RT 103 Ch. 4, CA Flashcards Preview

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Flashcards in RT 103 Ch. 4, CA Deck (46):
1

Name the main groups that anatomists divide the bones of the upper limbs or extremities into.

Hand
Forearm
Arm
Shoulder girdle

2

How many bones are in the hand?

27

3

Name the 3 groups that make up the 26 hand bones.

Phalanges - bones of digits (fingers and thumb)
Metacarpals - bones of the palm
Carpals - bones of the wrist

4

How many phalanges are in the digits?

14

5

Phalanges

long bones that consist of a cylindric body and articular ends.

6

How many phalanges in the first digit and name them?

2
proximal and distal

7

How many phalanges in the rest of the digits and name them?

2
proxima, middlel and distal

8

Metacarpals

Bones of the palm

9

How many metacarpal bones in the hand

5

10

Metacarpals

cylindric in shape and slightly concave anteriorly, form the palm of the hand.

11

What are metacarpal heads commonly referred to?

knuckles

12

What does the first metacarpals contain?

Two small sesamoid bones on its palmar aspect below the neck.

13

Proximal Row of the carpal bones


Scaphoid Navicular
Lunate Semilunar
Triquetrum Triquetral, cuneiform, or triangular
Pisiform (none)

14

Distal Row of the carpal bones


Trapezium Greater Multiangular
Trapezoid Lesser Multiangular
Capitate Os magnum
Hamate Unciform

15

How many carpal bones does the wrist have?

8

16

what is the largest bone in the proximal carapal row?

scaphoid

17

Lunate

articulates with the radius proximally and is easy to recognize because of its crescent shape.

18

Triquetram

roughly pyramidal and articulates anteriorly with the hamate

19

Pisoform

a pea-shaped bone situated anterior to the triquetrum and is easily palpated.

20

Trapezium

has a tubercle and groove on the anterior surface

21

Trapezoid

has a smaller surface anteriorly than posteriorly.

22

Capitate

articulates with the base of the third metacarpal and is the largest and most centrally located carpal.

23

Hamate

exhibits the prominent hook of hamate, which is located on the anterior surface.

24

Which two carpals form the medial margin of of the carpal groove?

Hamate & Pisiform

25

Anatomic Snuffbox

a depression formed by the tendons of the two major muscles of the thumb.

26

What does the radial artery do?

Carries blood to the dorsum of the hand.

27

What is the most commonly fractured carpal bone?

scaphoid

28

What is a clinical sign of a scaphoid fracrure?

tenderness in the snuffbox area.

29

Carpal Sulcus

formed by the anterior and palmar surface of the wrist and is concave from side to side.

30

Flexor retinaculum

a strong fibrous band, attached medislly to the pisiform and hook of hamate and laterally to the tubercles of the scaphod and Trapezium

31

Carpal tunnel

passageway created between the carpal sulcus and Flexor retinaculum

32

what do the medium nerve and the flexor tendons have in common?

they pass through the carpal tunnel.

33

What does carpal syndrome

results from compression of the medium nerve inside the carpal tunnel

34

Forearm

contains two bones that lie parallel to each other , the radius and the ulna.

35

What side of the forearm is the radius located on?

lateral

36

What side of the forearm is the ulna located on?

medial

37

Describe the body of the ulna

is long and slender and tapers inferiorly.

38

Proximal process or olecranon process

concaves anteriorly and slightly inferiorly and forms the proximal portion of the of the trochlear notch

39

coronoid process (more distal process)

projects anteriorly from the anterior surface of the body and curves slightly superiorly.

40

Radial notch

located on the lateral aspect of the coronoid process

41

head

distal end of the ulna and includes a rounded process on the lateral side.

42

ulnar styloid process

narrower conic projection on the posteromedial side

43

What separates the head and ulna from the wrist joint?

articular disk

44

Proximal end of the radius

small and presents a flat disklike head above a constricted area called the neck.

45

Radial tuberosity

roughed process just inferior to the neck on the medial side of the body of the radius.

46

Radial styloid process

distal end of the radius , broad and flattened and has a conic projection on the lateral surface.