What is the antagonist of the pectoralis major?
What is the antagonist of the pectoralis major?
| Pectoralis major | |
|---|---|
| Antagonist | Deltoid muscle, Trapezius |
| Identifiers | |
| Latin | Musculus pectoralis major |
| TA98 | A04.4.01.002 |
What does the pectoral muscle do?
The pectoralis major extends across the upper part of the chest and is attached to a ridge at the rear of the humerus (the bone of the upper arm). Its major actions are adduction, or depression, of the arm (in opposition to the action of the deltoideus muscle) and rotation of the arm forward about the axis of the body.
What does pectoral mean in medical terms?
chest
adjective. of, in, on, or pertaining to the chest or breast; thoracic. worn on the breast or chest.
What is the gluteus maximus antagonist?
Table 2
| Muscle | Action | Antagonist |
|---|---|---|
| Gluteus maximus | Hip extension | Psoas, Rectus Femoris |
| Gluteus medius | Hip abduction | Psoas, Adductors |
How is pectoralis major named?
An example of a muscle named for its location is the muscle pectoralis major, where ‘pectoral’ is a word that means relating to the chest. So, the name itself tells us this muscle is located on the chest. You know these muscles as the ‘pecs’ that you might work out at a gym.
What nerve controls the pectoralis major?
lateral pectoral nerve
Innervation of the Pectoralis Major The lateral pectoral nerve arises from the lateral cord of the brachial plexus and is composed of branches of C5, C6, and C7. It provides control of the clavicular head and cross-innervates the sternocostal head of the muscle.
Where is the pectoral region?
upper chest
The pectoral region is the anterior region of the upper chest where there are four thoracoappendicular muscles (also known as the pectoral muscles): pectoralis major.
What is a pectoral injury?
A pectoralis major strain typically occurs when the muscle is forcibly contracted whilst in a stretched position. This can occur during weight training when performing bench press exercises. When the bar is lowered, the pectoralis major muscle is stretched across the chest.
What are pectoralis major?
The pectoralis major is the superior most and largest muscle of the anterior chest wall. It is a thick, fan-shaped muscle that lies underneath the breast tissue and forms the anterior wall of the axilla. The insertion of the pectoralis major is at the lateral lip of the intertubercular sulcus of the humerus.
What is the armpit muscle called?
Pectoralis major: This large fan-shaped muscle stretches from the armpit up to the collarbone and down across the lower chest region. It connects to the sternum (breastbone).