What is the origin and insertion of the triceps Brachii?

The triceps brachii muscle consists of a long, medial and lateral head, that originate from their respective attachments on the humerus and scapula, and insert via a common tendon on the ulna. The main function of triceps brachii is extension of the forearm at the elbow joint.

What is the origin of triceps femoris?

The muscle fibers converge towards a thick tendon which inserts into the base of patella. Occasionally, the rectus femoris can have a third head that originates from the iliofemoral ligament.

Origin and insertion.

Origin Anterior inferior iliac spine, supraacetauluar groove
Innervation Femoral nerve (L2-L4)

What are the three parts of the triceps Brachii?

The Triceps brachii (Triceps; Triceps extensor cubiti) is situated on the back of the arm, extending the entire length of the dorsal surface of the humerus. It is of large size, and arises by three heads (long, lateral, and medial), hence its name.

What is the function of triceps?

With the arm adducted, the triceps muscle acts to hold the head of the humerus in the glenoid cavity. This action helps prevent any displacement of the humerus. The long head also assists with the extension and adduction of the arm at the shoulder joint.

What is the origin of the triceps?

Triceps brachii muscle

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Origins Long head – infraglenoid tubercle of the scapula Medial head – posterior surface of the humerus (inferior to radial groove) Lateral head – posterior surface of the humerus (superior to radial groove)
Innervation Radial nerve (C6-C8)

What nerve controls the triceps?

The triceps brachii muscle is the sole muscle occupying the posterior compartment of the upper arm and is innervated by the radial nerve (C6–C8). It is composed of three tendinous origins: the long, lateral, and medial heads. The long head originates at the infraglenoid tuberosity of the scapula.

What is the biggest part of the triceps muscle called?

The Long head is the largest part of the triceps and runs down the back of your arm. The MEDIAL head is on the middle of the triceps, as the name suggests. The LATERAL head is on the outside of the arm, and while it is the smallest of the three, it is what helps to give that strived-for “horseshoe” shape.

Are triceps important?

The triceps are essential for building upper body strength and helping with movement in your shoulders and elbows. Increasing triceps strength brings stability to your shoulders and arms, improves flexibility, and increases range of motion.

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