AI generated article from Bing
The triceps brachii is innervated by the radial nerve, which gives off a separate branch for each head. The C6 root value of the radial nerve innervates the lateral head, root value C7 innervates the long head, and root value C8 supplies the medial head.
The triceps muscle can undergo reinnervation through a distal nerve transfer. Commonly used nerves for reinnervation include the flexor carpi ulnaris fascicle of the ulnar nerve and the posterior branch of the axillary nerve. Both of these nerves have been shown to recover the function of the triceps muscle.
However, more recent studies observed that in around 14% of individuals, the long head of the triceps brachii was innervated by the axillary nerve, and in 3% it received dual innervation from both the radial nerve and axillary nerve. [7][8]
A recent study has shown that the ulnar nerve may partially innervate the triceps’ medial head. Other studies have shown that the axillary nerve can partially innervate the long head.
There are three muscles located in the anterior compartment of the upper arm – biceps brachii, coracobrachialis and brachialis. They are all innervated by the musculocutaneous nerve. A good memory aid for this is BBC – b iceps, b rachialis, c oracobrachialis.
Action: Chief extensor of forearm; long head steadies head of abducted humerus Innervation: Radial nerve (C6, C7 and C8) Arterial Supply: Branches of deep brachial artery The medical illustrations contained in this online atlas are copyrighted © 1997 by the University of Washington.
Nerves The provision of nerve supply to the triceps is by the radial nerve (root C6, C7, and C8). However, according to the cadaveric study, it was found that the medial head of the triceps brachii could be innervated partially by the ulnar nerve.
Discover the triceps brachii muscle's origin, insertion, action, and innervation for better understanding of human anatomy.
Innervation – >comes from the posterior cord of brachial plexus -> run through the spiral groove between the lateral head and medial head of triceps -> 13cm above the trochlea , the radial nerve pierce the lateral intermuscular septum approximately 7.5cm above the trochlea . RELATIONSHIP BETWEEN RADIAL NERVE AND TRICEPS. 3 anatomical spaces. 1.
The triceps brachii muscle, often referred to simply as the triceps, is a three-headed muscle in the posterior compartment of the arm.