Subclavius muscle
Table of Contents
Subclavius Muscle Anatomy
The subclavius is a small triangular muscle, placed between the clavicle and the first rib. Along with the pectoralis major and pectoralis minor muscles, the subclavius muscle makes up the anterior wall of the axilla.
Origin
The subclavius muscle originates from the first rib. Specifically, this muscle begins in the area between the bone and the cartilage of the first rib. From this location, the muscle travels outward.
Insertion
It inserts on the subclavian groove on the clavicle which is located on the inferior surface of the one-third clavicle.
Nerve supply
It is supplied by the nerve to subclavius from upper trunk of the brachial plexus.
Blood supply
The subclavius muscle receives arterial blood from the clavicular branch of the thoracoacromial artery, with contributions from the suprascapular artery.
Action
It acts as a depressor of the clavicle and elevates the first rib.
The subclavius muscle guards the brachial plexus and subclavian vessels underneath when the clavicle, the most frequently broken long bone, is injured.
Strengthening exercise
Stretching Exercise:
- Sit on the very edge of the folded blanket on the floor. The blanket will tilt your pelvis forward, helping you to sit taller and straighter. Legs are together and straight out in front of you.
- Place your hands on either side of your hips and slightly behind you on the floor.
- To begin the stretch, press your palms into the floor as you draw the shoulder blades together and down towards the tailbone.
- Pull the belly button towards the spine to protect the low back.
- This stretch is all about the chest and you should feel no strain or discomfort in the lower back.
- The legs stay active the entire time. Gaze stays at horizon level. Ears are in line with the shoulders.
- Hold this position for 1-2 min and then relax the arms to come out of the stretch.
Related pathology
Costoclavicular syndrome
The vessels and nerves running behind the subclavius muscle can sometimes become entrapped between the clavicle and the first rib, inside the costoclavicular space. This is referred to as costoclavicular syndrome and marks one of the three types of thoracic outlet syndromes (TOS).
This syndrome can be caused by fractures and thoracic deformities, amongst others. Typical symptoms include irritations of the brachial plexus and circulatory disorders of the arm.
FAQs
Between the clavicle and the first rib, there is a tiny triangle muscle called the subclavius. The subclavius muscle is a part of the anterior axioappendicular muscles, often known as the anterior wall of the axilla, together with the pectoralis major and minor muscles. the subclavius muscle.
The stabilization of the sternoclavicular joint (SCJ) and resistance to elevation of the lateral end of the clavicle are two of the subclavius muscle’s (SM) roles.
A muscle of the anterior chest wall is the subclavius. It is a little muscle that lies just below the clavicle. Attachments: originates at the point where the first rib meets the costal cartilage. the middle part of the clavicle’s inferior surface, where the subclavius muscle inserts.
The subclavius muscle is located beneath the clavicle, or collarbone, in the human body.
Yes, the subclavius muscle is located in the shoulder region. It is a small, triangular muscle that lies just below the clavicle or collarbone.
