Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

1022 ANATOMY > Week 11 Hand and fingers > Flashcards

Week 11 Hand and fingers Flashcards

1
Q

joint classification of carpometacarpal (CMC) and intermetacarpal joints

A

thumb – synovial saddle
fingers (2-5) – synovial plane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

bones and articular surface of carpometacarpal and intermetacarpal joints

A

thumb: base of metacarpal and trapezium
fingers 2-5: base of metacarpals and distal row of carpal bones, intermetacarpal bones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

fibrous capsule of carpometacarpal and intermetacarpal joints

A
  • continuous CMC 2-5
  • thumb separate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

ligaments of carpometacarpal and intermetacarpal joints

A

thumb:
- radial carpometacarpal
- anterior/ posterior oblique

fingers 2-5:
- palmar carpometacarpal
- dorsal carpometacarpal
- interosseous carpometacarpal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

movements (stability) of carpometacarpal and intermetacarpal joints

A
  • thumb is extremetly mobile:
    flexion/ extension
    abduction/ adduction
    circumduction
    opposition
  • minimal movement in digits 2-3
  • 5th finger is moderately mobile
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

joint classification of metacarpophalangeal joints

A

synovial condyloid joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

bones and articular surface of metacarpophalangeal joints

A
  • head of metacarpals and bases of proximal phalanges
  • sesamoid bones articulating with head of 1st metacarpal
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

ligaments of metacarpophalangeal joints

A

1. collateral
- proper (cord-like) 繩狀 and accessory (fan-shaped)
- Extension: proper collateral ligament lax = permit abduction by interossei
- Flexion: proper collateral ligament taut = prevents unwanted abduction of MC heads during grip

2. volar/ palmar plate (ligament)
- fibrocartilage
- increase stability and congruency
- prevents hyperextension

  1. deep transverse metacarpal
  2. extensor expansions (dorsal hood)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

movements of metacarpophalangeal joints

A

flexion/ extension
abdcution/ adduction
circumduction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

joint classification, bone and articular surfaces of interphalangeal joints

A
  • synovial hinge joint
  • median ridge
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

ligaments of interphalangeal joints

A
  • collateral
  • volar/ palmar plate (ligament)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

movements of interphalangeal joints

A
  • flexion: PIP (0-130 degrees), DIP (70-90 degrees)
  • extension: volar plates and collateral ligs taut
  • axis of movement is oblique, fingers move toward base of thumb, facilitating 方便 grasp and opposition
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

deep fascia of the hand

A
  • binding of the skin creases 摺痕 to the deep fasica
  • palmar aponeurosis (thick, central part of palmar fascia)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

organisation of the palm

A

septa creating: hypothenar (medial), central and thenar (lateral) compartments
central further divided: midpalmar and thenar spaces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what are the three muscles of the thnear

A

abductor pollicus brevis
flexor pollicus brevis
opponens pollicis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

proximal, distal attachment, innervation and main action of abductor pollicis brevis

A

proximal: flexor retinaculum and tubercles of scaphoid and trapezium
distal: lateral side of base of proximal phalanx of thumb
innervation: recurrent branch of median nerve (C8, T1)
main action: abducts thumb, helps oppose it

17
Q

proximal, distal attachment, innervation and main action of flexor pollicis brevis

superficial and deep head

A

proximal: flexor retinaculum and tubercles of scaphoid and trapezium
distal: lateral side of base of proximal phalanx of thumb
innervation:
- superficial head: recurrent branch of median nerve (C8, T1)
- deep head: deep branch of ulnar nerve (C8, T1)
main action: flexes thumb

18
Q

proximal, distal attachment, innervation and main action of opponens pollicis

A

proximal: flexor retinaculum and tubercle of scaphoid and trapezium
distal: lateral side of 1st metacarpal
innervation: recurrent branch of median nerve (C8, T1)
main action: oppose thumb, it draws metacarpal medially to center of palm and rotates it medially

19
Q

proximal, distal attachment, innervation and main action of adductor pollicis

oblique and transverse head

A

proximal:
- oblique head: bases of 2nd and 3rd metacarpals, capitate and adjacent carpals
- transverse head: anterior surface of shaft of 3rd metacarpal

distal: medial side of base of proximal phalanx of thumb
innervation: deep branch of ulnar nerve (C8, T1)
main action: adducts thumb toward lateral border of palm

APB, FPB – distal attachment: lateral side of base of proximal phalanx of thumb

20
Q

what are the three muscles of hypothenar

A

abductor digiti minimi
flexor digiti minimi brevis
opponens digiti

21
Q

proximal, distal attachment, innervation and main action of abdcutor digiti minimi

A

proximal: pisiform
distal: medial side of base of proximal phalanx of 5th digit
innervation: deep branch of ulnar nerve (C8, T1)
main action: abducts 5th digit, assists in flexion of its proximal phalanx

22
Q

proximal, distal attachment, innervation and main action of flexor digiti minimi brevis

A

proximal: flexor retinaculum and hook of hamate
distal: medial side of base of proximal phalanx of 5th digit
innervation: deep branch of ulnar nerve (C8, T1)
main action: flexes proximal phalanx of 5th digit

23
Q

proximal, distal attachment, innervation and main action of opponens digiti

A

proximal: flexor retinaculum and hook of hamate
distal: medial border of 5th metacarpal
innervation: deep branch of ulnar nerve (C8, T1)
main action: draws 5th metacarpal anterior and rotates it, bringing 5th digit into opposition with thumb

24
Q

proximal, distal attachment, innervation and main action of lumbricals

1st - 2nd digit

A

proximal:
1st and 2nd - lateral two tendons of flexor digitorum profundus (as unipennate muscles)
3rd and 4th - medial three tendons of flexor digitorum profundus (as bipennate muscles)

distal: lateral sides of extensor expansions of 2nd -5th digits

innervation:
1st and 2nd - median nerve (C8, T1)
3rd and 4th - deep branch of ulnar nerve (C8, T1)

main action: flexes MCP joints, extend IP joints of 2nd-5th

lumbricals 3rd-4th innervation is the same as dorsal and palmar interossei innervation

25
Q

proximal, distal attachment, innervation and main action of dorsal interossei, 1st-4th

2-5 digit

A

proximal: adjacent 鄰近的 sides of two metacarpals (as bipennate muscles)
distal: bases of proximal phalanges, extensor expansions of 2nd-4th digits
innervation: deep branch of ulnar nerve (C8, T1)
main action: abdcuts 2nd-4th digits from axial line, acts with lumbricals in flexing MCP joints and extending IP joints

26
Q

proximal, distal attachment, innervation and main action of palmar interossei, 1st-3rd

2, 4, 5 digits

A

proximal: palmar surfaces of 2nd, 4th and 5th metacarpals (as unipennate muscles)
distal: base of proximal phalanges, extensor expansions of 2nd, 4th and 5th digits
innervation: deep branch of ulnar nerve (C8, T1)
main action: adduct 2nd, 4th and 5th digits toward axial line, assist lumbricals in flexing MCP joints and extending IP joints, extensor expansions of 2nd-4th digits

27
Q

4 layers of palm, from superficial to deep

A

thenar central hypothenar
layer 1 APB, FPB — APM, FDMB
layer 2 — lumbricals: tendons of FDS, FDP —
layer 3 opponens pollicis opp digiti minimi
layer 4 — palmar and dorsal interossei —

28
Q

ulnar artery in the wrist and hand

A
  • enters palm via Guyon’s canal
  • divides into superficial palmar arch and deep branch
29
Q

radial artery in the wrist and hand

A
  • deep branch of ulnar artery to form ther deep palmar arch
30
Q

median nerve in the wrist and hand

A
  • deep to flexor retinaculum
  • supplies thenar muscles via the recurrent branch
  • motor: lateral 2 lumbricals
  • sensory: palmar surface, sides and nail beds of lateral 3.5 digits
31
Q

ulnar nerve in the wrist and hand

A
  • terminates as superficial (sensory to palmar surface of medial 1.5 digits) and deep branch (motor to most intrinsics of the hand)
32
Q

dermatomes to the skin over the hand

A

refer back to lecture notes

1022 ANATOMY (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions