Bulbocavernosus Reflex

Aka: Bulbocavernosus Reflex, Bulbospongiosus Reflex, Osinski Reflex

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II. Pathophysiology

  1. Anal sphincter contraction relies on S2-4 innervation

III. 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

IV. Interpretation

  1. Bulbocavernosus Reflex absent
    1. Spinal Shock
  2. Bulbocavernosus Reflex present
    1. Severed spinal cord

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