What is the action of the pectoralis minor?

Asked by: Kimberly Jones

Function. The primary actions of this muscle include the stabilization, depression, abduction or protraction, internal rotation and downward rotation of the scapula.

What does the pectoralis major and minor do?

The pectoralis minor lies, for the most part, beneath the pectoralis major, arising from the middle ribs and inserting into (attaching to) the scapula (shoulder blade). It aids in drawing the shoulder forward and downward (in opposition to the trapezius muscle).

What is the action of pectoralis major?

The main function of this chest muscle as a whole is the adduction and internal rotation of the arm on the shoulder joint. Acting independently, the clavicular part helps to flex the extended arm up to 90°, while the sternocostal part facilitates the extension of the flexed arm by pulling it downwards.

What is the origin insertion and action of the pectoralis minor?

Attachments of Pectoralis Minor Muscle: Origin & Insertion



Origin: (proximal attachments): Anterior surfaces of the sternal ends of ribs 3-5. Insertion: (distal attachments): Coracoid process of scapula.

How does the pectoralis minor move the scapula?

You can see that it's relatively near the costal cartilage as you can see here these are the costal cartilages of that rib and that is where it's originating. So the anterior surface of ribs. 3 4 & 5.

What does the pectoralis major muscle do quizlet?

What does the pectoralis major muscle do? It adducts the arm.

What is the pectoralis minor muscle?

The pectoralis minor lies, for the most part, beneath the pectoralis major, arising from the middle ribs and inserting into (attaching to) the scapula (shoulder blade). It aids in drawing the shoulder forward and downward (in opposition to the trapezius muscle).

What joint does the pectoralis minor move?

shoulder joint

The pectoralis minor muscle functions primarily to move the scapula both forward and downward. The scapula is one of the bones that make up the shoulder joint.

What movement does the pectorals produce?

The pectoralis major’s primary functions are flexion, adduction, and internal rotation of the humerus. The pectoral major may colloquially be referred to as “pecs”, “pectoral muscle”, or “chest muscle”, because it is the largest and most superficial muscle in the chest area.

What muscles do push ups work?

They work the triceps, pectoral muscles, and shoulders. When done with proper form, they can also strengthen the lower back and core by engaging (pulling in) the abdominal muscles. Pushups are a fast and effective exercise for building strength. They can be done from virtually anywhere and don’t require any equipment.

What Innervates the pec minor?

It may also be innervated by the lateral pectoral nerve via a communicating branch known as ‘ansa pectoralis’, The blood vessel that supplies the pectoralis minor muscle is the thoracoacromial artery; a short artery that branches off from the larger axillary artery of the chest and upper extremities.