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What are some key Humeral landmarks?
Head, greater and lesser tubercle, intertubercular groove, and deltod tuberosity
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Key boney landmarks to know
acromion process, glenoid fossa, lateral border, inferior angle, medial border, superior angle, spine of scapula
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What kind of joint is GH joint?
supported by what only, this leads to what injuries?
what is like meniscus in knee and adds stability?
- multaxial enarthrodial
- only by mms, leads to inf. and ant. dislocations
- glenoid labrum
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GH ligs provide support esp. where?
ligs are lax until extreme _____ is reached due to wide ROM involved.
____ is sacrificed to gain ____
- anteriorly and inferiorly (inferior glenohumeral lig)
- ROM
- Stability sacrificed for mobility
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what degrees is shoulder joint abduction and adduction?
90 to 95 and 0 (75 ant. to trunk)
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what are the degrees for GH flexion and extension?
90 to 100 and 40 to 60
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what are the degrees for int/ext rotation, horizontal add, and horizontal abd
- internal and external is 70 to 90
- horizontal add is 135
- horizontal ab is 45
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If shoulder girdle moves freely than the total range of combined movements for abduction, flexion, and horizontal add are....?
- 170 to 180
- 170 to 180
- 140 to 150
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What 3 anatomical features cause this ares to be injured frequently???
- shallowness of glenoid fossa
- laxity of ligamentous structures
- lack of strenght and endurance in mms
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what are the most common kind of subluxations and dislocations??
Posterior problems??
- anterioinferior sublux and disloc are common
- posterior dislocations are rare
- posterior instability problems are common
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Rotator cuff mms and their placement??
- subscap is ant!
- supra is sup!
- infra is inf!
- teres minor is post/inf!
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rotator cuff mms attach to the front top and rear of ____ head.
point of insertion allows for ____ rotation
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rotator cuff mms are vital in mantiaining humeral head in correct approximation within ____ ____ while more powerful mms move ____ throughout its wide ROM.
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What is GIRD?
overhead athletes with gird of greater than ___% had a higher risk for injury
____ exercises are recommended to regain internal rotation
- Glenohumeral internal rotation deficit
- diff internal rot rom between throwing and non throwing arms
- stretching
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what are the pairings of shoulder joint and shoulder girdle (scapular) movements?
- easy...
- ab with upward rotation
- flexion with upward rotation and elevetion
- interal rotation with abduction
- horizontal add with abduction
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GH is paired with ___ ___ to accomplish total shoulder ___
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scapulohumeral rhythm is a ____ relationship?
what is the ratio between gh motion and scapular motion??
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what are the 10 movements of GH joint?
how does humerus move on rotations?
- flex and ext
- int and ext rot
- hori/diag/norm ab and add
- Ext: moves laterally along axis away from midline
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What are the intrinsic GH mms?
- deltoid corochobrachialis teres major
- rotator cuff group
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whata are the extrinsic GH mms?
Lats and pec major
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what are the anterior, superior, and posterior GH mms???
- ant: coracobrachialis, pec major, subclavius
- sup: delts and supraspinatus
- post: infraspinatus, teres major, teres minor, lats
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what are the agonists for glenohumeral flexion?
anterior deltoid and upper pec major
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what are the agonists for glenohumeral extension/adduction??
- teres major
- lats
- lower pec major
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what are the agonists for glenohumeral abduction?
- deltoid
- supraspinatus
- upper pec major
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what are the agonists for GH horizontal abduction?
- posterior delt
- middle delt
- infraspinatus
- teres minor
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what are the agonists for GH horizontal adduction?
- anterior delt
- corochobrachialis
- pec major
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what are the agonists for gh internal rotation?
- same as adduction
- just make it lowe pec and add subscap
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what are the agonists for gh external rotation?
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what are the agonists for gh diagonal abduction?
- posterior delt
- infraspinatus
- teres minor
- triceps brachii long head
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what are the agonists for gh diagonal adduction?
- anterior delt
- pec major
- coracobrachialis
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What are the actions of the deltoid mms?
Anterior/posterior/middle...
what do they all do??
- ant: flexion, horixontal add, and ext rotation
- midd: abduction
- post: opposite anterior
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What are the actions of the upper fibers the pec major as well as the lower fibers??
- Upper: internal rotation, horizontal adduction, adduction, abduction, and flexion
- Lower: all the same except flexion is extension and there is no abduction
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shoulder impingement is the compression of what three tissues?
What arch are these located under?
- supraspinatus tendon, subacromial bursa, and long head of the biceps tendon
- the are located under the coracoacromial arch!
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Failure of Rotator cuff to maintain position of the humeral head in the glenoid will allow for excessive ____ of the humeral head
translation
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Prolonged inflammation due to impingement can cause decresed muscular efficiency which can lead to what injuries?
labrum tear, tear of supraspinatus tendon and biceps tendon
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