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Muscles of the Upper Limb. Definitions: Facet: a small smooth area on a bone or other firm structure. Fossa: a depression usually more or less longitudinal in shape below the level of the surface of a part. Pollicis: the thumb. Tubercle: a nodule.
In this article, we shall look at the anatomy of the muscles of the upper arm â their attachments, innervation and actions. There are three muscles located in the anterior compartment of the upper arm â biceps brachii, coracobrachialis and brachialis. They are all innervated by the musculocutaneous nerve. A good memory aid for this is BBC â biceps, brachialis, coracobrachialis.