Lecture 5: Upper extremity (bones, ligaments, joints) Flashcards
What makes up the appendicular and axial skeleton?
Appendicular:
- SHOULDER GIRDLE (Pectoral Girdle)= Clavicles & Scapulae
- UPPER LIMB
- PELVIC GIRDLE (Innominate bones) = Ilium, Ischium, Pubis
- LOWER LIMB
Axial:
-skull
vertebral column
ribs
Name the bones that make up the shoulder girdle and upper limb
Scapula Clavicle Humerus Radius and ulna carpals metacarpals phalanges
What joint holds the entire shoulder girldle to the axial skeleton?
Sternoclavicular joint
Is the shoulder girdle
a) weak and unstable
b) strong and stable
a) weak and unstable
True or false, the shoulder girdle is not very mobile
false
Explain scapulothoracic rhythm
First 30 degrees of abduction is all done at the glenohumeral but after that, for the rest of the abduction there is a 2:1 ratio
For every 2 degrees of glenohumeral movement there is 1 degree of scapula movement
For total abduction, clavicle movement is 30 degrees
True or false: the clavicle is one fo the most fractured bones?
True, it drops when it is injured
Be able to identify the bone landmarks of the clavicle
Sternal (medial) end Acromial (lateral) end Conoid Tubercle Deltoid tubercle Trapezoid line subclavian groove
Pick the right answer
a) Going medially to laterally, the clavicle goes convex first then concave
b) GOing medially to laterally, the clavicle goes concave first
a) Going medially to laterally, the clavicle goes convex first then concave
How to tell orientation of the clavicle
Sternal side attached to chest medially, conoid tubcle faces against your body, concave goesout out first
IDENTIFY THE LANDMARKS OF THE CLAVICLE ON A PICCTURE
;
Where is the scapula located on the back>
Flat, triangular shaped bone • Posterior thoracic wall (T2-T7 ribs) Lateral border thicker – muscle attachments • Inferior angle (T7) • Glenoid fossa (head of humerus) • Coracoid process (ligament / muscle attachments) • Scapular spine • Medial – T3 • Lateral – Acromion process
Where does the inferior angle of the scapula line up?
T7
What are the 3 main depressions of the scapula and the muscles that attach
SUPRASPINOUS FOSSA > Supraspinatus m. • INFRASPINOUS FOSSA > Infraspinatus m.
SUBSCAPULAR FOSSA > Subscapularis m.
Name the bony landmarks on the scapula
Acromion process coracoid process scapular notch inferior,superior lately border spine inferior angle/superior angle suprinous fossa infraspinous fossa subscapular fossa glenoid cavity supraglenoid tubercle infraglenoid tubercle
True or false: The scapula articulates with the axial skeleton
FALSE
Label the landmarks of the scapula on the diagram
./
What type of joint is the sterno clavicular joint?
Synovial gliding joint
What is the purpse of the articular disk of the sternoclavicular joint?
Helps deepen the socket, helps clavicle from slipping
What are the ligaments of the sternoclavicular joint?
Anterior and posterior sternoclavicular ligaments
costoclavicular ligament (seen on first rib)
Interclavicular ligament (connective the calvicles Suprasternal notch)
Be able to identify the ligraments of the sternoclavicular joint
.
What type of joint is the acromioclavicular joint?
Synovial gliding joint
Does the AC joint have a lot of movement or minimal movement ?
Minimal movement
Does the AC joint contain a fibrocartilage disk?
SOMETIMES
