Superficial muscles of dorsal forearm Flashcards
What are the superficial dorsal MM?
Anconeus Brachiradialis extensor carpi radialis (Longus & brevis) Extensor carpi ulnaris Extensor digitorum extensor digiti minimmi
What are the attachments of the aconeus M?
lateral epicondyle to olecrenon process
What is the action of the aconeus M?
Helps extend forearm
helps to prevent excess motion of the ulna during pronation.
What are the attachments of the Brachioradialis M?
lateral supracondylar ridge to distal radius (near styloid process)
What is the action of brachiradialis M?
moves hand to neutral position (between supination and pronation)
once there assist in flexion of forearm at elbow
What are the attachments for Extensor carpi radialis longus?
lateral supracondylar ridge to base of 2nd and 3rd metacarpal
What is the action of extensor carpi radialis longus?
assist in extension and radial deviation at wrist
What are the attachments of the Extensor carpi radialis btrevis?
lateral epicondyle to base of 2nd and 3rd metacarpals
What is the action of extensor carpi radialis brevis?
assist in extension and radial deviation at wrist
What are the attachments for Extensor carpi ulnaris?
lateral epicondyle to base of 5th metacarpal
What is the action of extensor carpi ulnaris?
assist in extension
ulnar deviation of wrist
What are the attachments of Extensor digitorum M?
lateral epicondyle and adjacent fascia to extensor tendon system of digits 2-5
What is the action extensor digitorum M?
extends the phalanges of 2-5
most efficient at the metacarpophalangeal joints and interphangeal joints
What are the attachments of the Extensor digiti minimmi M?
lateral epicondyle to common extensor tendon of the 5th digit
may absent or have split tendon
What is the innervation of all superficial posterior muscles ?
Radial N
exception: extensor digiti minimmi, extensor digitorum extensor carpu radialis brevis innervated bi deep radial (posterior interosseous)
extensor carpi ulnaris may be either
