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What does the shoulder complex consist of?
- rib cage
What joints are included in the shoulder complex?
- sternoclavicular joint
- acromioclavicular joint
- glenohumeral joint
- scapulothoracic articulation
What is included in the shoulder girdle?
What is included in the shoulder jt?
Which of the shoulder complex joints is not technically a joint and why?
not directly attached, but does provide motion/mvmt and flexibility
How is the scapula attached to the trunk?
by ligaments to clavicle and muscles to trunk
Where is the scapula located?
- between ribs 2 and 7
- spine of scapula at T3 or T4
What landmark on the scapula is the attachment for the levator scapula?
top pointy part
What is the point that determines scapular rotation?
bottom pointy part
What is the landmark of the scapula for the rhomboid and serratus ant. attachment?
side closest to vertebrae
What landmark is on the side opposite of the vertebrae (more lateral)?
What is the scapula landmark for the middle and lower trapezius attachment?
pokey out part on back
What is the pectoralis major (coracobrachialis) attachment?
behind/below the scapula; smaller than the acromion
What is the upper trapezius attachement?
biggest projection off spine
What does the humerus articulate with?
What connects the upper extremity to the axial skeleton at the sternoclavicular jt, and connects to scapula at the acromioclavical jt?
sternal end, acromial end, body
What is the attachment for the clavicle and attaches to costal cartilages of ribs?
manubrium, body, xiphoid process
What joint is easily traumatized, and what type of joint is it?
acromioclavicular jt (AC jt)
synovial, plane shaped, gliding motion occurs at all planes (nonaxial)
Where is the acromioclavicular joint located?
lateral end of clavicle joining with the acromion process
What types of gliding motion does the acromioclavicular jt have?
upward and downward rotation
What are the 3 ligaments of the acromioclavicular jt?
- acromioclavicular ligament
- coracoclavicular ligament
- coracoacromial ligament
What AC ligament prevents posterior dislocation of clavicle?
What is the strongest AC ligament the binds the clavicle to the scapula and gives stability?
What are the 2 parts of the coracoclavicular ligaments?
conoid - medial
trapezoid - lateral
What AC ligament provides a roof over the head of the humerus?
What are the available motions at the shoulder girdle?
- upward/downward rotation (angular motion)
- scapular tilt (hyperextension)
What is the only direct attachment of the shoulder girdle to the trunk?
synovial, plane, gliding
What is between the sternoclavicular jt that acts as a shock absorber and prevents dislocation?
What are the 5 mm. of the shoulder girdle?
- levator scapulae
- serratus anterior
- pectoralis minor
What are the articular surfaces of the glenohumeral joint?
humeral head articulates with glenoid fossa of scapula
What are the motions of the GH joint?
- horizontal abd/add
What fossa is on the anterior portion of the scapula and is the attachment for the subscapularis m.?
What foss of the scapula is posterior, below the spine, and is the attachment for the infraspinatus m.?
What fossa of the scapula is posterior, above the spine, and the attachment for the supraspinous m.?
The axillary border of the scapula is the attachment for what mm.?
teres major and minor
The acromion process of the scapula is the attachment for what m.?
What is the fibrocartilaginous ring that deepens the glenoid fossa?
How do you tell if a humerus is ant/post?
- the hole on the distal end goes in the back
- rounded head goes into fossa
On the humerus, what separates the head from the tubercles?
Where on the humerus is the surgical neck?
below the tubercles
Where is the greater tubercle of the humerus?
lateral to the head
attachment for supraspinous, infraspinous, teres minor
Where is the lesser tubercle of the humerus located?
- attachment for subscapularis
What is another name for bicipital groove and where is it located?
- intertubercular groove
- inbetween greater and lesser tubercles
longhead biceps, medial latissimus dorsi, teres minor, lateral pectoralis major
What are the 2 ligaments of the GH joint?
- glenoid labrum
What is the GH ligament that attaches from the coracoid to medial side of the greater tubercle of the humerus and helps strengthen the jt capsule?
Where is the glenoid labrum ligament?
- fibrous tissue surrounding glenoid fossa
- deepens articular cavity
What are the 2 bursae of the GH joint?
Where is the subdeltoid bursa located?
between the deltoid and jt capsule
Where is the subacromial bursa located?
below acromion and coracoacromial ligament and between the jt capsule
What are the mm. of the rotator cuff?
- subscapular -lesser tubercule
- infraspinous -greater tubercle
- teres minor -greater tubercle
- supraspinous -greater tubercle
What is the scapulohumeral rhythm?
first 30 degrees of shoulder jt mvmt is pure GH mvmt
*if abducting, humeral head must depress, must laterally rotate to achieve full abduction
What do the deltoid and rotator cuff work together to do?
rotator cuff - 3 mm. - subscapular, infraspinous, teres minor