5) Hand joints

Question 1

Metacarpals

Answer 1

5 longer bones in the hand

Proximal: Quadrilateral base= articulate distal row carpal bones= carpometacarpal joints

Distal: Rounded head = articulate base proximal phalanx= metacarpalphalangeal

Question 2

Carpometacarpal joint

Classification

Answer 2

Plane, simple, synoivial, multiaxail

Between carpal and metacarpal bones

Bases of medial 4 metacarpals + medial 3 distal carpal bones

Question 3

Carpometacarpal joint

Articular surface

Answer 3

see file

Question 4

Carpometacarpal

joint capsule

Answer 4

see file

Question 5

Carpometacarpal

synovial membrane

Answer 5

Lines capsule and non articulating margins, attaching to articular margins

Question 6

Carpometacarpal

ligaments

Answer 6

Dorsal Carpometacarpal ligament
Palmar Carpometacarpal ligament
Interosseous ligament

Question 7

Dorsal Carpometacarpal ligament

Answer 7

Fibrous bands

Distal row of carpals - Bases of metacarpals

Each metacarpal: x2 bands

Question 8

Palmar Carpometacarpal ligament

Answer 8

Similar to Dorsal ligament

base of third metacarpal receives 3 bands

Question 9

Interosseous ligamnet

Answer 9

short

inferior angles of capitate and hamate- base of 3rd/4th metacarpal

Question 10

Stability Carpometacarpal Joint

Answer 10

very stable providing firm base between joints of wrist and hand

Question 11

Movement Carpometacarpal joint

Answer 11

slight gliding movement

Flexion and rotation of 5th metacarpal

Question 12

Intermetacarpals

Answer 12

Plane,simple,synovial, multiaxail

between adjacent sides of bases of:
2nd+3rd
3rd+4th
4th+5th metacarpals

Question 13

Metacarpalphalangeal joint

Answer 13

Condaloyid, simple , synovial, biaxail

Question 14

Metacarpalphalangeal

Joint capsule

Answer 14

see file

Question 15

Metacarpalphalangeal

Articulaing surface

Answer 15

see file

Question 16

Metacarpalphalangeal

synovial membrane

Answer 16

Lines non-articular surfaces. Anterior+posterior recesses of capsule allow freedom of movement (flexion)

Question 17

Metacarpalphalangeal

Ligaments

Answer 17

Collateral ligament
Palmar ligament
Deep transverse metacarpal ligament

Question 18

Metacarpalphalangeal

Collateral Ligament

Answer 18

Strong fan out limit ab and adduction

Passes from:

tubercle on side of metacarpal head —– palmar aspect side of base of proximal phalanx

Question 19

Palmar Ligament

Answer 19

Dese fibrocartilagionus plate limits extension

firmly attached anterior margin base of proximal phalanx

Acts as amobile articular surface for flexion

Question 20

Deep transverse metacarpal ligament

Answer 20

Series of short bands connecting palmar ligaments metacarpalphalangeal joints.

Bind 4 medial metacarpals together

Continuous with palmar interosseous fascia fascia blends with flexor sheaths

Question 21

Metacarpalphalangeal

Stability

Answer 21

Long flexor and extensor tendons

Lumbricals and interossei

Question 22

Metacarpalphalangeal

movements

Answer 22

Flexion 
Extension
Abduction
Adduction
Passive rotaton
pinky= active rotation

Question 23

Interphalangeal Joints

Proximal
Distal

Answer 23

Hinge,simple,synovial,uniaxail

Proximal= head of proximal phalanx + base middle phalanx

Distal= head of middle phalanx+ base of distal phalanx

Question 24

Interphalangeal

Articulating surface
Joint capsule

Answer 24

see file

Question 25

Interphalangeal synovial membrane

Answer 25

Lines all non articulating margins including ant+post recesses

Question 26

Interphalangeal Ligaments

Answer 26

Collateral ligaments | Palmar ligament

Question 27

Collateral ligamnet Interphalangeal

Answer 27

Attatches sides of the head of most proximal phalanx-----sides of bases of more distal phalanx tense in flexion

Question 28

Palmar ligament Interphalangeal

Answer 28

Mobile fibrocartilaginous plate Attatched: anterior margin of base of adjacent phalanx

Question 29

Interphalangeal Stability

Answer 29

Fairly stable

Question 30

Interphalangeal Movement

Answer 30

Flexion | Extension

Question 31

What’s in the carpal tunnel

Answer 31

Median nerve Tendons of flexor digitorum superficialis and profundus Flexor pollicus longus and flexor carpi radialus

Question 32

Fibrous extensor sheaths of the hand

Answer 32

Tendon sheath = double walled sheath Encloses tendon 2 layers Visceral layer= encloses tendon Parietal layer = outer layer lines surrounding tissue Cavity between layers contains thin film of synovial fluid > protects tendon > friction free movement= through fibroessous tunnels, pass under ligaments and retinaculum