Exam

Bulbocavernosus Reflex

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Bulbocavernosus Reflex, Bulbospongiosus Reflex, Osinski Reflex

  • Pathophysiology
  1. Anal sphincter contraction relies on S2-4 innervation
  • Technique
  1. Rectal exam and evaluate anal sphincter tone
  2. Perform one of following triggers and evaluate for increased anal tone
    1. Slight traction of Foley Catheter
    2. Compressing/Squeezing glans penis or clitoris
  • Interpretation
  1. Bulbocavernosus Reflex absent
    1. Spinal Shock
  2. Bulbocavernosus Reflex present
    1. Severed spinal cord