Final Exam review: Shoulder Flashcards
What bones are in shoulder complex?
*Clavicle
* Scapula
* Humerus
What joints comprise the shoulder complex?
- STERNOCLAVICULAR
*ACROMIOCLAVICULAR
*SCAPULOTHORACIC (not a true joint)
*GLENOHUMORAL
What are the 6 types of synovial joints?
*Hinge joint = elbow joint and knee joint
*Ball & Socket Joint = shoulder joint & hip joint
*Pivot Joint = allows rotational movement around a central axis. atlas & axis in the neck
*Condyloid Joint = allows movements in two planes. wrist joint & metacarpophalangeal joints
*Saddle Joint = allows for a wide range of motion, including flexion, extension, abduction, adduction, and circumduction. carpometacrpal joint of the thumb.
* Gliding joint = allow for limited gliding or sliding movements in various directions. intercarpal and intertarsal joints.
What is the motion of the sternoclavicular joint?
*three axis
- Anterior-posterior = elevation and depression
- Vertical superior-inferior= protraction and retraction
- Medial-lateral = upward and downward rotation
What supports the acromioclavicular joint?
Supported by the capsule, acromioclavicular ligaments, and the coracoclavicular ligament.
Describe the articular surface of the acromioclavicular
joints are relatively flattened and beveled with respect to one another.
What are the supporting structures of glenohumeral joint?
Labrum; Capsule; Ligaments; Surrounding Musculature.
What are the articular surfaces of the glenohumeral joint?
The humoral head and the glenoid fossa possess similar curvatures.
What are the primary stabilizers of the Glenohumeral joint?
*supraspinatus
*Infraspinatus
*Teres Minor
*Subscapularis
What are the Passive Stabilizers of the shoulder?
Stability is provided more by muscles, ligaments, and soft tissues than by bone.
What is the Glenoid Labrum?
- deepens the glenoid fossa
What is the labrum?
ring of fibrous tissue and fibrocartilage around the periphery of the fossa.
What is force coupling?
Two equal forces that are placed in opposite directions and act simultaneously around an axis, which creates a rotation. In this case, muscles moving around the axis.
What is a moment of force?
A measure of its tendency to cause a body to rotate about a specific point or axis.
M=F x d
moment = force x distance
what is Subluxation?
A partial dislocation