11. Extensor pollicis brevis
a. The extensor pollicis brevis originates on the posterior distal surface of the radius, and inserts on the proximal posteriolateral surface of the thumb (AnatomyExpert, 2014).
b. Its main functions are to extend the metacarpal bone and the 1st phalanx (AnatomyExpert, 2014).
12. Abductor pollicis longus
a. The abductor pollicis longus originates on the middle posterior surface of the ulna and radius, and inserts onto the proximal posteriolateral end of the 1st metacarpal bone (AnatomyExpert, 2014).
b. Their main function is to abduct the thumb, but it also assists with the extension (AnatomyExpert, 2014).
13. Radial tunnel
a. The radial tunnel is located on the posterior side of the forearm along the line of the …show more content…
The deep branch provides motor innervations to the extensor carpi radialis longus/brevis, supinator, brachioradialis, extensor pollicis longus, abductor pollicis longus, extensor pollicis brevis, and extensor digitorum muscles, so you can injure the nerve without experiencing any sensor loss (Starkey, et al., 2011).
21. Subcutaneous olecranon bursa
a. The subcutaneous olecranon bursa is located between the olecranon process and the skin, and is very susceptible to trauma and infection (Starkey, et al., 2011).
22. Subtendinous olecranon bursa
a. The subtendinous olecranon bursa is located between the tendon of the triceps brachii and the olecranon process (Starkey, et al., 2011).
b. Normally, this bursa is not affected, but it may become inflamed secondary to a repetitive stress on the joint (Starkey, et al., 2011).
23. Supinator
a. The supinator originates on the lateral epicondyle/ supinator crest of ulna, and inserts onto the proximal portion of the radius (Starkey, et al., 2011).
b. This muscle aids in the motion of forearm supination (Starkey, et al., 2011).
24. Brachialis
a. The brachialis originates from the distal anterior half of the humerus, and inserts onto the coronoid process of the ulna/ulnar tuberosity (Starkey, et al.,
a. The extensor pollicis brevis originates on the posterior distal surface of the radius, and inserts on the proximal posteriolateral surface of the thumb (AnatomyExpert, 2014).
b. Its main functions are to extend the metacarpal bone and the 1st phalanx (AnatomyExpert, 2014).
12. Abductor pollicis longus
a. The abductor pollicis longus originates on the middle posterior surface of the ulna and radius, and inserts onto the proximal posteriolateral end of the 1st metacarpal bone (AnatomyExpert, 2014).
b. Their main function is to abduct the thumb, but it also assists with the extension (AnatomyExpert, 2014).
13. Radial tunnel
a. The radial tunnel is located on the posterior side of the forearm along the line of the …show more content…
The deep branch provides motor innervations to the extensor carpi radialis longus/brevis, supinator, brachioradialis, extensor pollicis longus, abductor pollicis longus, extensor pollicis brevis, and extensor digitorum muscles, so you can injure the nerve without experiencing any sensor loss (Starkey, et al., 2011).
21. Subcutaneous olecranon bursa
a. The subcutaneous olecranon bursa is located between the olecranon process and the skin, and is very susceptible to trauma and infection (Starkey, et al., 2011).
22. Subtendinous olecranon bursa
a. The subtendinous olecranon bursa is located between the tendon of the triceps brachii and the olecranon process (Starkey, et al., 2011).
b. Normally, this bursa is not affected, but it may become inflamed secondary to a repetitive stress on the joint (Starkey, et al., 2011).
23. Supinator
a. The supinator originates on the lateral epicondyle/ supinator crest of ulna, and inserts onto the proximal portion of the radius (Starkey, et al., 2011).
b. This muscle aids in the motion of forearm supination (Starkey, et al., 2011).
24. Brachialis
a. The brachialis originates from the distal anterior half of the humerus, and inserts onto the coronoid process of the ulna/ulnar tuberosity (Starkey, et al.,