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Apr 29, 2023 · The radial nerve is the largest nerve of the upper limb. It originates as the terminal branch of the posterior cord of the brachial plexus. The radial nerve arises in the axillary region and descends down along the posterior surface of the humerus.
May 20, 2024 · The radial nerve innervates the muscles located in the posterior arm and posterior forearm. In the 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).
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.
The radial nerve and its branches provide motor innervation to the dorsal arm muscles (the triceps brachii and the anconeus) and the extrinsic extensors of the wrists and hands; it also provides cutaneous sensory innervation to most of the back of the hand, except for the back of the little finger and adjacent half of the ring finger (which are ...
Apr 11, 2024 · The function of your radial nerve is to supply movement (motor) and sensory information between your brain and parts of your arm, wrist and hand. The motor branch of your radial nerve stimulates the: Triceps muscles on the back of your upper arm to straighten your elbow. Muscles in the outer part of your forearm that rotate your forearm and ...
Oct 29, 2019 · bottom line = Safe zone posteriorly of 10 cm distal to the lateral acromion and 10 cm proximal to lateral epicondyle. branches in spiral groove. inferior lateral cutaneous nerve of the arm. posterior cutaneous nerve of the forearm. branch to lateral head of triceps.
Nov 5, 2023 · The median nerve innervates the digit pads of the lateral 3-1/2 fingers, while the ulnar nerve supplies the medial 1-1/2 digit pads. The radial nerve originates from the ventral rami of the spinal nerves C5 to T1 and is part of the posterior cord of the brachial plexus.
Jul 20, 2023 · The radial nerve provides sensation information from the back of the hand, forearm, and arm. Other nerves provide sensation information to other parts of the upper extremity, but the radial nerve very reliably provides sensation to the back of the hand.
Origin. The radial nerve is the thickest branch of the brachial plexus and originates from the posterior cord of the plexus. It carries fibers from the anterior rami of the fifth, sixth, seventh, and eighth cervical and the first thoracic nerves (C5-T1). Course. The radial nerve comes off from the posterior cord in the lower part of the axilla.
Oct 9, 2023 · Innervation Points : Motor: Supplies the triceps brachii, anconeus, and the extensor muscles in the posterior compartment of the forearm. Sensory: Provides sensation to the posterior surface of the arm and forearm as well as the dorsum of the hand, particularly the thumb, index, and middle fingers, and part of the ring finger. Functions.
