Pectoralis Minor Muscle Origin And Insertion

Anterior surfaces of the third to fifth ribs insertion. Origin 3 4 5 ribs.

Anatomy Of Upper Limb

Flexion adduction and internal rotation of the arm at shoulder innervation.

Pectoralis minor muscle origin and insertion. The pectoralis minor muscle is covered anteriorly superficially by the clavipectoral fascia. The pectoralis minor is triangular in shape and is located under the pectoralis major and both form the anterior wall of the axilla. Since the pectoralis minor muscle is smaller and located underneath the pectoralis major this muscle is thought of as the little brother muscle of the chest.

The medial pectoral nerve pierces the pectoralis minor and the clavipectoral fascia. It consists of a clavicular part and a sternal part both converging to a flat tendon that inserts on the humerus. Together with other muscles of the region it produces various movements of the.

Muscle anatomy of the pectoralis minor. The pectoralis minor muscle is one of the most superficial muscles on the anterior aspect of the chest or thoracic wall located deep only to the pectoralis major muscle it is one of the anterior axioappendicular thoracoappendicular muscles together with the pectoralis major subclavius and serratus anterior. It is also located close in relation to the brachial plexus and both the subclavian artery and vein which all run between the muscle and the rib cage.

Muscle anatomy of the pectoralis major. It s innervated by both medial and lateral pectoral nerves. The main pain zone of the pectoralis minor is the front of your shoulder but you might also experience a radiating pain into your chest and all the way down your inner arm.

Pectoralis major is a thick fan shaped muscle contributing to the thoracobrachial motion. Action elevates ribs if scapula fixed protracts scapula assists serratus anterior nerve medial pectoral nerve c8 t1 from medial cord. Anterior surface of the medial half of the clavicle insertion.

Medial pectoral nerve c8 t1 from medial cord and lateral pectoral nerve c5 c6 c7 from lateral cord. In attaching to the coracoid process the pectoralis minor forms a bridge structures passing into the upper limb from the thorax will pass directly underneath. The pectoralis major from latin pectus meaning breast is a thick fan shaped muscle situated at the chest of the human body it makes up the bulk of the chest muscles and lies under the breast beneath the pectoralis major is the pectoralis minor a thin triangular muscle the pectoralis major s primary functions are flexion adduction and internal rotation of the humerus.

Origin insertion action. When your pectoralis minor contains trigger points it can give you pain right at the location of these spots and send it to other seemingly unrelated areas of your body. Lateral lip of the bicipital groove of the humerus and anterior lip of the deltoid tuberosity actions.

Insertion medial and upper surface of coracoid process of scapula. The shortened tight muscle can be easily palpated there. Via a tendon to the medial aspect of the coracoid process of the scapula part or all of the tendon may transverse this process and continue into the coracoacromial ligament.

Pectoralis Minor Muscle Origin Insertion And Action Kenhub