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Gross Anatomy > Hand Muscles > Flashcards

Hand Muscles Flashcards

1
Q

What are the attachments of the palmaris brevis

A

proximal: dermis hypothenar region
distal: palmar aponeurosis & flexor retinaculum

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2
Q

what is the torque of the palmaris brevis

A

wrinkles skin on ulnar side
improves grip

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3
Q

what innervates and supplies blood to the palmaris brevis

A

superficial branch ulnar
superficial palmar arch

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4
Q

what are the attachments of the Oppens Pollicis

A

proximal: flexor retinaculum & tubercles of scaphoid & trapezium
distal: lateral side of 1st metacarpal

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5
Q

what is the torque of the Oppens Pollicis

A

opposes thumb: pulls 1st metacarpal to center of palm & rotates thumb medially

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6
Q

what is the innervation and blood supply to the Oppens Pollicis

A

recurrent (thenar) branch of Median Nerve (C8, T1) & superficial palmar branch of radial artery

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7
Q

what are the attachments of the abductor pollicis brevis

A

proximal: flexor retinaculum & tubercles of scaphoid and trapezium
distal: lateral side of base and proximal phalanx of thumb

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8
Q

what is the torque of the abductor pollicis brevis

A

thumb abductor & helps oppose it

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9
Q

what is the innervation and blood supply to the abductor pollicis brevis

A

thenar branch of Median Nerve & superficial palmar branch of the radial artery

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10
Q

what are the attachments of the flexor pollicis brevis

A

proximal: flexor retinaculum & tubercles of scaphoid and trapezium
distal: proximal side of base and proximal phalanx of thumb

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11
Q

what is the torque of the flexor pollicis brevis

A

thumb flexor

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12
Q

what is the innervation and blood supply to the flexor pollicis brevis

A

thenar branch of median nerve & superficial palmar branch of radial artery

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13
Q

what are the 3 thenar muscles

A

abductor pollicis brevis
opponens pollicis
flexor pollicis brevis

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14
Q

what are the 3 hypothenar muscles

A

abductor digiti minimi
flexor digiti minimi
opponens digiti minimi

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15
Q

what are the attachments of the flexor digiti minimi brevis

A

proximal: hook of hamate & flexor retinaculum
distal: medial side of base of proximal phalanx of 5th digiti

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16
Q

what is the torque of the flexor digiti minimi brevis

A

flexor proximal phalanx of 5th digiti

17
Q

what innervates and supplies blood to the flexor digiti minimi brevis

A

deep branch of ulnar nerve and ulnar artery

18
Q

what are the attachments of the abductor digiti minimi

A

proximal: pisiform
distal: medial side of base of proximal phalanx of digit 5

19
Q

what is the torque of the abductor digiti minimi

A

abductor of the 5th finger

20
Q

what innervates and supplies blood to the abductor digiti minimi

A

deep branch of ulnar nerve & ulnar artery

21
Q

what are the attachments of the opponens digiti minimi

A

proximal: hook of hamate & flexor retinaculum
distal: medial boarder of the 5th metacarpal

22
Q

what is the torque of the opponens digiti minimi

A

draws 5th metacarpal anteriorly & rotates it

23
Q

what innervates and supplies blood to the opponens digiti minimi

A

deep branch of ulnar nerve and ulnar artery

24
Q

what are the attachments of the adductor pollicis

A

medial: 3rd metacarpal & capitate
lateral: medial side of base and proximal phalanx of thumb

25
Q

what is the torque of the adductor pollicis

A

adductor on thumb when abducted
oppose thub by 1st metacarpal adductor with medial rotator

26
Q

what is the innervation and blood supply to the adductor pollicis

A

deep branch of ulnar nerve & deep palmar arterial arch

27
Q

what are the attachments of the lumbricals

A

proximal: tendon of flecor digitorum profundus
distal: extensor expansion (hood)

28
Q

what is the torque of the lumbricals

A

flexor on MCP joint & extensor on IP joint

29
Q

what are the innervations of the lumbricals

A

3rd & 4th deep branch of ulnar
1st & 2nd median nerve

30
Q

what provides blood supply to the lumbricals

A

superficial palmar arch
common palmar digital arteries
deep palmar arch
dorsal digital artery

31
Q

what are the attachments of the dorsal interosseous muscles (DABs)

A

proximal: dorsal 1-4 - adjacent sides of two metacarpals
distal: extensor hood & base f proximal phalange of digits 2-4

32
Q

what is the torque of the dorsal interosseous muscles (DABs)

A

abductor on digits from axial line
assist lumbricals as flexor MCP joint & extensor

33
Q

what innervates and supplies blood to the dorsal interosseous muscles

A

deep branch of ulnar nerve & dorsal and palmar metacarpal artery

34
Q

what are the attachments of the palmar interosseous muscles (PADs)

A

proximal: palmar surfaces of 2nd, 4th and 5th metacarpals
distal: extensor hood & base of proximal phalange of digits 2,4 & 5

35
Q

what is the torque of the palmar interosseous muscles (PADs)

A

adductor on digits
assist lumbricals as flexor MCP joint & extensor IP joint

36
Q

what innervates and supplies blood to the palmar interosseous muscles

A

deep branch of ulnar nerve and palmar metacarpal arteries

Gross Anatomy (9 decks)

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