Bicep Muscles Anatomy
Location of the biceps muscle
The biceps lies on the front of the upper arm between the shoulder and the elbow.
The heads of the biceps muscle
Both heads of the biceps arise on the scapula. They join to form a single muscle belly which is attached to the upper forearm.
Functions of the biceps muscle
The biceps crosses both the shoulder and elbow joints. Its main function is at the elbow where it flexes the forearm and supinates the forearm.
Both these movements are used when opening a bottle with a corkscrew:
First the biceps unscrews the cork (supination/palm upwards)
Then it pulls the cork out (flexion/bends upward at the elbow) (Wikipedia, 2022).
Simple definitions of supination and flexion
To supinate is to turn the palms upward (Merriam-Webster, 2022).
Supintaion is the rotation of the forearm and hand so that the palm faces forward or upward (Merriam-Webster, 2022).
Flexion is a bending movement around a joint in a limb (such as the knee or elbow). This bending decreases the angle between the bones of the limb at the joint (Merriam – Webster, 2022).