Brainscape's Knowledge GenomeTM

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


See full index

1022 ANATOMY > Week 10 Wrist and flexors (anterior compartment of the forearm) > Flashcards

Week 10 Wrist and flexors (anterior compartment of the forearm) Flashcards

1
Q

distal carpal bones from lateral to medial

A

tripezium: most irregular bone in the carpus, four sided, tubercle
tripezoid: wedge shaped
capitate: largest bone in the carpus
hamate: wedge shaped, hook of hamate

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

flexor retinaculum

laterally, medially

A

laterally: scaphoid tubercle, tubercle of trapezium
medially: pisiform, hook of hamate

Flexor retinaculum is a strong fibrous band which bridges the anterior concavity of the carpal bones thus converts it into a tunnel, the carpal tunnel.

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

joint classification of proximal row and distal row of carpal bones

A

synovial plane joint

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

bone and articular surfaces of proximal row and distal row of carpal bones (individual joints between)

A

scaphoid, lunate, triquetrum, pisiform
tripezium, tripezoid, capitate, hamate

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

ligaments and movements of proximal row and distal row of carpal bones

A

ligaments:
- interosseous intercarpal
–> proximal row: scapholunate ligament, lunotriquetral ligament
- palmar intercarpal
- dorsal intercarpal

movements:
minimal

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

joint classification of mid carpal joint

A
  • synovial plane joint
  • acts as functional unit
  • slightly convex (laterally), slightly concave (medially)
  • anatomically separate from the wrist (radiocarpal) joint
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

bones and articular surfaces, fibrous capsule of midcarpal joint

A

bones and articular surfaces:
proximally: scaphoid, lunate, triquetrum
distally: trapezium, trapezoid, capitate, hamate

fibrous capsule: continuous synovial lining

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

ligaments of midcarpal joint

A

palmar intercarpal
dorsal intercarpal
interosseous intercarpal
radial collateral
ulnar collateral

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

movements of midcarpal joint

A

flexion/ extension
abduction/ adduction (radial/ ulnar deviation)

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

proximal and distal attachment of pronator teres (PT)

ulnar and humeral head

A

proximal:
ulnar head: coronoid process
humeral head: medial epicondyle of humerus (common flexor origin)

distal:
middle of convexity of lateral surface of radius

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

innervation of PT

A

median nerve (C6, C7)

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

main action of PT

A

pronates and flexes forearm (at elbow)

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

proximal and distal attachment of flexor carpal radialis (FCR)

A

proximal:
medial epicondyle of humerus (common flexor origin)

distal:
base of 2nd metacarpal

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

innervation of FCR

A

median nerve (C6, C7)

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

main action of FCR

A

flexes and abducts hand (at wrist)

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

proximal and distal attachment of palmaris longus (PL)

A

proximal:
medial epicondyle of humerus (common flexor origin)

distal:
distal half of flexor retinaculum and apex of palmar aponeurosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

innervation of PL

A

median nerve (C7, C8)

18
Q

main action of PL

A

flexes hand (at wrist) and tenses 拉緊 palmar aponeurosis

19
Q

proximal and distal attachment of flexor carpi ulnaris (FCU)

A

proximal:
ulnar head: olecranon and posterior border of ulna (via aponeurosis)
humeral head: medial epicondyle of humerus (common flexors origin)

distal:
pisiform, hook of hamate, 5th metacarpal

20
Q

innervation of FCU

A

ulnar nerve (C7, C8)

21
Q

main action of FCU

A

flexes and adducts hand (at wrist)

22
Q

proximal and distal attachment of flexor digitorum superficialis (FDS)

A

proximal:
humero-ulnar head: medial epicondyle (common flexor origin and coronoid process)

radial head:
superior half of anterior border

distal: shafts of middle phalanges of medial 4 digits

23
Q

innervation of FDS

A

medial nerve (C7, C8, T1)

24
Q

main action of FDS

A
  • flexes middle phalanges at proximal IP joint of middle four digits
  • acting more strongly
  • flexes proximal phalanges at MCP joints
25
Q

proximal and distal attachment of flexor digitorum profundus (FDP)

A

proximal:
proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane

distal:
medial part: bases of distal phalanges of 4th and 5th digits
lateral part: bases of distal phalanges of 2nd and 3rd digits

26
Q

innervation of FDP

A

medial part: ulnar nerve (C8, T1)
lateral part: anterior interosseous nerve, from median nerve (C8, T1)

27
Q

main action of FDP

A

medial part: flexes distal phalanges 4 and 5 at distal IP joints
lateral part: flexes distal phalanges 2 and 3 at distal IP joints

28
Q

proximal and distal attachment of flexor pollicis longus (FPL)

A

proximal:
anterior surface of radius and adjacent interosseous membrane

distal:
base of distal phalanx of thumb

29
Q

innervation of FPL

A

anterior interosseous nerve, from median nerve (C8, T1)

30
Q

main action of FPL

A

flexes phalanges of 1st digit (thumb)

31
Q

proximal and distal attachment of pronator quadratus (PQ)

A

proximal:
distal 1/4 of anterior surface of ulna

distal:
distal 1/4 of anterior surface of radius

32
Q

innervation of PQ

A

anterior interosseous nerve, from median nerve (C8, T1)

33
Q

main action of PQ

A
  • pronates forearm
  • deep fibers bind radius and ulna together
34
Q

which muscles attach to medial epicondyle of humerus (common flexor origin)

A

PT (humeral head),
FCR
PL
FCU (humeral head)
FDS (humero-ulnar head)

35
Q

muscles in 1st-4th layer (from lateral to medial) (from superficial to deep)

A

1st layer: PT, FCR, PL, RCU
2nd layer: FDS
3rd layer: FPL, FDP
4th layer: PQ

36
Q

which muscles are in ulnar nerve in anterior compartment of forearm

A

FCU
FDP (medial part)

37
Q

courses and branches of the median nerve in the flexor compartment of the forearm

A
  • medial to brachial artery (cubital fossa)
  • leaves cubital fossa through pronator teres
  • passes deep to FDS
  • at wrist – becomes superficial
  • gives off anterior interosseous in distal part of cubital fossa
38
Q

courses and branches of ulnar nerve in the flexor compartment of the forearm

A
  • enters forearm through FCU
  • continues between FCU and FDP
  • runs on medial side of ulnar artery
  • at wrist – becomes superficial
  • enters the hand via Guyon’s canal (between pisiform and hook of hamate)
39
Q

course and extent of the radial and ulnar arteries, anterior interosseous artery

A

radial artery:
- over to pronator teres
- runs deep to brachioradialis
- superficial near the wrist
- passes through the anatomical snuffbox

ulnar artery
- deep to pronator teres
- deep to arch of FDS
- branches: common interosseous, recurrent and muscular

anterior interosseous artery
- from common interosseous artery

40
Q

borders, roof, floor, contents of carpal tunnel

A

borders: scaphoid, trapezium, hook of hamate, pisiform
roof: flexor retinaculum
floor: carpal bones, anterior ligament of wrist
contents:
- median nerve
- 9 tendons and their synovial sheaths:
tendon of FDS x4, FDP x4, FPL x1
- tendon of FCR (separate in the roof)

synovial sheaths: highly vascularized, easy to swelling

1022 ANATOMY (10 decks)

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