19/07/2025
𝙎𝙝𝙤𝙪𝙡𝙙𝙚𝙧 𝙄𝙢𝙥𝙞𝙣𝙜𝙚𝙢𝙚𝙣𝙩 𝙎𝙮𝙣𝙙𝙧𝙤𝙢𝙚 (SIS)
Also called Subacromial Impingement syndrome
𝘿𝙚𝙛𝙞𝙣𝙞𝙩𝙞𝙤𝙣
-Condition where rotator cuff tendons or subacromial bursa get compressed within the subacromial space.
-Leads to inflammation, pain, and dysfunction, especially during overhead activities.
𝘼𝙣𝙖𝙩𝙤𝙢𝙮 𝙄𝙣𝙫𝙤𝙡𝙫𝙚𝙙
Subacromial space lies between acromion and humeral head.
Key structures in the space:
-Supraspinatus tendon
-Subacromial bursa
-Long head of biceps tendon
•Rotator cuff muscles: Supraspinatus, Infraspinatus, Teres Minor, Subscapularis.
𝘾𝙖𝙪𝙨𝙚𝙨
•Intrinsic (Within Tendon)
-Degenerative tendon changes (age-related)
-Hypovascularity of supraspinatus tendon
-Overuse from repetitive shoulder motions
•Extrinsic (Mechanical Compression)
-Hooked or curved acromion
-Bone spurs under acromion
-Thickened coracoacromial ligament
-Acromioclavicular joint osteophytes
𝙁𝙪𝙣𝙘𝙩𝙞𝙤𝙣𝙖𝙡 𝘾𝙖𝙪𝙨𝙚𝙨
-Poor scapular control
-Forward head or rounded shoulder posture
-Muscle imbalance: weak rotator cuff, tight pectorals
-Improper lifting mechanics or technique
𝙉𝙚𝙚𝙧'𝙨 𝘾𝙡𝙖𝙨𝙨𝙞𝙛𝙞𝙘𝙖𝙩𝙞𝙤𝙣
• 𝙎𝙩𝙖𝙜𝙚 I:
-Edema and hemorrhage in tendons or bursa
-Common in 40 years
-May require surgical intervention
𝙎𝙮𝙢𝙥𝙩𝙤𝙢𝙨
-Pain over anterior or lateral shoulder
-Pain during overhead activities
-Night pain (especially lying on affected side)
-Painful arc between 60–120° of abduction
-Weakness and reduced range of motion
-Tenderness over greater tuberosity or subacromial
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