Fig. 1
From: The course of facial corticobulbar tract fibers in the dorsolateral medulla oblongata
Classification of the lesion in the rostro-caudal direction on brain magnetic resonance imaging. a Upper medulla: the level with an inferior cerebellar peduncle bulging outward. b Middle medulla: the level with an outward bulging due to the inferior olivary nucleus. c Lower medulla: the level presenting a round shape, and without an outward bulging due to the inferior olivary nucleus. These images are the authors’ original work