II. Mechanism

  1. Prolonged Shoulder hyperabduction
    1. Occurs during sleep
    2. Overhead painting
  2. Compression of neurovascular structures
    1. Pass under coracoid process and pectoralis minor

III. Symptoms

  1. Extremity Numbness and Paresthesias
  2. Less severe than other forms of thoracic outlet

IV. Signs

V. Management

  1. Prevent arm hyperabduction at night
    1. Gauze strip tied to wrist and attached to foot of bed

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