Level of the Substantia Nigra, the Cerebral Aqueduct

A. Cerebral Aqueduct
B. Inferior Colliculus
C. Oculomotor Nucleus
D. Substantia Nigra
E. Interpeduncle Fossa
F. Cerebral Peduncle
G. Parieto-occopitotemporal Pontine Fibers
H. Corticospinal Tract
I. Corticobulbar Tract
J. Frontopontine Fibers
K. Lateral Lemniscus
L. Anterolateral System
M. Medial Lemniscus (lower limb fibers)
N. Medial Lemniscus (upper limb fibers)
O. Decussation of Superior Cerebellar Peduncle
P. Periaqueductal Gray Matter
Q. Medial Longitudinal Faciculus
R. Reticular Formation
S.