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George E. Carvell, PhD, PT   University of Pittsburgh
NEUROEMBRYOLOGY: Differentiation (Parts is Parts, Part 3)
Pons & Cerebellum
Metencephalon = Rostral Hindbrain
BC&P Fig. 7.16, p. 187
The hindbrain of the 3 vesicle stage will become the metencephalon and the myelencephalon in the 5 vesicle stage. The metencephalon will develop into the pons and the cerebellum from the rostral hindbrain. The cerebellum as shown in fig 7.16 is derived from the rhombic lips of the metencephalon. The cerebellum will greatly expand to become the largest structure beneath the tentorium (posterior fossa) of the cranial vault. The pons contain many cranial nerve nuclei important in sensory and motor functions of the head, and other nuclei important in sensorimotor functions of the body. The cerebellum is the major structure involved in sensorimotor coordination, initiating and implementing complex tasks including cognitive processes. A large gray mass called the pontine nuclei provides a link from cerebral cortex to cerebellum.