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The Patient

I - Smell

II - Vision

II & III - Pupils

III, IV & VI - Eye Movement

V - Facial Sensation & Jaw Muscles

V & VII - Glabellar & Corneal Reflexes

VII - Facial Movement

VIII - Hearing

IX & X - Throat

XI - Neck & Shoulders

XII - Tongue

Gates P. The rule of 4 of the brainstem: a simplified method for understanding brainstem anatomy and brainstem vascular syndromes for the non‐neurologist. Internal medicine journal. 2005 Apr;35(4):263-6.
Rodríguez-García PL, Rodríguez-Pupo L, Rodríguez-García D. Clinical techniques for use in neurological physical examinations. I. General organisation, cranial and peripheral spinal nerves. Rev Neurol. 2004 Oct; 39(8): 757-66. Link