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Cranial Nerve III, IV and VI
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Oculomotor, Trochlear, and Abducens Nerves

Introduction

  • These nerves are presented together as they are examined simultaneously during the cranial nerve exam while testing for ocular movements. Movements of the eyes are assessed through the six cardinal points of gaze: pupil size, response to light, saccades, convergence, divergence, and opening of the upper eyelids

Tests to be performed

  • Response to light
  • Tracking
  • Saccades
  • Convergence and divergence

Expected findings

  • Equal pupil size, equal and consensual response to light and accommodation, symmetric eye movements in all six points of gaze, and normal tone and movement of the upper eyelids

Equipment

  • Pen flashlight and two pencils
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Section: Cranial Nerves III, IV and VI
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Page 1 of 15
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