Joints Flashcards
articular surfaces of the elbow joint
capitulum and trochlea of the humerus
- head of the radius (articulates with the capitulum of humerus)
trochlear notch of ulna (articulates with the trochlea of the humerus)
ligaments involved in the elbow joint:
the fibrous capsule is weak anteriorly and posteriorly but thickened laterally to form: -
- lateral (radial) collateral ligament
medial (ulnar) collateral ligament, which consists of 3 bands: anterior, posterior and oblique)
elbow joint - type?
synovial hinge
movements of the elbow joint
flexion/extension
articular surfaces of proximal radioulnar joint
- Head of radius
- Radial notch of the ulna
ligament involved in prox. radioulnar j
Anular ligament (continuation of fibrous capsule of the elbow joint)
proximal radioulnar joint - type
synovial pivot
proximal radioulnar joint - movements
pronation/supination
articular surfaces of sternoclavicular j
the sternal end of the clavicle and clavicular notch of the manubrium sterni and a small part of the costal cartilage of the first rib
ligaments involved in sternoclavicular j
- anterior and posterior sternoclavicular ligaments
- Interclavicular ligament
costoclavicular ligament
sternoclavicular j - type
synovial saddle - but functions as a ball and socket
acromioclavicular j articular surfaces
Found at acromial end of clavicle and at the acromion of the scapula
acromioclavicular j ligaments
superior acromioclavicular ligament
acromioclavicular j type
plane
acromioclavicular j action
gliding movement
what is the most weak part of glenohumeral j
inferior
articular surfaces of glenohumeral j
- Glenoid cavity on the scapula deepened by the glenoid labrium
Head of humerus
ligaments involved in glenohumeral j
- Intrinsic ligaments of the shoulder joint are formed as a thickening of the joint fibrous capsule and support the shoulder joint:
- coracohumeral ligament
- glenohumeral ligament anteriorly with three fibrous bends: superior, middle and inferior
- transverse humeral ligament which keeps long head of biceps muscle in the bicipital groove
Extrinsic ligament coracoacromial together with the smooth inferior surface of the acromion and coracoid process form the osseoligamentous arch that overlies the head of the humeru
type of joint - glenohumeral
ball + socket
movements of glenohumeral j
- Range of movements is great while stability of the joint is weak and compromised on account of mobility
- Abduction
- Adduction
- Flexion
- Extension
- Circumduction
- Medial rotation
Lateral rotation
distal radioulnar articular surfaces
head of ulna, ulnar notch of distal radius
distal radioulnar joint type
pivot
movemnet of distal radioulnar j
pronation/supination
articular surfaces of elbow j
captiulum and trochlea of humerus, head of radius, trochlear notch of ulna
ligaments involved in elbow j
lateral (radial) collateral lig, medial (ulnar) collateral
elbow j type
synovial hinge
elbow j movements
flexion/extension
prox radioulnar j articular surfaces
head of radius, radial notch of ulnar
ligament involved in prox radioulnar j
annular lig
prox. radioulnar j type
synovial pivot
prox. radioulnar j movements
pronation/supination
wrist j articular surfaces
- Distal radius articulates with the scaphoid and lunate carpal bones, while ulna does not contribute to the wrist joint and it has artiular disc separating it from the carpal bones
wrist j ligaments
igaments are thickening of the fibrous capsule:
- anterior – palmar radiocarpal ligament
- posterior – dorsal radiocarpal ligament
- ulnar and radial collateral ligaments
wrist j type
synovial condyloid
wrist j action
Flexion, extension, abduction, adduction and circumduction
intercarpal j type
synovial plane
intercarpal j action
Small amount of gliding movement
Involved in extension and abduction of the hand, facilitate movements at the radiocarpal joint
carpometacarpal j articular surfaces
Thumb: trapezium and base of the 1st metacarpal bone
Carpometacarpal j ligaments
Anterior and posterior carpometacarpal ligaments and interosseous ligaments
carpometacarpal j type
Synovial plane
Thumb: saddle synovial = wide range of movement
carpometacarpal j action
Gliding movements of the medial 4 metacarpal bones. Movements increase medially
