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Anatomy 2 > 5) Hand joints > Flashcards

5) Hand joints Flashcards

1
Q

Metacarpals

A

5 longer bones in the hand

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

Distal: Rounded head = articulate base proximal phalanx= metacarpalphalangeal

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2
Q

Carpometacarpal joint

Classification

A

Plane, simple, synoivial, multiaxail

Between carpal and metacarpal bones

Bases of medial 4 metacarpals + medial 3 distal carpal bones

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3
Q

Carpometacarpal joint

Articular surface

A

see file

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4
Q

Carpometacarpal

joint capsule

A

see file

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5
Q

Carpometacarpal

synovial membrane

A

Lines capsule and non articulating margins, attaching to articular margins

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6
Q

Carpometacarpal

ligaments

A

Dorsal Carpometacarpal ligament
Palmar Carpometacarpal ligament
Interosseous ligament

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7
Q

Dorsal Carpometacarpal ligament

A

Fibrous bands

Distal row of carpals - Bases of metacarpals

Each metacarpal: x2 bands

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8
Q

Palmar Carpometacarpal ligament

A

Similar to Dorsal ligament

base of third metacarpal receives 3 bands

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9
Q

Interosseous ligamnet

A

short

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

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10
Q

Stability Carpometacarpal Joint

A

very stable providing firm base between joints of wrist and hand

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11
Q

Movement Carpometacarpal joint

A

slight gliding movement

Flexion and rotation of 5th metacarpal

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12
Q

Intermetacarpals

A

Plane,simple,synovial, multiaxail

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

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13
Q

Metacarpalphalangeal joint

A

Condaloyid, simple , synovial, biaxail

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14
Q

Metacarpalphalangeal

Joint capsule

A

see file

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15
Q

Metacarpalphalangeal

Articulaing surface

A

see file

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16
Q

Metacarpalphalangeal

synovial membrane

A

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

17
Q

Metacarpalphalangeal

Ligaments

A

Collateral ligament
Palmar ligament
Deep transverse metacarpal ligament

18
Q

Metacarpalphalangeal

Collateral Ligament

A

Strong fan out limit ab and adduction

Passes from:

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

19
Q

Palmar Ligament

A

Dese fibrocartilagionus plate limits extension

firmly attached anterior margin base of proximal phalanx

Acts as amobile articular surface for flexion

20
Q

Deep transverse metacarpal ligament

A

Series of short bands connecting palmar ligaments metacarpalphalangeal joints.

Bind 4 medial metacarpals together

Continuous with palmar interosseous fascia fascia blends with flexor sheaths

21
Q

Metacarpalphalangeal

Stability

A

Long flexor and extensor tendons

Lumbricals and interossei

22
Q

Metacarpalphalangeal

movements

A 
Flexion 
Extension
Abduction
Adduction
Passive rotaton
pinky= active rotation
23
Q

Interphalangeal Joints

Proximal
Distal

A

Hinge,simple,synovial,uniaxail

Proximal= head of proximal phalanx + base middle phalanx

Distal= head of middle phalanx+ base of distal phalanx

24
Q

Interphalangeal

Articulating surface
Joint capsule

A

see file

25
Q

Interphalangeal

synovial membrane

A

Lines all non articulating margins including ant+post recesses

26
Q

Interphalangeal

Ligaments

A

Collateral ligaments

Palmar ligament

27
Q

Collateral ligamnet

Interphalangeal

A

Attatches
sides of the head of most proximal phalanx—–sides of bases of more distal phalanx

tense in flexion

28
Q

Palmar ligament

Interphalangeal

A

Mobile fibrocartilaginous plate

Attatched: anterior margin of base of adjacent phalanx

29
Q

Interphalangeal

Stability

A

Fairly stable

30
Q

Interphalangeal

Movement

A

Flexion

Extension

31
Q

What’s in the carpal tunnel

A

Median nerve

Tendons of flexor digitorum superficialis and profundus

Flexor pollicus longus and flexor carpi radialus

32
Q

Fibrous extensor sheaths of the hand

A

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

Anatomy 2 (12 decks)

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