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George E. Carvell, PhD, PT   University of Pittsburgh
 
NEUROEMBRYOLOGY: Differentiation (Parts is Parts, Part 2)
Mesencephalon:
Midbrain
BC&P Fig. 7.15, p. 185
The midbrain is derived from the mesencephalon. Of all the brain vesicles it changes the least. Nevertheless, the midbrain is the location of many important structures. The red nucleus, substantia nigra, periaqueductal gray, and reticular formation nuclei associated with consciousness will develop from tegmental gray. The superior & inferior colliculi will develop from the tectum of the midbrain gray. The cerebral peduncles contain white matter axons that represent the output of cerebral cortex to brainstem and the spinal cord.
Cerebral peduncles