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Anatomy > HAND > Flashcards

HAND Flashcards

1
Q

Palmaris brevis

superficial muscle, goes across palm towards thumb

A

I

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2
Q

name the three thenar muscles

all 3 are brevis

A
  1. abductor pollicis brevis (lateral)
  2. flexor pollicus brevis (medial)
  3. oppenens pollicis (deep to 1 & 2)
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3
Q

abductor pollicis brevis

A

O: 1. tubercles of scaphoid and trapezium
2. flexor retinaculum

I: Lateral side of proximal phalanx of thumb. Tendon contains a sesamoid bone (bone within a tendon)

A; abducts thumb

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4
Q

flexor pollicis brevis

AFO

A

O: 1.. tubercle of trapezium

2.  flexor retinaculum

I: lateral side of proximal phalanx of thumb. tendon may contain a sesamoid bone in common with abductor pollicis brevis

A: flexes thumb

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5
Q

Opponens Pollicis

little deep guy

A

O: Tubercle of trapezium & flexor reticulum

I: lateral side of metacarpal 1

A: opposition of thumb

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6
Q

adductor pollicis

*NOT in thenar eminence

A

O: 1. origin of oblique head: bases of metacarpals 2 & 3

  1. origin of transverse head; shaft of metacarpal 3

I: base of proximal phalanx of thumb (tendon contains a sesamoid bone)

A: adducts thumb

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7
Q

3 hyporthenar muscles to little finger:

mirror image of thenar muscles

A
  • all digiti minimi
    1. abductor digiti minimi
    2. flexor digiti minimi
    3. opponens digiti minimi
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8
Q

abductor digiti minimi

ulnar one

A

O: pisiform bone

I: medial side of proximal phalanx of digit 5

A: abducts little finger

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9
Q

flexor digiti minimi

2nd in from ADM

A

O: hook of hamate and flexor retinaculum

I: medial side of proximal phalanx of digit 5

A: flexion of little finger

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10
Q

opponens digiti minimi

deep of 1& 2

A

O: hook of hate and flexor retinaculum

I: metacarpal 5

A: Laterally rotates metacarpal 5 to oppose little finger with thumb

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11
Q

Lumbricals

have bipenate lumbricals 3 & 4

&

unipennate lumbricals 1 & 2

A

O: tendons of flexor digitorum profundus

I; lateral sides of extensor expansions of digits 2-5

A: flexion of MP joint & extension of PIP and DIP joints

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12
Q

interosseous

DAB

  • these are between metacarpals where lumbricals are around digits
A

O: Adjacent sides of metacarpals at interosseous spaces

I:

  1. Extensor expansions of digits 2, 3,4 (not 1 & 5)
  2. proximal phalanges of digits 2, 3, 4 ( not 1 & 5)

A: 1. abduction away from axis through middle finger

  1. flexion of MP and extension of PIP and DIP joints (like lumbricals)
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13
Q

Palmar interosseous (unipennate muscles)

PAD

A

O: Metacarpals 1,2,4, 5 (no 3)

I: 1. proximal phalanges of all digits (except digit 3)

  1. extensor expansions of all digits (except 3)

A: 1. flexion of MP JOINt
2. extension of PIP and DIP joints (just like lumbricals)

  1. adduction of fingers to plane through middle finger
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14
Q

What phalanx has the bipennate lumbricals?

A

3 & 4

these are unique because they originate on the tendon of another muscle

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15
Q

What phalanx has the unipennate lumbricles

A

1 & 2 these are unique because they originate on the tendon of another muscle

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16
Q

Actions of lumbricals

A
  1. flexion of MP joint

2. extension of PIP & DIP

17
Q

4 dorsal interosseous

A

originate: adjacent sides of metacarpals at interosseous spaces
inserts: not 1 & 5 but 2,3,4 extensor expansion & 2,3,4 of proximal phalanges

18
Q

interosseous means

A

between bones

19
Q

superficial palmar arch

& there is a deep palmer arch

A

arch along metacarpals

medial 3.5 is ulnar
lateral 1.5 is radial

deep palmer arch is a the base

20
Q

name proximal to distal on ulnar artery 3.5

A

1st palmar digital artery that’s it if it doesn’t branch

if it branches we have the common palmar digital artery
into proper palmer digital arteries

21
Q

name proximal to distal on radial 1.5

A

1st palmar branch of radial artery
if thumb then princeps pollicis
if index then radials indicis

22
Q

arteries at dorsum of hand

A

proximal to distal

radial artery in snuffbox
radial artery penetrating 1st dorsal interosseous to enter palm of hand (first branch)

Dorsal Carpal arch goes toward pinky, branches fto dorsal metacarpal arteries & then dorsal digital arteries.

dorsal digital artery toward thumb

23
Q

superficcial palmar arch

A

same spot as proximal transverse crease (gypsy crease)

24
Q

deep palmar arch

A

halfway between distal & proximal transverse crease

25
Q

dorsal cutaneous branch of ulnar

A

goes deep around the pronator quadratus

26
Q

palmar cutaneous brand of ulnar

A

branches mid forearm and goes lateral to ulnar nerve at carpal tunnel

27
Q

ulna has a deep branch and a superficial branch

A
  • superficial branch- skin of medial 1.5 digits, skin of distal 1/3 of palm, & palmaris brevis
  • deep branch of ulnar nerve passes into hypothenar muscles

deep branch of ulnar nerve innervates 1. hypothenar muscles, medial 2 lumbricals, all interosseous muscles, adductor pollicis.

28
Q

radial nerve doesn’t have what on the hand?

A

no motor innervation to hand muscles

29
Q

radial nerve

A

think surfing glove

30
Q

median nerve on hand

A

dorsal- tips of 1-3.5 (half of 4 and nothing on 5th)

Palmer- 1-3.5 and root

31
Q

describe median nerve around flexor retinaculum

A

median nerve will have a branch right before FR called the palmar cutaneous branch of median nerve.

median nerve continues through carpal tunnel and branches into digital branches of median nerve. but before that branch there one branches to the pollicis call the recurrent branch of median nerve innervates thenar muscles.

32
Q

median nerve motor innervation for what muscles of hand

A

all 3 thenar by recurrent branch of median nerve

& lateral 2 lumbricals

33
Q

median nerve sensory innervation by median nerve

A
  1. lateral 3.5 digits (palmar side) and dorsum of their nail beds
  2. lateral 2/3rds of palm of hand

Anatomy (11 decks)

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