The main pathways through the brain stem are illustrated in Figure 33. The corticospinal tract, medial lemniscus, spinothalamic tract, and spinocerebellar tracts are the most important clinically. Not shown is the cortico-bulbar tract, which accompanies the corticospinal tract and connects, among other things, with the various brain stem motor nuclei. Unilateral damage
facial motor nucleus-Internal acoustic meatus -
Stylomastoid foramen ■
-Lacrimal gland (tearing)
■Taste(anterior 2/3 of tongue) and Submaxillary and sublingual glands (salivation]
Fig. 32 Schematic view of the course of CN7.
MOTOR CORTEX THALAMUS
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