II. Pathophysiology

  1. Suprascapular nerve impingement (typically by ligament at the Scapular notch)

III. Causes

  1. Clavicle Fracture
    1. Suprascapular Nerve runs posterior to clavicle and subject to injury
  2. Repetitive overhead activity
    1. Risk of Stretching injury at the suprascapular notch and the spinoglenoid notch
  3. Glenoid Labrum Tear with secondary cyst formation
    1. May entrap and compress the suprascapular nerve

IV. Symptoms

  1. Infraspinatus weakness
    1. Weak external rotation at the Shoulder
  2. Supraspinatus weakness (variably involved)
    1. Weak arm elevation overhead

V. Differential Diagnosis

VI. Diagnostics

  1. MRI Shoulder
    1. Evaluate for Rotator Cuff Tear, Labral Tear
    2. Obtain early in course (i.e. first month)

VII. Management

  1. Referral to orthopedic surgery if Rotator Cuff Injury or space occupying lesion
  2. Peripheral Nerve Block
  3. Physical Therapy
    1. Shoulder Range of Motion Exercises
    2. Strengthen compensatory Muscles
  4. Avoid reinjury
    1. Avoid heavy lifting
    2. Avoid repetitive overhead activity

VIII. Course

  1. Anticipate 6-12 month course with therapy

Images: Related links to external sites (from Bing)

Related Studies

Ontology: Suprascapular nerve compression (C0393890)

Concepts Disease or Syndrome (T047)
SnomedCT 230635000
English Suprascapular nerve compress, suprascapular nerve entrapment, suprascapular nerve entrapment (diagnosis), Suprascapular nerve compression, Suprascapular nerve compression (disorder)
Spanish compresión supraescapular nerviosa (trastorno), compresión supraescapular nerviosa

Ontology: Suprascapular nerve injury (C0434249)

Concepts Injury or Poisoning (T037)
SnomedCT 212285004
English Suprascapular nerve injury, Suprascapular nerve injury (disorder)
Spanish lesión del nervio supraescapular (trastorno), lesión del nervio supraescapular

Ontology: Suprascapular nerve lesion (C0574904)

Concepts Disease or Syndrome (T047)
SnomedCT 298118004
English Suprascapular nerve lesion, Suprascapular nerve lesion (disorder)
Spanish lesión de nervio supraescapular (trastorno), lesión de nervio supraescapular