What arteries supply the pectoralis major?
What artery supplies the pectoralis minor?
What is the innervation to pectoralis major and minor?
Both muscles form part of the anterior wall of the axilla region. Attachments: Originates from the 3rd-5th ribs and inserts into the coracoid process of the scapula. Function: Stabilises the scapula by drawing it anteroinferiorly against the thoracic wall. Innervation: Medial pectoral nerve.
What drains the pectoralis major?
Where is superior thoracic artery?
What is pectoralis major and minor?
What nerve controls the pectoralis major?
What nerve innervates the pectoralis minor?
What does pectoralis minor attach to?
What are the three cords around the axillary artery?
What is the function of the pectoralis major?
Where is the axillary pulse?
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| Axillary artery | |
|---|---|
| FMA | 22654 |
| Anatomical terminology | |
Where is the pectoralis major located?
If you place one hand on the front of your shoulder and slide it in toward your breast bone, your pecs reside under the layer of fatty tissue or breast tissue of your chest.
What are the pectoralis majors?
You have two pectoralis majors or "pecs," one on each side of your chest. These large muscles help you move your shoulder. These muscles help pull your arm across the front of your body. Injury to the pectoralis major can cause shoulder pain and limit your ability to use your arm fully.
What nerve innervates the pectoralis?
The upper part of the muscle is innervated by the lateral pectoral nerve that comes from cervical levels five, six, and seven. The lower part of the pec is innervated by the lateral and medial pectoral nerve from cervical levels five, six, seven, and thoracic level one. The blood supply to the pectoralis major comes from the pectoral branch ...
Which muscle is responsible for pulling your arm across the front of your body?
The pectoralis major helps you pull your arm across the front of your body (adduction). The muscle also works with your rotator cuff (subscapularis) to allow you to rotate your arm in.
What muscle is used to rotate the arm?
The muscle also works with your rotator cuff (subscapularis) to allow you to rotate your arm in. When your arm is fixed or bearing weight, the pectoralis major works with the latissimus dorsi and other scapular stabilizers to elevate your body.
How long does it take for a pectoralis major to heal?
This will give the tendon time to heal. The length of the initial rest period will depend on how severe the injury is, but 3 weeks is about average. 4 .
What happens if you have a pinched nerve in your neck?
A pinched nerve in your neck can injure the nerve that innervates your pectoralis major, causing muscle weakness or paralysis. Sitting with a rounded shoulder and forward head posture can put your pectoralis major muscles in a shortened position.
What is the function of the pectoralis major?
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" due to it being the largest and most superficial muscle in the chest area.
What exercises target the pectoralis major?
Exercises that include horizontal adduction and elbow extensions such as the barbell bench press, dumbbell bench press, and machine bench press induce high activation of the pectoralis major in the sternocostal region.
What are the two laminae?
This tendon consists of two laminae, placed one in front of the other, and usually blended together below: 1 The anterior lamina, which is thicker, receives the clavicular and the uppermost sternal fibers. They are inserted in the same order as that in which they arise: the most lateral of the clavicular fibers are inserted at the upper part of the anterior lamina; the uppermost sternal fibers pass down to the lower part of the lamina which extends as low as the tendon of the Deltoid and joins with it. 2 The posterior lamina of the tendon receives the attachment of the greater part of the sternal portion and the deep fibers, i. e., those from the costal cartilages.
What is the name of the muscle that makes up the bulk of the chest muscles?
The pectoralis major (from Latin pectus ' breast ') is a thick, fan-shaped or triangular convergent 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.
What is the sternalis muscle?
The sternalis muscle may be a variant form of the pectoralis major or the rectus abdominis. [Submuscular and intramuscular surgical implants (similar to breast augmentation implants) may be available from plastic surgeons to modify aesthetic contours, mass, and asymmetry or variation in both males and females.
What is the clavicular head?
Clavicular head: anterior surface of the medial half of the clavicle. Depression and abduction of the scapula. The pectoralis major (from Latin pectus ' breast ') is a thick, fan-shaped or triangular convergent muscle, situated at the chest of the human body.
Where does the clavicle come from?
It arises from the anterior surface of the sternal half of the clavicle from breadth of the half of the anterior surface of the sternum, as low down as the attachment of the cartilage of the sixth or seventh rib; from the cartilages of all the true ribs, with the exception, frequently, of the first or seventh, and from the aponeurosis of the abdominal external oblique muscle.
Course
The thoracoacromial artery arises near the axilla at the level of the suprascapular notch from the second part of the axillary artery.
Branches and supply
The thoracoacromial artery gives off four branches to supply the muscles and skin of the pectoral region; the pectoral, deltoid, clavicular and acromial branches.
What is the axillary artery?
Introduction. The axillary artery is a blood vessel that provides the axilla, the lateral portion of the thorax, and the upper limb with oxygenated blood. It consists of three parts separated by the pectoralis minor, which lies superficially to the artery. The first part is an extension of the subclavian artery.
What is the brachial plexus?
The brachial plexus’ cords are intimately associated with the axillary artery, each being named according to its position relative to the second part of the artery. [1][2] The axillary artery is a blood vessel that provides the axilla, the lateral portion of the thorax, and the upper limb with oxygenated blood.
Anatomy
Function
- The pectoralis major helps you pull your arm across the front of your body (adduction). The muscle also works with your rotator cuff(subscapularis) to allow you to rotate your arm in. When your arm is fixed or bearing weight, the pectoralis major works with the latissimus dorsiand other scapular stabilizers to elevate your body. Using your arms to ...
Associated Conditions
- While rare, a pectoralis major rupturecan happen if the amount of force applied to the muscle overloads the tendon and causes it to tear. Pectoralis muscle tears are graded according to severity.1 1. Grade I:Simple overstretching of the tendon 2. Grade II:Tendon is overstretched and partially torn 3. Grade III:Full-thickness tear of the pectoralis tendon According to published cas…
Rehabilitation
- If you think you have injured your pecs, you'll need to see your healthcare provider. A correct and timely diagnosis is the first step to treating a pectoralis major injury. If you injure your pectoralis major, you will need to rest and not move your shoulder (immobilization). This will give the tendon time to heal. The length of the initial rest period will depend on how severe the injury is, but 3 we…
A Word from Verywell
- If you've injured your pectoralis major, the first step in treating the injury is to rest. You may also need to have surgery. Once the muscle has had time to heal, working with a physical therapist will help with proper healing, and improve the range of motion and strength in your shoulder, while avoiding further injury.