Unit 1: Lecture 15 Flashcards Preview

OT 716 - Unit I > Unit 1: Lecture 15 > Flashcards

Flashcards in Unit 1: Lecture 15 Deck (42):
1

The motions of pronation/supination are augmented by what motions AT the wrist?

- flexion/extension
- ulnar/radial deviation

2

Name the carpal bones

- Pisiform
- Triquetrum
- Hamate
- Capitate
- Scaphoid
- Trapezium
- Trapezoid
- Lunate

3

Which carpal bone is most often broken?

Scaphoid

4

Which carpal bone is most often dislocated?

Lunate

5

Where does the triangular fibrocartilage covering the distal radioulnar joint originate?

Styloid process of ulna

6

What type of joint is the radiocarpal?

Ellipsoidal

7

On either side of the hand (radial and ulnar), what are the two ligaments connecting to the carpals?

Ulnar and radial collateral ligaments

8

What type of joints are the intercarpals?

Plane/gliding

9

Which joint capsule encloses an articular disk?

Distal Radioulnar joint

10

What motion do the radio/ulnar collateral ligaments limit?

Radio/ulnar deviation

11

Joints of the of the proximal carpal row

Joints between scaphoid, lunate, triquetrum, and pisiform

12

Joints of the of the distal carpal row

Joints between capitate, hamate, trapezoid, and trapezium

13

Midcarpal joints

Joints between proximal and distal rows

14

What's to note about the pisiform?

- Forms the attachment of the flexor and extensor retinaculum on the ulnar side of the wrist
- The ulnar nerve passes between it and the hamate as it enters the palm, creating the Guyon's Canal

15

What is the second most broken carpal bone?

Triquetrum

16

What is the third most broken carpal bone?

Trapezium

17

What kind of joints are the carpometacarpals (2-5)?

Gliding/plane

18

What kind of joint is the carpometacarpal of the thumb?

Saddle

19

What kind of joints are the metacarpal joints (2-5)?

Condyloid

20

What kind of joint is the MCP of the thumb?

Hinge

21

Deep transverse metacarpal ligament

Thick ligamentous band interconnecting the 2nd - 5th MCP joints

Keeps them from "overspreading"

22

Palmar ligament (plate)

The palmar/volar portion of the joint capsule, thickened with fibrocartilage

23

Collateral ligaments

- encase MCP, PIP, and DIPs
- tight during flexion; loose in extension to allow for ABduction/ADduction

24

Palmar aponeurosis

Triangular expansion of the palmar fascia covering the carpal tunnel and extending to the MCP joints

25

Thenar/Hypothenar Muscle Sheathes

Covers thenar/hypothenar muscles

26

Flexor retinaculum

- covers carpal tunnels
- connects thenar and hypothenar eminences
- originates from trapezium and inserts on hook of hamate

27

Intrinsic muscles of the hand

- Thenar muscles
- Hypothenar muscles
- Middle compartment muscles

28

Hypothenar muscles

Originate at flexor retinaculum or pisiform bone, act of 5th digit, and innervated by deep branch of ulnar nerve
- Abductor Digiti Minimi
- Flexor Digiti Minimi
- Opponens Digiti Minimi

29

Thenar muscles

Originate at carpal bone, flexor retinaculum, or the metacarpal bones -- act on the thumb -- and most are innervated by recurrent branch of median nerve
- Abductor pollicis brevis
- Flexor pollicis brevis
- Opponens pollicis
- Adductor pollicis (deep branch of ULNAR n.)

30

Middle compartment muscles of hand

Originate between 2-5 metacarpals and act on the same digits
- Interossii muscles (4 dorsal, 4 palmar - all deep branch of ULNAR n.)
- Lateral 2 lumbricals (median n.)
- Medial 2 lumbricals (deep branch of ulnar n.)

31

Ulnar artery crosses wrist...

Ulnar artery travels with...

DEEP to palmar aponeurosis, but SUPERFICIAL to flexor retinaculum

Ulnar nerve

32

What is the primary blood supply to the hand?

Ulnar nerve

33

Princeps pollicis artery (thumb) and radialis indicis artery (index finger) arise from what artery?

Radial artery

34

From where does the recurrent radial artery first arise?

Superior margin of the supinator muscle

35

Canal of Frohse

The canal the deep radial nerve passes through before it enters forearm

36

What passes THROUGH carpal tunnel?

- Median nerve
- Flexor Digitorum superficialis tendons (all 4)
- Flexor Digitorum profundus tendons (all 4)
- Flexor Pollicuc Longus tendon

37

Extensor Retinaculum: Compartment 1 structures

Abductor pollicis longus
Extensor pollicis brevis

38

Extensor Retinaculum: Compartment 2 structures

Extensor carpi radialis brevis
Extensor carpi radialis longus

39

Extensor Retinaculum: Compartment 3 structures

Extensor pollicis longus

40

Extensor Retinaculum: Compartment 4 structures

Extensor digitorum (pre-split)
Extensor indicis

41

Extensor Retinaculum: Compartment 5 structures

Extensor digiti minimi

42

Extensor Retinaculum: Compartment 6 structures

Extensor carpi ulnaris