week 1 and 2 final revision

Ligaments

bands of fibrous tissue that stabilise joints bone to bone

Function of articular discs

• shock absorber

• aid mechanical fit

• restrain movement

• assist lube

• permit different movements to occur sim at joint

bursae

• synovial filled sacs that produce fluid

bursae function

• reduce friction, cushion structure

trochlea

medial

capitulum

lateral

medial epicondyle

larger and sticks out

anterior posterior abduction

160

transverse flexion

160 (f)

transverse axis extension

50

long axis rotation internal

90

long axis rotation external

80

glenoid labrum function

• mobility

• glenoid concavity

• provide attachment for jc, lig, m

glenoid labrum

fibrous structure around geloid fossa

Joint capsule

• thin lax

• attaches glenoid labarum and anatomical neck

• reinfoced RC and transverse humeral ligaments

• communicates with subscapular bursae and ITG

adduction

30

Coracohumeral

cap and extra

Coracohumeral function

Prevents lateral and inferior dislocation of humerus

Glenohumeral

capsular

3

Glenohumeral superior function

prevents lateral and inferior dislocation of humerus

Glenohumeral inferior function

Prevents anterior dislocation of humerus when fully flexed/abducted

Glenohumeral middle function

limits external rotation

Coracoacromial

extracapsular

Transverse humeral cap function

Keeps long head of biceps in bicipital groove

Coracoacromial

Prevents superior dislocation of humerus

Elevation and depression scap and clav

Lateral end clavicle elevates and depress

Movement at SC joint

protraction s - c

clavicle rotates and moves anteriorly at the SC joint

protraction s-c

clavicle downwards posteriorly

upward rotation s-c

glenoid fossa tips up, clavicle elevates and rotates posteriorly – allowing last 60 degree of overhead motion

downward rotation s-c

clavicle depresses and rotate back to neutral

function of clavicle

• brace

• transmit force

• protect nv structure

• attachment site

• maintain position of scapula

Sternoclavicular and acromioclavicular joint classify

synovial, multi, plane

sternoclavicular joint intra-articular disc function

improve congruency, shock absorber, superior dislocation of clavicle, acts as a pivot for elevation and depression

sternoclavicular synovial membrane

2 seperate

sternoclavicular ligaments

• costoclavicular

• sternoclavicular

sternoclavicular joint capsule

reinforced by capsular ligaments

acromioclavicular joint

Loose, reinforced by capsular ligaments, intra-articular disc – partial disc which functions as a shock absorber

acromioclavicular joint ligament

Acromioclavicular

Coracoclavicular

coracoacromial

Prevent superior dislocation of humerus

Costoclavicular

Prevent superior dislocation of clavicle

Limits protraction and retraction

Sternoclavicular

Anterior: limits retract

Posterior limits protraction

Coracoclavicular conoid

Produce posterior rotation, limit protraction, prevent superior dislocation of clavicle

Coracoclavicular trapezoid

Limit retraction/ superior and lateral dislocation of clavicle