Test
Sensory Nerve
(Afferent Pathway)
Motor Nerve
(Efferent Pathway)
Brainstem Level
Pupillary Reflex
Optic nerve (II)
Oculomotor nerve (III)
Midbrain, pretectal olivary and Erdinger-Westphall nuclei
Corneal Reflex
Ophthalmic branch of trigeminal nerve (V)
Facial nerve (VII)
Pons, trigeminal and facial nuclei
Caloric (Oculo-vestibular) Reflex
Vestibulocochlear nerve (VIII)
Oculomotor nerve (III) & abducens nerve (VI)
Pons, nucleus vestibularus, nucleus abducens
Painful Stimulation (Brow)
Ophthalmic branch of trigeminal nerve (V)
Facial nerve (VII)
Pons, trigeminal and facial nuclei
Painful Stimulation (Limb)
Lateral spinothalamic tract
Facial nerve (VII)
Pons, trigeminal and facial nuclei
Gag Reflex
Glossopharyngeal nerve (IX)
Vagus nerve (X)
Medulla, nucleus tractus solitarius
Cough Reflex
Vagus nerve (X)
Vagus nerve (X)
Phrenic & intercostal nerves
Phrenic & intercostal nerves
Medulla, nucleus tractus solitarius