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Week 1 to week 7 human locomotor > Wrist > Flashcards

Wrist Flashcards

1
Q

Two main articulations of wrist joints?

A
  1. Inferior radioulnar joint
  2. Wrist joint/radiocarpal joint
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2
Q

The synovial ellipsoid joint of the wrist involves the

A

Distal end of radius and articular disc of distal end of ulna

with

Scaphoid, lunate and triquetrum

  • Triquetrum rub with articular disc (not facet of articulation for it on the dicsc)
  • Ulna do not participate in wrist joint
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3
Q

What movement do the wrist joint do?

A

flex, extend, add, abduct, circumduction

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4
Q

What is radio deviation?

A

abduction

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5
Q

What is ulna deviation?

A

Adduction

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6
Q

What does the triangular fibrocartilage complex do?

A

stabilise ulnar part of wrist joint, weight bearing, shock absorb

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7
Q

Three ligaments of the wrist joint?

A
  1. Palmar radiocarpal and ulnocarpal lig
  2. Dorsal radiocarpal lig
  • these two reinforce abduct, adduct, smooth glide
  1. Radial and ulnar collateral lig
  • abduct, adduct
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8
Q

what makes up TFCC

A

ulnar collateral lig
palmar ulnocarpal lig
articular disc

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9
Q

Superficial layer of muscles on anterior forearm?

A

flexor carpi ulnaris
Flexor carpi radialis
Pronator teres
palmaris longus

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10
Q

Intermediate layer of anterior forearm muscles

A

flexor digitorum superficialis

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11
Q

deep layer of muscles on anterior forearm?

A

flexor digitorum profundus
pronator quadratus
flexor pollicis

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12
Q

Superficial muscle of forearm common origin?

A

Medial epicondyle of humerus

Pronator teres humeral head attach

ulnar head attach to ulna

Looks like a clip, with median nerve going through it

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13
Q

In superficial arm flexors are typically located where and extensors are typically where

A

medial and lateral respectively

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14
Q

Which two muscles do not get innverated by median nerve of the forearm, and instead it is the ulnar nerve?

A

flexor carpi ulnaris (superficial, most lateral of forearm)

medial (ulnar) half of flexor digitorum profundus

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15
Q

superficial anterior forearm muscle from medial to lateral

A

pronator teres, flexor carpi radialis, palmar longus and flexor carpi ulnaris

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16
Q

Deep uscle from medial to lateral

A

flexor pollicis longus, flexor digitorum profundus, pronator quadratus

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17
Q

What is the carpal tunnel formed by?

A

Flexor retinaculum (transverse carpal lig) stretched on top of carpal bones (form a bowl at the floor)

allow tendon glide under so not sticking out during flexing

tight area = inflammation prone

median nerve

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18
Q

Posterior forearm superficial muscles

A

Brachioradialis (flexor of elbow)

Extensor carpi radialis and ulnaris

anconeous

extensor digitorum

extensor digiti minimi

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19
Q

Posterior forearm deep muscles

A

Supinator

extensor indices

extensor pollicis longus and brevis

Abductor pollicis longus

20
Q

Superficial extensors typically attach

A

lateral epicondyle of humerus

21
Q

Adduction of wrist is by…

A

extensor carpi radialis longus and brevis while

flexor carpi radialis CONTRACTS (flexor)

22
Q

Flexion at the wrist is by…

A

flexor carpi radialis and ulnaris

23
Q

extension of wrist

A

extensor carpi radialis longus, brevis and extensor carpi ulnaris

24
Q

Adduction of the wrist

A

extensor carpi ulnaris with flexor carpi ulnaris CONTRACT

25
joints in the hand
metacarpophalangeal (MCP joints) carpal joints carpometacarpal joints
26
What kind of joint is metacarpophalangeal joint
condyloid biaxial F/E, abd/add
27
what kind of joints is carpometacarpal?
1st one (thumb) saddle: - F/E/ abd/add 2-5 is plane
28
carpal joint actions?
glide, F/E easier, assist wrist
29
Metacarpophalangeal joints (MCPs) is reinforced by what ligaments?
palmar ligament medial and lateral collateral lig (either side of palmar ligament) 3 deep transverse metacarpal ligament - restrict movement of metacarpals - none on thumb for motility
30
Joints on phalanges?
4 fingers: Distal and proximal interphalangeal joints thumb: interphalangeal joint HINGE SYNOVIAL JOINT FLEX AND EXTEND
31
Scaphoid bone
most radial easily fractured (middle skinny) hard to image clearly
32
The scaphoid and the radial artery
artery supplied distal to proximal (scaphoid first, then up)
33
Lunate
easily dislocated Looks like crescent moon
34
Capitate
rarely damaged
35
trapezium
closest to thumb proximal surface MOST DEGENERATIVE JOINT (1st CMC) in the body - saddle shape in distal facet (for thumb) - most mobile part of hand
36
The anatomical snuff box
triangular depression at back of hand: Lateral border: abductor pollicis longus and extensor pollicis brevis tendon Medial border: Extensor pollicis longus tendon The floor: scaphoid and trapezium roof: skin
37
Contents of anatomical snuff box?
Radial artery superifcial branch fo radial nerve cephalic vein if it feels tender: scaphoid fracture
38
Power grip involves
forearm flexors act on interphalangeal joints intrinsic hand muscles act on metacarpophanlangeal joints forearm extensors on wrist
39
Hook grip (carry back) involve:
forearm flexors
40
precision grip involves
wrist and digits held firm by forearm muscles intrinsic muscles perform fine movement
41
Two tendons for the extrinsic flexor distal attchments?
1. flexor digitorum profundus tendon to distal phalan 2. Flexor digitorum superficialis tendon to middle phalan superficilis SPLIT at proximal interphalangealjoint (PIP) to allow profundus to go through
42
The vinculum?
anchor the flexor digitorum tendon profundus and superficialis provide blood
43
adductor pollicis
from metacarpals II, III and capitate Insert in proximal phalanx of thumb have transverse (top) head and oblique head below It moves the thumb, but no the thenar muscle
44
Lumbricals
4 muscles Originate from tendons of flexor digitorum profundus come lateral and attach on extensor hood Link flexor tendons with extensors
45
Interossei function
adduct: 3 (no middle and thumb) - Palmar interossei Abduct: 4 (no thumb) Dorsal interossei PAD and DAB
46
Extensor hood
attachment sight for lumbricals and interossei
47
Action of lumbricals and interossei
Flex MCP while extending interphalangeal joints

Week 1 to week 7 human locomotor (12 decks)

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