The hand Flashcards by Carl Rodgers

What are the extrinsic muscles of the hand?

(flexors)
flexor carpi radialis
palmaris longus
flexor carpi ulnaris
flexor digitorum superficialis

(extensors)
extensor digitorum
extensor digiti minimi
extensor carpi ulnaris
extensor carpi radialis longus
extensor carpi radialis brevis

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What are the thenar muscles of the hand

opponens pollicis
abductor pollicis brevis
flexor pollicis brevis
adductor pollicis

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What are the hypothenar muscles of the hand

abductor digiti minimi
flexor digiti minimi brevis
opponens digiti minimi

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What are the short muscles of the hand

lumbricals 1-4
dorsal interossei
palmar interossei

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Describe opponens pollicis

O: flexor retinaculum + tubercles of scaphoid + trapezium
A: lateral side of 1st metacarpal
I: recurrent branch of median nerve (C8, T1)
Fn: opposes thumb

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What is the origin of opponens pollicis

flexor retinaculum + tubercles of scaphoid + trapezium

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What is the attachment of opponens pollicis

lateral side of 1st metacarpal

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What is the innervation of opponens pollicis

recurrent branch of median nerve (C8, T1)

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What is the fn of opponens pollicis

opposes thumb

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Describe abductor pollicis brevis

O: flexor retinaculum + tubercles of scaphoid and trapezium
A: lateral side of base of prox. phalanx of thumb
I: recurrent branch of the median nerve (C8, T1)
Fn: abduction of thumb

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What is the origin of abductor pollicis brevis

flexor retinaculum + tubercles of scaphoid and trapezium

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What is the attachment of abductor pollicis brevis

lateral side of base of prox. phalanx of thumb

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What is the innervation of abductor pollicis brevis

recurrent branch of the median nerve (C8, T1)

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What is the function of abductor pollicis brevis

abduction of thumb

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Describe flexor pollicis brevis

O: flexor retinaculum + tubercles of scaphoid and trapezium
A: lateral side of base of prox. phalanx of thumb
I: recurrent branch of median nerve (C8, T1)
Fn: flexes thumb

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What is the attachment of flexor pollicis brevis

lateral side of base of prox phalanx of thumb

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What is the origin of flexor pollicis brevis

flexor retinaculum + tubercles of scaphoid and trapezium

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What is the innervation of flexor pollicis brevis

recurrent branch of the median nerve (C8, T1)

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What is the function of flexor pollicis brevis?

flexion of thumb

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Describe adductor pollicis

O: (oblique head) bases of 2nd and 3rd metacarpals
(transverse head) ant. surface of shaft of 3rd metacarpal
A: medial side of base of proximal phalanx of thumb
I: deep branch of ulnar nerve (C8, T1)
Fn:: adducts thumb

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What is the origin of adductor pollicis

(oblique head) bases of 2nd and 3rd metacarpals

(transverse head) ant. surface of shaft of 3rd metacarpal

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What is the attachment of adductor pollicis

medial side of base of proximal phalanx of thumb

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What is the innervation of adductor pollicis ?

deep branch of ulnar nerve (C8, T1)

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What is the function of adductor pollicis?

adduction

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Describe abductor digiti minimi

O: pisiform A: medial side of base of prox. phalanx of 5th metacarpal I: deep branch of ulnar nerve (C8, T1) Fn: abducts 5th finger

What is the attachment of abductor digiti minimi

medial side of base of proximal phalanx of 5th metacarpal

What is the origin of abductor digiti minimi

pisiform

What is the innervation of abductor digiti minimi

deep branch of ulnar nerve (C8, T1)

What is the function of abductor digiti minimi

abducts 5th finger

Describe flexor digiti minimi brevis

O: hook of hamate A: medial side of base of prox phalanx of 5th finger I: deep branch of ulnar nerve (C8, T1) Fn: flexes proximal phalanx at 5th finger

What is the origin of flexor digiti minimi brevis

hook of hamate

What is the attachment of flexor digiti minimi brevis

medial side of base of prox phalanx of 5th finger

What is the innervation of flexor digiti minimi brevis

deep branch of ulnar neve (C8, T1)

What is the function of flexor digiti minimi brevis

flexion of prox. phalanx at 5th finger

Describe opponens digiti minimi

O: hook of hamate A: medial border of 5th metacarpal I: deep branch of ulnar nerve (C8, T1) Fn: brings 5th finger anterior for opposition w/ thumb

What is the origin of opponens digiti minimi

hook of hamate

What is the attachment of opponens digiti minimi

medial border of 5th metacarpal

What is the innervation of opponens digiti minimi

deep branch of ulnar nerve (C8, T1)

What is the function of opponens digiti minimi

brings pinky anterior for opposition w/ thumb

Describe lumbricals 1-2

O: lateral 2 tendons of flexor digitorum profundus A: lateral sides of extensor expansions of 2-5 fingers I: median nerve (C8, T1) Fn: flex metacarpalphalangeal joints

What is the origin of lumbricals 1-2

lateral 2 tendond of flexor digitorum profundus

What is the attachment of lumbricals 1-2

lateral sides of extensor expansions of 2-5 fingers

What is the innervation of lumbricals 1-2

median nerve (C8, T1)

What is the function of lumbricals 1-2

flex metacarpalphalangeal joints

Describe lumbricals 3-4

O: medial 3 tendons of flexor digitorum profundus A: lateral sides of extensor expansions of 2-5 fingers I: deep branch of ulnar nerve (C8, T1) Fn: flex the metacarpalphalangeal joints

What is the origin of lumbricals 3-4

medial 3 tendons of flexor digitorum profundus

What is the attachment of lumbricals 3-4

lateral side of extensor expansions of 2-5 fingers

What is the innervation of lumbricals 3-4

deep branch of ulnar nerve (C8, T1)

What is the function of lumbricals 3-4

flex the metacarpalphalangeal joints

Describe dorsal interossei

O: adjacent side of 2 metacarpals A: bases of prox. phalanges I: deep branch of ulnar nerve (C8, T1) Fn: abduct 2nd to 4th fingers

What is the origin of dorsal interossei

adjacent side of 2 metacarpals

What is the attachment of dorsal interossei

bases of prox phalanges

What is the innervation of dorsal interossei

deep branch of ulnar nerve (C8, T1)

What is the function of dorsal interossei

abduction of 2nd-4th fingers

Describe palmar interossei

O: palmar surfaces of 2nd, 4th and 5th metacarpals A: bases of prox phalanges of 2nd, 4th and 5th metacarpals I: deep branch of ulnar nerve (C8, T1) Fn: adduct towards middle finger

What is the origin of palmar interossei

palmar surfaces of 2nd, 4th and 5th metacarpals

What is the attachment of palmar interossei

bases of prox phalanges of 2nd, 4th and 5th metacarpals

What is the innervation of palmar interossei

deep branch of ulnar nerve (C8, T1)

What is the function of palmar interossei

adduction towards middle finger

How do you test palmar interossei

squeeze bit of paper between fingers and try and grip it

How do you test dorsal interossei

try and abduct fingers against resistance

The hand Flashcards

(61 cards)