Anatomy - Upper Back and Shoulders Flashcards
(17 cards)
Pectoral limb attaches the upper limb to ..
the thorax
2 bones that make up the pectoral girdle
- Clavicle (collarbone)
- Scapula
the 2 ends of the clavicle
Sternal end (attaches to sternum)
Acromial end (attaches to the scapula)
Most clavicle fractures occur in..
the middle third of the clavicle bone
Three joints of the scapula
The sternoclavicular joint is a synovial joint between…
the clavicle, manubrium and first costal cartilage
Shape of the sternoclavicular joint
saddle-shaped (bi-axial - can move in 2 planes)
The acromioclavicular joint (synovial) has limited movement due to..
several strong ligaments that connect the clavicle and scapula, allowing them to move as one unit (they do not move independently of one another)
Why is the scapulothoracic joint NOT an anatomical joint?
It is a physiological joint: permits motion of bones without the usual features of synovial joints (it is between 2 muscles)
Scapulothoracic joint is located between 2 muscle surfaces
- subscapularis
- serratus anterior
Anterior muscles that allow movement of the scapulothoracic joint
- Pectoralis minor
- Subclavius
Lateral muscle(s) that allow movement of the scapulothoracic joint
Serratus anterior (primary protractor of the scapula)
4 posterior back muscles
- Trapezius
- Levator scapulae
- Rhomboid major and minor
- Latissimus dorsi
Facet of the shoulder joint (glenohumoral joint)
Glenoid facet
The glenoid facet articulates with…
the proximal humerus
Muscle attachment site for the deltoid on the humerus
deltoid tuberosity
Only muscle that crosses the glenohumoral joint
Teres major (starts on the backside
