chapter 4 Flashcards
The only attachment of the upper extremity to the axial skeleton is via the …..and its attachment through the …… at the……
scapula; clavicle, sternoclavicular joint
Which two bones are primary involved in the movement of the shoulder gridle?
scapula and clavicle
This joint is not a true synovial joint, due to its not having regular synovial features and to the fact that its movement is totally dependent on the sternoclavicular and acromioclavicular joints
scapualtoracic
This joint is classified as an arthrodial joint. It has a 20- to 30-degree total gliding and rotational motion accompanying other shoulder girdle and shoulder joint motions.
acromicalavicular joint
This is classified as a (multiaxial) arthrodial joint although there is anatomical justification to classify it as a sellar joint. In relation to the manubrium of the sternum, the clavicle moves anteriorly 15 degrees with protraction and moves posteriorly 15 degreesPage 92 with retraction.
sternoclavicular joint
Movement of the scapula laterally away from the spinal column, as in reaching for an object in front of the body
Abduction (protraction)
Movement of the scapula medially toward the spinal column, as in pinching the shoulder blades together
adduction (retraction)
Upward or superior movement of the scapula, as in shrugging the shoulders
elevation
Downward or inferior movement of the scapula, as in returning to a normal position from a shoulder shrug
depression
Turning the glenoid fossa upward and moving the inferior angle superiorly and laterally away from the spinal column to assist in raising the arm out to the side
upward rotation
Returning the inferior angle medially and inferiorly toward the spinal column and the glenoid fossa to its normal position, as in bringing the arm down to the side. (Once the scapula has returned to its anatomical position, further downward rotation actually results in the superior angle moving slightly superomedial.)
downward rotation
true or false:The shoulder joint and shoulder girdle work together in carrying out upper-extremity activities
true
Consequential movement during abduction in which the scapula rotates about its vertical axis, resulting in posterior movement of the medial border and anterior movement of the lateral border
lateral tilt
Return from lateral tilt; consequential movement during extreme adduction in which the scapula rotates about its vertical axis, resulting in anterior movement of the medial border and posterior movement of the lateral border
medial tilt
Consequential rotational movement of the scapula about the frontal axis occurring during hyperextension of the glenohumeral joint, resulting in the superior border moving anteroinferiorly and the inferior angle moving posterosuperiorly
anteiror tilt
Consequential rotational movement of the scapula about the frontal axis occurring during hyperflexion of the glenohumeral joint, resulting in the superior border moving posteroinferiorly and the inferior angle moving anterosuperiorly
posterior tilt
Scapula is an …… bone.
ireggular
Shoulder girdle serves as a ……from which the ……..moves
base; upper extremity moves
Scapula provides attachment point of the …..
upper extremity