region become easiest to teach without the distraction of the sternocleidomastoid. It is a consistent landmark when discussing thoracic outlet mechanics, since hypertrophy or spasm of the scalene group can contribute to neurovascular compression patterns, and it helps clarify why scalene tension can elevate the first and second ribs during forced inspiration. Small muscle, real symptoms. The posterior view also supports discussion of myofascial pain patterns and the palpation limits imposed by overlying trapezius and levator scapulae. Use it for posterior neck wall teaching in gross anatomy and kinesiology courses, or as a figure in clinical anatomy texts covering thoracic outlet syndrome, cervical rib variants, and regional anesthesia planning where scalene anatomy frames brachial plexus context. It also reads well in physiotherapy and sports medicine materials on accessory respiratory muscle recruitment and cervicothoracic dysfunction. Anatomical accuracy verified by SciePro's Medical Advisory Board.