Middle Scalene - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The middle scalene is one of the scalene muscles of the neck. It is the largest of the three scalene muscles and consists of several muscle bellies arising from the cervical spine. Attachments: Originates from the posterior tubercles of the transverse processes of C2-C7. It attaches onto the superior aspect of the 1st rib. Function: Elevation of the first rib. Ipsilateral contraction causes ipsilateral lateral flexion of the neck. Innervation: Anterior rami of C3-C8. Blood Supply: Ascending cervical branch of inferior thyroid artery By TeachMeSeries Ltd (2026) Fig 1The anterior, middle and posterior scalene muscles of the neck Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Frequent questions What is the middle scalene muscle? The middle scalene is the largest of the three scalene muscles located in the neck. It plays a vital role in neck movement and rib elevation. Where does the middle scalene muscle originate? The middle scalene muscle originates from the posterior tubercles of the transverse processes of the cervical vertebrae C2 to C7. This anatomical position allows it to effectively assist in neck movements. What is the primary function of the middle scalene muscle? The primary function of the middle scalene muscle is to elevate the first rib during respiration. Additionally, it facilitates ipsilateral lateral flexion of the neck when contracted. How is the middle scalene muscle innervated? The middle scalene muscle is innervated by the anterior rami of spinal nerves C3 to C8. This innervation is crucial for its motor function and coordination. What is the blood supply to the middle scalene muscle? The blood supply to the middle scalene muscle is primarily provided by the ascending cervical branch of the inferior thyroid artery. This vascular support is essential for muscle health and function. Rate This Article