Muscle attachments Flashcards
Which head of triceps brachii attach to the humerus superior to radial groove?
lateral
Which head of triceps brachii attaches to the humerus inferior to radial groove?
medial
Where does the long head of triceps brachii attach to?
infraglenoid tubercle of scapula
What is the main action of brachioradialis?
flexion of elbow
What attaches at the styloid process of radius?
brachioradialis
What is the proximal attachment of brachioradialis?
lateral supracondylar ridge of humerus
What muscle has proximal attachment at lateral epicondyle and distal attachment at olecranon and posterior surface of ulna?
anconeus
What is the action of extensor carpi radialis longus and brevis?
extends abducts wrist (radial deviation)
What two muscles attach at lateral supracondylar ridge of humerus?
brachioradialis
extensor carpi radialis longus
What muscles of the superficial group of posterior forearm do not attach to lateral epicondyle of humerus?
brachioradialis
extensor carpi radialis longus
(everything else attaches there)
What is the distal attachment of extensor carpi radialis longus?
dorsal base of MC II
What is the distal attachment of extensor carpi radialis brevis?
dorsal base of MC III
What is the distal attachment of extensor carpi ulnaris?
dorsal base of MC V
What is the distal attachment of extensor digitorum?
extensor expansion (2-5)
What is the distal attachment of extensor digiti minimi?
extensor expansion of digit 5
Do extensor digitorum and digiti minimi work on all joints of digits 2-5?
yes
What muscle has the following attachments?
lateral epicondyle + posterior olecranon process
proximo-lateral radius
supinator
What’s the function of EPL and EPB?
extends the pollex
What is the slight difference in function between EPL and EPB?
EPL acts on all joints
EPB does not act on the most distal
