Lateral root of median nerve

Lateral Root of Median Nerve

Diagram of the brachial plexus. The lateral root of the median nerve is shown in red.

The Lateral Root of Median Nerve is a significant component of the Median Nerve, one of the five main nerves running from the brachial plexus. It is formed by the union of two roots: the lateral root and the medial root.

Anatomy

The lateral root of the median nerve originates from the lateral cord of the brachial plexus, carrying fibers from the C5, C6, and C7 spinal nerves. It unites with the medial root, which carries fibers from the C8 and T1 spinal nerves, to form the median nerve in the axilla.

Function

The lateral root of the median nerve, through the median nerve, supplies motor and sensory innervation to parts of the forearm and hand. It is particularly important for the functioning of the thumb and the index finger.

Clinical Significance

Damage to the lateral root of the median nerve can result in a variety of symptoms, including paresthesia (tingling or numbness), pain, and muscle weakness in the forearm and hand. This can significantly affect a person's ability to perform fine motor tasks.

See Also

• Median nerve
• Brachial plexus
• Medial root of median nerve