FIG 1. Blink reflex. Diagram shows presumed location of the bulbar interneurons subserving the two components of the blink reflex: (1) interneurons subserving the ipsilateral early components; (2) interneurons subserving the bilateral late component. (Vm indicates trigeminal motor nucleus; Sp V co, spinal trigeminal complex; Sp V tr, spinal trigeminal tract; VI, abducens nucleus; VII, facial nucleus; VII, facial nerve; VN, trigeminal sensory root; XII, hypoglossal nucleus; Lat tegm field, lateral tegmental field; Med tegm field, medial tegmental field.) Modified from (5) and used with permission