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kines exam 2

QuestionAnswer
what's the most prominent structure of the scapula? spine (let's us know if we are looking at front or back)
what are the bones associated with the shoulder girdle articulation between clavicle and scapula
what are the muscles to know for the shoulder girdle? pectoralis minor, trapezius, serratus anterior
pectoralis minor origin- 3rd-5th ribs insertion- coracoid process scapula movements- abduction (protraction), downward rotation, depression movements= pushing ex/ bench press or pushups -pulls scapula forward with downward rotation
trapezius upper middle (2) and lower fibers -when all parts work together, they pull the scapula upwards and into adduction -prevents scapula being pulled down -a fixator of scapula which allows for deltoid action
trap upper fibers (weakest) -origin- base of skull, backside ligaments of neck insertion- back of lateral clavicle scap mvmt- elevation mvmt- shrug during clean pulls
trap middle fibers origin- upper back (7th cervical and 3 thoracic vertebrae) insertion- upper border of scapular spine scap mvmt- elevation, abduction (retraction), upward rotation mvmt- rowing, jumping jacks, shrug diring clean pulls
trap lower fibers origin- mid back , (4-12 vertebrae) insertion- base of scapula spine scap mvmt- adduction (retraction), depression, upward rotation mvmt- rowing, jumping jacks
serratus anterior origin- surface of ribs on the side insertion- front medial border of scapula scap mvmt- abduction -protraction), upward rotation mvmt- pushing mvmts (ex/pushups benchpress) cause scapula abduction (protraction) with pec minor
adduction (retraction) as it relates to scapula pinching shoulder blades together ex/ downward motion of bench press
abduction (protraction) reaching for object in front of the body ex/ upward motion of bench press
elevation scap goes up ex/ shrugs
depression scap goes down ex/ farmers walks
upward rotation ex/ upward motion of jumping jacks
downward rotation ex/ down motion of jumping jacks
concentric part of movement -"the harder part of the lift" -muscles are getting shorter (contracting to produce force) ex/ upward motion of squat
eccentric part of movement -"the easier part of the lift" -muscles are lengthening ex/ downward part of squat
sternoclavicular joint arthrodial joint (sliding/gliding, multiaxial) mvmts= up, down front and back ligament support= anterior and posterior sternoclavicular ligaments, costoclavicular ligament
acromioclavicular joint arthrodial joint (sliding/gliding, multiaxial) -sliding, gliding and rotational mvmts, helps other scapular mvmts too ligamentous support- coroclavicular ligaments, s and i acromioclavicular ligments
scapulothoracic joint articulation of scapula over thorax (space btwn scapula and thoracic cage) -not a true synovial joint no ligamentous support! supported by muscles. dependent on acromioclavicular and scapulothoracic joint, if they're not moving this joint isnt moving.
what are the joints associated with the true elbow joint ulna and humerus
what are the four rotator cuff muscles? Supraspinatus Infraspinatus Teres minor Subscapularis
supraspinatus abduction and external rotation
infraspinatus external rotation
teres minor external rotation
subscapularis internal rotation
what is the role of the glenoid labrum? ring of fibrous tissue attached to the rim of glenoid fossa -expands the size & depth of glenoid fossa (deeper socket= more stable joint) increases superior-inferior diameter by 75% increases anterior-posterior diameter by 50%
ligament support of the elbow joint (play more role in in extreme range of motion) -annular ligament -radial collateral ligament (humerus and radius) -ulnar collateral ligament (ulna and humerus) -prevents elbow from abducting -throwing sports place stress on UCL
Created by: emma.thornton
 

 



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