Gross Anatomy I Lecture - Superficial posterior forearm muscles
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24 Terms
what is the origin of the brachioradialis?
lateral supracondylar ridge/humerus
what is the insertion of the brachioradialis?
styloid process/radius
what actions does the brachioradialis carry out?
1. helps flex forearm
2. pronates the forearm
3. supinates the forearm
what is the innervation of the brachioradialis?
radial nerve
what is the origin of the extensor carpi radialis longus?
lateral epicondyle/humerus
what is the insertion of the extensor carpi radialis longus?
second metacarpal
what actions does the extensor carpi radialis longus carry out?
1. extends the hand
2. abducts the hand
what is the innervation of the extensor carpi radialis longus?
radial nerve
what is the origin of the extensor carpi radialis brevis?
lateral epicondyle/humerus
what is the insertion of the extensor carpi radialis brevis?
third metacarpal
what actions does the extensor carpi radialus brevis carry out?
1. extends the hand
2. abducts the hand
what is the innervation of the extensor carpi radialis brevis?
radial nerve
what is the origin of the extensor digitorum (maximus)?
lateral epicondyle/humerus
what are the insertions of the extensor digitorum (maximus)?
middle and distal phalanges of digits 2-5
what actions does the extensor digitorum (maximus) carry out?
1. extends digits 2-5
2. extends the hand
what is the innervation of the extensor digitorum (maximus)?
radial nerve
what is the origin of the extensor digiti minimi?
lateral epicondyle/humerus
what is the insertion of the extensor digiti minimi?
proximal phalanx/digit 5
what action does the extensor digiti minimi carry out?
extends digit 5 (little finger)
what is the innervation of the extensor digiti minimi?
radial nerve
what are the origins of the extensor carpi ulnaris?
1. lateral epicondyle/humerus
2. shaft/ulna
what is the insertion of the extensor carpi ulnaris?
5th metacarpal
what actions does the extensor carpi ulnaris carry out?
1. extends hand
2. helps adduct hand
what is the innervation of the extensor carpi ulnaris?
radial nerve
Note 
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