Distal ulna and radius Flashcards

1
Q

Distal ulna

A

Bone tapers from top (smaller at base)
Head at distal site
Ulnar styloid process

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2
Q

Ulna styloid process function

A

Collateral wrist ligaments attach

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3
Q

Distal radius

A

Bone larger at distal end

Ariculates with carpals

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4
Q

Lateral radius

A

Styloid process - collateral ligaments attach

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5
Q

Medial radius

A

Ulna notch for ulna head to articulate

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6
Q

Posterior distal radius

A

Dorsal tubercle - allow extensor pollucis longus to change directions of pull

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7
Q

Carpal bone organisation

A

2 rows of 4
Proximal - articulate with radius
Distal - articulate with metacarpals

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8
Q

metacarpal parts

A

head
body
base

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9
Q

hand bones

A

carpals (base)
metacarpals
phalanges (3 per finger apart from thumb)

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10
Q

Joints of the hand

A
metacarphalangeal 
interphalangeal (distal and proximal)
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11
Q

Proximal carpal bones

A

Scaphoid
Lunate
Triquetrum
Pisiform

Straight line to pinky

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12
Q

Distal carpal bones

A

Hamate
Capitate
Trapezoid
Trapezium

Here comes the thumb

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13
Q

carpal tunnel borders

A

roof: flexor retinaculum
Lateral: scaphoid and trapezium
Medial: Hamate and pisiform

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14
Q

Contents of carpal tunnel

A
flexor tendons - 
flexor digitorum superficialis and profundus (superficialis on top)
flexor pollucis longus 
Median nerve (most superficial)

(NOT ULNAR NERVE)

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15
Q

Rhyme for carpals

A
Triquetral = proxiMAL
Trapezium = under the thumb
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16
Q

How does ulnar nerve enter the hand?

A

Guyons canal

17
Q

Distal radioulnar joint

A

Triangular ligament unites (fibrocartilagenous)
Ulna notch on radius and ulna head
Radius takes hand with it

18
Q

Function of triangle ligament

A

Separates radioulnar joint from wrist joint

Loose around superior to allow radius to move around

19
Q

Where is guyons canal?

A
Near pisiform (ulnar border)
hook of hamate (radial border)