- Brainstem—Part One 157
Gracile
Cuneate Nucleus
nucleus
Internal arcuate fibers
Medial
lemniscus
Corticospinal tracts
Inferior olive
Antero-
lateral
Anterior system
trigemino-
thalamic
tract
Medial
longitudinal
fasciculus
Tecto-
spinal
tract
Rubrospinal
tract
Area 4th ventricle
postrema
*Cranial nerve
nuclei:
(5), (8),
9, 10, 12
Reticular
formation
Raphe
nuclei
Central gray
area
Inferior cerebellar
peduncle
Spinocerebellar
tracts
Posterior
Left
Anterior
Right
Pyramidal decussation
(Pyramid)
NUCLEI TRACTS
Tegmentum
*Position of cranial nuclei Base
NOT accurately depicted
DRAWING 9-5 Th e Medulla