Brainscape's Knowledge GenomeTM

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


See full index

2.3 T2: Musculoskeletal system > T2 L6: Anatomy of the hand > Flashcards

T2 L6: Anatomy of the hand Flashcards

1
Q

What are the 3 types of bone in the hand?

A

The carpals, metacarpals, and phalanges bones

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

What are the 8 carpel bones?

A 
Scaphoid 
Lunate 
Triquetral 
Pisiform 
Trapezium
Trapezoid
Capitate
Hamate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are some complications of a scaphoid fracture?

A

There is poor radial blood supply to the proximal part of the bone so there will be avascular necrosis id the injury is not fixed

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

What are the 6 joints in the hand?

A
  • Saddle joint at the thumb
  • Radiocarpal joint at the wrist
  • Midcarpal/ intercarpal
  • Carpometacarpal
  • Metacarpophalangeal
  • Interphalangeal
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which ligaments reinforce the radiocarpal joint?

A

Ulnar and radial collateral ligaments limit abduction/adduction

Ligaments on the palmar/dorsal surface limit extension/flexion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What types of joints are carpometacarpal joints?

A

plane joints apart from the saddle joint between trapezius and metacarpal d1

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

What types of joints are metacarpophalangeal joints?

A

Condyloid joints

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the deep transverse metacarpal ligaments?

A

They unify the metacarpals but not between d1 and d2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What types of joints are interphalangeal joints?

A

Hinge joints

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

What is the clinical significance of the palmar aponeurosis?

A

It’s composed from longitudinal and transverse fibres and is continuous with palmaris longus

It’s where Dupuytren’s contracture occurs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

In which digits is flexor digitorum and profundus found?

A

D2-D5 (all except thumb)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How do flexor digitorum profundus and superficialis interact?

A

They pass through eachother at the proximal interphalangeal joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are vinculae?

A

Bands of connective tissue that attach tendons to phalangeal bones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are fibrous annular and cruciate ligaments?

A

They attach the finger tendons to the phalangeal bones

Annular are simple rounded, cruciate cross over the phalangeal joints

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

What are the names of the long extensor tendons to the digits?

A

D1

  • Extensor pollicis longus
  • Extensor pollicis brevis
  • Abductor pollicis longus

D2-D5

  • Extensor digitorum
  • Extensor indicis
  • Extensor digit minimi

They extend from muscles in the posterior forearm

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

What muscles attach to the extensor hood of fingers?

A

Intrinsic muscles of the hand (the lumbricals and the interossei)

17
Q

What is the clinical significance of the anatomical snuff box?

A

To palpate the scaphoid bone and the radial pulse

18
Q

What are the boundaries of the anatomical snuff box?

A

Extensor pollicis brevis and extensor pollicis longus

19
Q

What is the function of the lumbricals?

A

They extend the interphalangeal joints and flex metacarpophalangeal joints

They’re for precision grip Eg. pinching

20
Q

Which digits have bifennate lumbricals?

A

d3,d4, and d5 (ring and pinky finger)

21
Q

What is the function of palmar interossi?

A

They adduct metacarpalphalangeal joints (bring finger together)

There are none on d1 and d3 because they don’t adduct (all fingers move away from d3)

22
Q

How many palmar interossei muscles are there?

A

3

23
Q

How many lumbricals are there?

A

4 (2 are bifennate)

24
Q

What is the function of dorsal interossei?

A

They abduct at the metacarpalphalangeal joint (bring fingers apart)

25
Q

How many dorsal interossei muscles are there?

A

4 (d2, d3 x2, and d4)

26
Q

Why are there no interossei muscles on d1 and d5?

A

Abduction is performed by thenar and hypothenar muscles instead

27
Q

What is the origin of thenar and hypothenar bones?

A

Flexor retinaculum and adjacent carpal bones

28
Q

Which muscles make up the thenar group?

A

Opponens pollicis (deepest)
Abductor pollicis brevis
Flexor pollicis brevis

29
Q

Which muscles make up the hypothenar group?

A

Opponens digiti minimi (deepest)
Abductor digiti minimi
Flexor digiti minimi

30
Q

What are the intrinsic muscles of the hand?

A 
Thenar
Hypothenar
Lumbricles
Interossei
Adductor pollicis
31
Q

Which muscles performs adduction of the thumb?

A

Adductor pollicis

It has an oblique head based on 2nd and 3rd metacarpal and carpal bones and it has a transverse head attaches to the 3rd metacarpal

It attaches to the proximal phalanx

32
Q

Which artery supplies d1 and 1/2 d2?

A

Radial artery

33
Q

Which artery forms the deep palmar arch?

A

Radial artery

34
Q

Which artery forms the superficial palmar arch?

A

Ulnar artery

35
Q

Which artery supplies 1/2 d4 - d5?

A

Ulnar artery

36
Q

Which nerve passes through the carpal tunnel?

A

The median nerve

37
Q

What causes a clawed hand?

A

Damage to the ulnar nerve at the wrist

2.3 T2: Musculoskeletal system (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions