In this article we will discuss about Scalenus anterior muscle. So let’s get started.
Scalenus anterior muscle
It originated from the anterior tubercle of transverse processes of third, fourth, fifth and sixth cervical vertebrae and gets inserted into scalene tubercle of first rib and upper surface of second rib anterior to subclavian groove. It is innervated by the anterior ramus of C5-C6 and artery supply is through the ascending cervical artery. It’s chief action is elevation of first and ipsilateral flexion of neck. Clinically hypertonic scalene anterior muscle causes compression of brachial plexus and subclavian artery leading to scalenus anterior syndrome.