[The fine structure of the nucleus of the facial nerve of sheep and goats].

The nucleus of the facial nerve in sheep and goats measures 4 to 6 mm and is divided into 4 groups (dorsal, medial, lateral, intermediate). Electronmicroscopically 5 neuronal types and 4 classes of synapses could be detected. Differences between the species are reduced to the arrangement of the rough endoplasmic reticulum and number of axo-somatic synapses.