Chapter 8 - Appendicular Skeleton Flashcards Preview

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1

Appendicular Skeleton

The primary function is ?

movement

2

Appendicular Skeleton includes?

 bones of the upper and lower limbs

girdles attach the limbs to the axial skeleton  

3

Each upper limb has __ bones

30

4

(2) seperate regions of upper limb

1) pectoral (shoulder) girdle (2 bones)

2) free part (30 bones)

5

Pectoral (shoulder) Girdle consists of 2 bones

1) scapula

2) clavicle

6

(30) bones of the the part of the upper limbs

1 humerus (arm)

1 radius (forearm)

 1 ulna (forearm) 

8 carpals (wrist)

 19 ( 5 metacarpals & 14 phalanges)  (hand)

7

Clavicle 

 

ends & joints

S shaped 

medial end  articulates with manubrium of sternum forming sternoclavicular joint

lateral end articulates with acromion forming acromioclavicular joint

8

The clavicle is :

______________in shape anteriorly near the sternal junction

 ______________anteriorly on its lateral edge near the acromion 

convex 

concave

9

Scapula (shoulder blade)

shape 

most notable features 

triangular 

spine, acromion, coracoid process & glenoid cavity

10

Scapula

- spine 

 a large process on the posterior of the scapula that ends laterally as the acromion 

11

acromion of scapula

  the flattened lateral portion of the spine of the scapula 

 

12

coracoid process of scapula

 a protruding projection on the anterior surface just inferior to the lateral aspect of the clavicle 

 

13

Glenoid Cavity of scapula

shallow concavity that articulates with the head of the humeru

 

14

Medial (vertebral) border of scapula

closest to the vertebral spine 

15

Superior border of scapula

superior edge

16

Lateral (axillary) border of scapula

closest to arm

17

Inferior angle of scapula

 where medial and lateral borders meet inferiorly 

18

Superior angle of scapulaa

 uppermost aspect of scapula where medial border meets superior border 

19

Subscapular fossa of scapula

anterior concavity where the subscapularis muscle attaches 

20

Supraspinous fossa of scapula

 posterior concavity superior to the scapular spine, attachment site for supraspinatus muscle 

21

Infraspinous fossa of scapula

- posterior concavity inferior to the scapular spine, site of infraspinatus muscle 

22

Humerus

- longest & largest bone of free part of upper limb

 

23

Humerus - articulation with shoulder blade

 proximal ball-shaped end of humerus articulates with glenoid cavity of the scapula (glenohumeral joint) 

24

Humerus - articulations

proximal ball end with glenoid cavity of scapula

distal end at elbow with radius & ulna

 

25

The head of the humerus has (2) unequal-sized projections

greater tubercle - lies more laterally

lesser tubercle - lies more anteriorly 

26

Between the tubercles lies the ______________ where the long head of the biceps brachii tendon is located 

intertubercular groove or sulcus (bicipital groove)

27

 Just distal to the head is the ___ ___ which is where the __ ___ begins and is a common area for fracture

surgical neck

tubular shaft

28

 About mid-shaft on the lateral aspect is a roughened area, the ___ ___ where the deltoid tendon attaches 

deltoid tuberosity 

29

 a round knob-like process on the lateral distal humerus 

 

capitulum

30

- medial to the capitulum, is a spool-shaped projection on the distal humerus 

trochlea