12.1

Decerebrate rigidity (forearm level)

From Magee DJ. Chapter 2 – Head and Face, Orthopedic Physical Assessment. 6 ^th ed. Elsevier/Saunders; 2014

• 1.
  

  Clinical feature: elbow extension and forearm pronated posture on supine.

  
  
• 2.
  

  Botulinum toxin injection:

  
  
  
  
  • 
    

    Primary target muscles: triceps (3-14) and pronator teres (4-2)

  
  

Note: pronator quadratus is more active pronator at elbow flexion position (pronator teres is active at elbow extension).

12.2

Decorticate rigidity (forearm level)

From Magee DJ. Chapter 2 – Head and Face, Orthopedic Physical Assessment. 6 ^th ed. Elsevier/Saunders; 2014

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1. Upper arm
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