Human body anatomy Radial nerve Muscle and nerve Biology Diagrams

Human body anatomy Radial nerve Muscle and nerve Biology Diagrams Radial nerve. The radial nerve arises from ventral rami of C5 to C8 (+/- T1) and is a continuation of the posterior cord of the brachial plexus and is the largest branch of the brachial plexus, innervating almost the entire posterior side of the upper limb and provides a motor function to the extensor muscles of the forearm, wrist, fingers, and thumb.

The radial nerve is one of the terminal branches of the posterior cord. In the axilla, it lies behind the axillary and upper brachial arteries and passes anterior to the tendons of teres minor, latissimus dorsi and subscapularis.It enters the posterior compartment of the arm passing through a triangular space, formed by the lateral humerus, long head of triceps and teres minor. Motor function. The radial nerve innervates the muscles located in the posterior upper arm and posterior forearm. In the upper arm, it innervates the three heads of the triceps brachii - which acts to extend the arm at the elbow. The radial nerve also gives rise to branches that supply the brachioradialis and extensor carpi radialis longus (muscles of the posterior forearm).

Radial Nerve Biology Diagrams

The radial nerve is a nerve in the human body that supplies the posterior portion of the upper limb.It innervates the medial and lateral heads of the triceps brachii muscle of the arm, as well as all 12 muscles in the posterior osteofascial compartment of the forearm and the associated joints and overlying skin.. It originates from the brachial plexus, carrying fibers from the posterior roots

superficial branch radial nerve; dorsal digital branch; Origin: Radial nerve originates from the posterior cord of the brachial plexus (C5-T1) behind axillary artery; Course: Posterior wall axilla. courses on the posterior wall of the axilla (on subscapularis, latissimus dorsi, teres major) 3 Branches in axilla. posterior cutaneous nerve of the arm

Radial nerve Biology Diagrams

Your radial nerve takes a winding path from your lower armpit to some of your fingers. It allows you to move muscles and feel skin sensations in certain parts of your upper arm, forearm, wrist and hand. Like other peripheral nerves in your body, your radial nerve can become damaged, causing symptoms like pain and muscle weakness.