Gross Anatomy I Wet Lab Practical

what is the origin of abductor digiti quinti/minimi?

pisiform

what is the insertion of abductor digiti quinti/minimi?

proximal phalanx/digit 5

what action does abductor digiti quinti/minimi carry out?

abducts digit 5

what is the innervation of abductor digiti quinti/minimi?

ulnar nerve

what is the origin of flexor digiti quinti/minimi?

hamate

what is the insertion of flexor digiti quinti/minimi?

proximal phalanx/digit 5

what action does the flexor digiti quinti/minimi carry out?

flexes digit 5 at MP joint

what is the innervation of flexor digiti quinti/minimi?

ulnar nerve

what is the origin of opponens digiti quinti/minimi?

hamate

what is the insertion of opponens digiti quinti/minimi?

5th metacarpal

what action does opponens digiti quinti/minimi carry out?

laterally rotates 5th metacarpal

what is the innervation of opponens digiti quinti/minimi?

ulnar nerve

what are the origins of the lumbricles?

tendons of the flexor digitorum profundus muscle

what are the insertions of the lumbricles?

tendons of the extensor digitorum muscle

what actions do the lumbricles carry out?

1. flex MP joints

2. extend IP joints

What is the innervtion of the 1st and 2nd lumbricles?

median nerve

what is the innervation of the 3rd and 4th lumbricles?

ulnar nerve

what are the origins of the dorsal interossei?

2nd, 3rd, and 4th metacarpals

what are the insertions of the dorsal interossei?

proximal phalanx of digits 2, 3, and 4

what actions do the dorsal interossei carry out?

1. abduct digits 2-4

2. flex MP joints

3. extend IP joints

what is the innervation of the dorsal interossei?

ulnar nerve

what are the origins of the palmar interossei?

2nd, 3rd, 4th, and 5th metacarpals

what are the insertions of the palmar interossei?

proximal phalanx of digits 2, 4, and 5

what actions do the palmar interossei carry out?

1. adduct digits 2, 4, and 5

2. flex MP joints

3. extend IP joints

what is the innervation of the palmar interossei?

ulnar nerve

what are the origins of abductor pollicis brevis?

1. trapezium

2. scaphoid

what is the insertion of abductor pollicis brevis?

proximal phalanx/digit 1

what action does abductor pollicis brevis carry out?

abducts digit 1 at MP joint

what is the innervation of abductor pollicis brevis?

median nerve

what is the origin of opponens pollicis?

trapezium

what is the insertion of opponens pollicis?

1st metacarpal

what action does opponens pollicis carry out?

medially rotates 1st metacarpal

what is the innervation of opponens pollicis?

median nerve

what are the origins of flexor pollicis brevis?

1. trapezium

2. trapezoid

3. capitate bones

what is the insertion of flexor pollicis brevis?

proximal phalanx/digit 1

what action does flexor pollicis brevis carry out?

flexes digit 1 at MP joint

what is the innervation of flexor pollicis brevis?

1. ulnar nerve

2. median nerve

what are the origins of adductor pollicis?

1. trapezoid

2. capitate

3. 2nd metacarpal (oblique head)

4. 3rd metacarpal (oblique and transverse heads)

what is the insertion of adductor pollicis?

proximal phalanx/digit 1

what action does adductor pollicis carry out?

adducts digit 1

what is the innervation of adductor pollicis?

ulnar nerve

what are the origins of supinator?

1. lateral epicondyle/humerus

2. supinator crest/ulna

what is the insertion of supinator?

shaft/radius

what action does supinator carry out?

supinates forearm

what is the innervation of supinator?

radial nerve

what are the origins of abductor pollicis longus?

interosseous membrane

what is the insertion of abductor pollicis longus?

first metacarpal

what actions does abductor pollicis longus carry out?

1. abducts digit 1 at CM joint

2. extends digit 1

what is the innervation of abductor pollicis longus?

radial nerve

what are the origins of extensor pollicis brevis?

1. shaft/radius

2. interosseous membrane

what is the insertion of extensor pollicis brevis?

proximal phalanx/digit 1

what action does extensor pollicis brevis carry out?

extends digit 1 at MP joint

what is the innervation of extensor pollicis brevis?

radial nerve

what are the origins of extensor pollicis longus?

1. shaft/ulna

2. interosseous membrane

what is the insertion of extensor pollicis longus?

distal phalanx/digit 1

what action does extensor pollicis longus carry out?

extends digit 1 at IP joint

what is the innervation of extensor pollicis longus?

radial nerve

what are the origins of extensor indicis?

interosseous membrane

what is the insertion of extensor indicis?

proximal phalanx/digit 2

what actions does extensor indicis carry out?

extends digit 2

what is the innervation of extensor indicis?

radial nerve

what is the origin of anconeus?

lateral epicondyle/humerus

what are the insertions of anconeus?

1. olecranon process

2. posterior proximal shaft/ulna

what action does anconeus carry out?

extends forearm

what is the innervation of anconeus?

radial nerve

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

what are the origins of the flexor digitorum profundus?

1. shaft/ulna

2. interosseous membrane

what are the insertions of the flexor digitorum profundus?

distal phalanges of digits 2-5

what actions does the flexor digitorum profundus carry out?

1. flexes DIP joints of digits 2-5

2. helps flex hand

what is the innervation of the flexor digitorum profundus?

ulnar nerve and median nerve

what are the origins of the flexor pollicis longus?

interosseous membrane

what is the insertion of the flexor pollicis longus?

distal phalanx/digit 1

what action does the flexor pollicis longus carry out?

flexes the thumb (digit 1) at the IP joint

what is innervation of the flexor pollicis longus?

median nerve

what is the origin of the pronator quadratus?

distial aneterior shaft/ulna

what is the insertion of the pronator quadratus?

distal anterior shaft/radius

what actions does the pronator quadratus carry out?

1. pronation of the forearm at the inferior radio-ulnar joint

2. helps stabilize the inferior radio-ulnar joint