Where are your triceps muscles located in body?

Triceps muscles are located in the back of your upper arm. They are made up of three heads: the long head, the lateral head, and the medial head. The long head originates from the scapula (shoulder blade), while the lateral and medial heads originate from the humerus (upper arm bone). All three heads insert into the ulna (one of the two bones in the forearm).

The triceps muscles are responsible for extending the elbow joint. This is the action of straightening your arm at the elbow. They are also involved in adducting (bringing towards the midline of the body) the arm at the shoulder joint.

Here is a more detailed description of the location of each of the three triceps heads:

* Long head: The long head of the triceps originates from the infraglenoid tubercle on the scapula. This is a bony projection located on the underside of the shoulder blade. The long head then runs down the back of the upper arm and joins with the other two heads of the triceps to insert into the ulna.

* Lateral head: The lateral head of the triceps originates from the lateral (outer) surface of the humerus. It runs down the back of the upper arm and joins with the other two heads of the triceps to insert into the ulna.

* Medial head: The medial head of the triceps originates from the medial (inner) surface of the humerus. It runs down the back of the upper arm and joins with the other two heads of the triceps to insert into the ulna.

The triceps muscles are innervated by the radial nerve. This is a nerve that originates from the spinal cord in the neck and runs down the arm. The radial nerve provides motor innervation to the triceps muscles, which means that it is responsible for controlling their movement.