lec 10 Flashcards
what are the 4 joints in order from most medial to lateral
sternoclavicular
scapulocostal/ scapulothoracic
acromioclavicular
shoudler/ glenohumeral joint
which joint is not. true joint (no true articulation, no capule/cavity, no ligaments, no synovial fluid)
scapulothoracic joint
scapulothoracic joint
-not. true joint
-scapula and thoracic cage
-movment via scapula
-creates movement at acromioclavicular and sternoclaviucvlar joints
-movable base for humerus
-increase ROM at shoulder joint
-helps deltoid above 90 degrees
-glenohumeral stability for overhead
-absorb shock of outstretched arm
movements of scapulothoracic
all movements
protract
retract
elevate
depress
rotate
–>upward: glenoid cavity tips up, inferior angle rotates out
–>downward: glenoid cavity tips down, inferior angle inward
sternocalvicular joint
what ligaments
facet on medial end of clavicle (sternal facet) and facet on manubrium of sternum
- sternoclavicular ligament with capsule
- interclavicular ligament
- costoclavicular ligmante
elevate, depress clavicle (greater ROM at elevate bc breath)
protract, retract
rotate clavicle
*** scapular protraction causes clavicle to retract and vice versa
acromioclaviulcar joint
what ligament s
facet on lateral end of clavicle (acromial facet) and facet on medial end of acromion
planar synovial -slide and glide
1.acromioclavicular ligament
2. trapezoid ligament
3. conoid ligament
2+3= coracoclavicular ligament –> both from scap to clavicle; anchors lateral clavicle
–> so no superior dislocation
glenohumeral/ shoulder joint
glenoid fossa of scap and head of humerus
-covered by hyaline cartilage
ball and socket - 3 DOF (flex, ex, abd/add, rotate, circumduct
-humerus is way bigger than glenoid cavity
–> glenoid labrum to make glenoid cavity deeper (soup bowl)
-capsule attached it to humerus
capsular ligaments: superior, middle, inferior
transverse humeral ligament (on upper part of bicipital groove of humerus –> functions as retinaculum for biceps long head
coracohumeral ligament ; intrinsic, onto of capsule ligament
coracoacromial ligament; bridges gap between coracoid and cronmion of scap; coracoacromial arch. overlies humerus; prevent superior displacement
sub scapular bursa
–>subacromial bursa; btwn acronomiom and tendon of supraspinatous to allow movement
–> sub deltoid bursa
-decrease friction and tension
different types of joints
scapulothoracic- no true
sternoclavicular- saddle
acromioclavicular- planar
glenohumeral/ shoulder joint- ball and socket
which ligament holds bicep tendon in place and what joint is it a part of
glenohumeral/shoudler joiint
transverse humeral ligament
elbow complex
what type of joint is it
what ligament
humero-ulnar joint (trochlea of humerus articulates with trochlear notch of ulna)
humero-radial joint (capitulum of humerus articulate with head of radius)
proximal radio-ulnar joint
hinge; flexion and extension
axis is distal to epicondyles
medial (ulnar) collateral ligament
lateral (radial) collateral ligament
anterior ligament
oblique anterior ligament
carrying angle
2 deformities in angle
trochlea of humerus extends more distill than capitulum
–> trochlea articulate with ulna
–> capitulum articulates with radius
-in full extension the forearm deviated laterally 5-19 degrees (more in women bc hips)
cubitus varus; less carrying angles, forearm deviates towards midline
cubitus valgus; more carrying angle, elbow turned in, forearm out more
elbow flexion and extension
145 active flex, 160 passive flex, 0 degree extend; anatomical position
proximal (superior) radio-ulnar joint
synovial pivot (rotate about the axis –> pronate and supinate)
-head of radius, fibre-ossesou ring
-radial notch of ulna
-annular ligament
(big ulna in radius little circle)
inferior (distal) radio-ulnar joint
pivot (rotate)
-ulnar notch, articular disc
-thickening of capsule as palmar (anterior) and posterior (dorsal) radioulnar ligaments
big ulna inserted into articular disc
middle radioulnar jooint
what type of joint
interosseous memrbane
amphiathrosis
syndesmsosi
