Shoulder Girdle Flashcards
The Glenohumeral Joint is a _______axial joint.
Tri-axial
Provides the shoulder girdle with its only direct attachment to the trunk.
Sternoclavicular Joint (SC)
Binds the clavicle to the sternum on both the anterior and posterior surfaces.
Sternoclavicular Ligament
Binds the clavicle to the cartilage of the first rib.
Costoclavicular Ligament
Bridges between the two clavicles.
Interclavicular Ligament
Connects the acromion process of the scapula with the lateral end of the clavicle.
Acromioclavicular Joint (AC)
Provides stability and allows the scapula to be suspended by the clavicle.
Coracoclavicular Ligament
Forms a protective arch over the head of the humerus. Provides support to the head when an upward force is transmitted along the humerus.
Coracoacromial Ligament
The scapula glides on the thorax and is attached to the thorax both by muscles, and through the clavicle to the sternum. T2-T7.
Scapulothoracic Joint
Inferior angle of the scapula rotates up and away from the vertebral column.
Upward Rotation
Occurs when shoulder goes into hyperextension. Superior end of the scapula tilts anteriorly.
Scapular Tilt
When there is flexion or abduction of the glenohumeral joint there must also be ______ of the scapula.
Upward Rotation
When there is extension or adduction of the shoulder joint the scapula _____ to return to anatomical position.
Downward Rotation
Glenohumeral Flexion = Scapula _____.
Upward Rotation, Protraction
Glenohumeral Extension = Scapula _____.
Downward Rotaiton, Retraction
Glenohumeral Abduction = Scapula ____.
Upward Rotation
Glenohumeral Adduction = Scapula ____.
Downward Rotation
The first 30 degrees of humeral elevation is at the glenohumeral joint.
Scapulothoracic Rhythm
For every 2 degrees of shoulder elevation, the scapula must upwardly rotate __ degrees.
1
5 muscles responsible for moving the scapula
Trapezius, Levator Scapula, Rhomboids, Serratus Anterior, Pectoralis Minor
Diamond-shaped when looking at both right and left sides.
Trapezius Muscle
All three trapezius work together to retract the scapula. _____ is the prime mover.
Middle Trapezius
___ and ___ trapezius are antagonists to each other for elevation/depression.
Upper and Lower Trapezius
____ and ___ trapezius are agonists in upward rotation.
Upper and Lower Trapezius
Vertebral border lifting away from the rib cage.
Winging of the Scapula
Prime Movers Retraction
Middle Trapezius, Rhomboids
Prime Movers Protraction
Serratus Anterior, Pectoralis Minor
Prime Movers Elevation
Upper Trapezius, Levator Scapula, Rhomboids
Prime Movers Depression
Lower Trapezius, Pectoralis Minor
Prime Movers Upward Rotation
Upper/Lower Trapezius, Serratus Anterior
Prime Movers Downward Rotation
Rhomboids, Levator Scapula, Pectoralis Minor
Prime Movers Scapular Tilt
Pectoralis Minor
Muscles pulling in different directions to accomplish the same motion.
Force Couple
If the insertion of the muscle is stabilized, the origin will move toward the _____.
Insertion
