3: Scapula & Arm Bones Flashcards
consists of the scapula and the humerus
shoulder joint
shallow cavity where the humeral head goes
glenoid fossa
cartilage that goes around the glenoid fossa
glenoid labrum
glenoid fossa and glenoid labrum together make this
glenoid cavity
NOT at true joint. no ligaments or articular capsule. scapula just rest on the muscle over top the rib cage, allowing for passive movements
scapulothoracic joint
where the clavicle and the sternum articulate. movement is slight in all directions and of a gliding, rotational type
sternoclavicular joint
where the clavicle and scapula (acromion process) articulate. movement is a slight gliding when elevation and depression take place
acromioclavicular joint
the shoulder joint
glenohumeral joint
helps to stabilize and move the scapula. elevation, depression, upward and downward rotation
scapulothoracic joint
small amount of movement as ROM increases, clavicle tilts up
sternoclavicular joint
permits greater ROM. connects collarbone to shoulder blade
acromioclavicular joint
most flexible joint. mobility over stability
glenohumeral joint
acts as a strut maintaining the upper limb away from the thorax, which allows the greater ROM to occur
clavicle
functions as the joint capsule by tying together and totally surrounding the lateral end of the clavicle and the acromion process
acromioclavicular ligament
has anterior, superior, and posterior fibers to help with the SC articulation
sternoclavicular ligament
when the humerus head comes completely out of the joint, ball comes out of socket. usually occurs when arm is abducted and shoulder flexion (arm raised up). once out of socket, arm hangs limp
shoulder dislocation
separation of the clavicle from the acromion process
shoulder separation, acromioclavicular separation
when the shoulder comes out and then goes back in on its own. typically bone rubbing on bone instead of gliding.
subluxation
when the supraspinatus tendon is compressed between the humeral head and the acromion process, which causes pain and weakness in the shoulder
shoulder impingement
often fractured. susceptible to compressive forces and blows. will break if you fall on an outstretched arm. only bony attachment that the upper extremity has to the trunk
clavicle
lateral rounded condyle of humerus
capitulum
medial pointy condyle of humerus
trochlea
divot between condyles on anterior side of humerus
coronoid fossa
big divot on posterior side of humerus
olecranon fossa
