Muscles in the Arm

muscles in the arm

There are several muscles in the arm, such as the biceps brachii and triceps. But before you begin exercising these muscles, it is helpful to understand the function of these muscles. They play a key role in arm strength, as well as in daily life. Here’s a brief description of the muscles that you should target. These include the palmaris longus, teres major, and biceps brachii.

biceps brachii

The biceps brachii muscles are located in the anterior compartment of the arm. The long head of the muscle originates on the supraglenoid tubercle of the scapula. It passes through the intertubercular groove of the proximal humerus and inserts on the radial tuberosity. The biceps brachii muscle extends distally. It assists the shoulder in flexion. Its short head is attached to the coracoid process of the scapula.


The triceps muscles in the arm are three-headed and make up the posterior group of muscles in the arm. This group of muscles attaches to the humerus through a common tendon on the ulna. The three heads of the triceps muscle have different functions and originate from different locations on the humerus. Triceps brachii muscle exercises are designed to exercise the triceps.

teres major

The teres major and minor muscles of the arm are located on opposite sides of the shoulder blade. The teres major is the larger of the two, with a tender tip on the front part. The teres minor is located on the back edge of the arm pit. They are very similar in size and are usually treated the same way. The following exercises are intended to release the teres major.

palmaris longus

The palmaris longus muscle is a weak wrist flexor with several variations. In men, it may have a double muscle belly; in women, it may be absent. It arises from the medial epicondyle of the humerus and projects as part of the superficial anterior compartment of the forearm. It lies over the transverse carpal ligament and inserts into the palmar aponeurosis.

flexor carpi ulnaris

The flexor carpi ulnaris muscle originates in the proximal portion of the olecranon and inserts onto the hamate and pisiform carpal bones of the distal forearm. The muscle and its tendons are usually referred to as flexors. Various exercises are performed by contracting or distending these muscles.

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