|
SPORTS ANATOMY LESSON #8
Forearm Extensors
The extensors of the forearms are a group of two muscles located in the posterior arm region on both sides of the body. Their names are: 1) Triceps Brachii and 2) Anconeus. These muscles are shown in Figure 1 below:
Figure 1. The extensors of the forearms.
INNERVATION (NERVE SUPPLY)
The triceps muscle is suppled by the radial nerve (C6, C7 and C8) which is a branch from the musculo-spiral nerve and the anconeus muscle is also supplied by the radial nerve (C7, C8 and T1) which too is a branch from the musculo-spiral nerve. See Figure 2 below:
Figure 2. The brachial plexus.
Musculo-spiral nerve: Branches C6, C7 and C8 supply the triceps brachii muscle.
Branches C7, C8 and T1 supply the anconeus muscle.
|
"LifeART (and/or) MediClip image copyright (2005) Lippincott Williams & Wilkins. All rights reserved." |
Function
The triceps and anconues muscles main function is to extend the forearm. This occurs during athletic movements such as swinging a golf club, shooting a basketball, throwing a baseball or football and boxing. See Figure 3 below:
|
Starting Postion
|
Ending Position |
Forearm extension.
L/R triceps brachii and L/R anconeus.
LEARN ABOUT:
Always glad to help, and remember, at AthleticQuickness.com, We'll bring you up to speed!
| 
