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23 Cards in this Set
- Front
- Back
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what are the 5 main etiologies of RC injuries
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1) primary compressive cuff disease
2) primarey tensile failure/overload 3) primary traumatic overload 4) secondary compressive cuff disease/primary instability |
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what is the primary compressive cuff disease
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primary compression of the rotator cuff under the acromion/coracoacromial ligament and ACJoint
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what is the most common problem of the rotator cuff
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primary compression of the RC under the acromion/coracoacromial lig and ACJ
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what are the two common causes of primary compressive cuff disease
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1) hypomobility of the GHJ
2) poor muscle coordination/balance |
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what is the effect of the hypomobile GHJ
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decreased inferior glide of the humeral head with shoulder elevation --> upward displacement of humeral head --> impingement
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whats it the effect of poor muscle coordination/balance
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improper mechanics of the shoulder
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what is a common muscular pattern for someone with rotator cuff tendinitis
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combination of:
1) poor control of the scapula 2) excessive deltoid action 3) weak supraspinatus |
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poor muscle coordination/balance leading to primary compressive cuff disease is especially common when
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if ther eis a downward rotation of the scapula (from weak scapular stabilizers) related to poor posture or weakness of upward rotators
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the process of progressive degeneration of the tendon under the acromion is considered ______ (explain)
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an extraarticular lesion (surface tear) meaning the tendon is wearing out from the outside to inside
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muscular fatigue of the RC causes
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increased upward humeral head migration ---> tendon impingement/injury
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what is the treatment for primary compressive cuff disease
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addressing the mechanical deficiencies or activities
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explain primary tensile failure/overload
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repetitive high tensile stresses placed on the RC muscles causing stress failre
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what etiology of RC injuries is specific to throwing sports.... and why
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primary tenile failure/overload because of eccentric overload of the musculature
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what is the treatment for primary tensile failure/overload
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controlling activity level followed by rigorous strengthening and dynamic control. Arthroscopic debridement may be necessary
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explain primary traumatic overload
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forceful arm elevation with IR of the arm
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with primary traumatic overload when will the RC tear and whenwould it be expected not to tear
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>45 the RC might tear; if <45 typically no tear will occur
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what is the treatment for a primary traumatic overload
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treat the pain and inflammation resulting from the acut injury followed by progressive rehabilitation in range of motion and strengthening exercises
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what is secondary compressive cuff disease WITH primary instability
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a decrease in the quality of the passive restraints of the GHJ --> increase load on RC to stabilize the shoulder
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what causes the compression in secondary compressive cuff disease WITH primary instability
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poor dynamic stabilization leading to excessive upward diplacement of the humeral head
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what is the treatment for secondary compressive cuff disease WITH primary instability
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initially address the inflammation and pain of the RC then strengthen the dynamic stabilizers (rc)
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what is secondary tensile overload WITH primary instability
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excessive laxity of the GHJ increases the loading forces on the RC to protect the integrith of the joint and prevent excessive humeral head translation
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what does the instability in secondary tensile overload WITH primary instability casue
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increase rotator cuff demands leading to tendon failure
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what is the treatment for secondary tensile overload WITH primary instability
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address activity level and strengthen the dynamic stabilizers
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