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Cerebral Aqueduct definition: Narrow channel in the mesencephalon that connects the third and fourth ventricles.
Mesencephalon definition: The middle of the three primitive cerebral vesicles of the embryonic brain. Without further subdivision, midbrain develops into a short, constricted portion connecting the PONS and the DIENCEPHALON. Midbrain contains two major parts, the dorsal TECTUM MESENCEPHALI and the ventral TEGMENTUM MESENCEPHALI, housing components of auditory, visual, and other sensorimoter systems.
mesencephalon definition: develops from the middle of the 3 primary vesicles of the embryonic neural tube, between the prosencephalon and rhombencephalon, later forming the tectum and cerebral peduncles.
Midbrain definition: Organ component of neuraxis that has as its parts the tectum, cerebral peduncle, midbrain tegmentum and cerebral aqueduct. Examples: There is only one midbrain.
Mesencephalon definition: The uppermost portion of the brainstem located between the pons and the diencephalon. The midbrain contains the cerebral peduncles, oculomotor, trochlear and red nuclei, substantia nigra and various other nuclei and tracts.
midbrain development definition: The process whose specific outcome is the progression of the midbrain over time, from its formation to the mature structure. The midbrain is the middle division of the three primary divisions of the developing chordate brain or the corresponding part of the adult brain (in vertebrates, includes a ventral part containing the cerebral peduncles and a dorsal tectum containing the corpora quadrigemina and that surrounds the aqueduct of Sylvius connecting the third and fourth ventricles). [http://www2.merriam-webster.com/cgi-bin/mwmednlm?book=Medical&va=midbrain]
cell proliferation in midbrain definition: The multiplication or reproduction of cells, resulting in the expansion of a cell population in the midbrain. [GO_REF:0000021, GOC:df]
mésencéphale definition: Partie du tronc cérébral reliée au cerveau, formé des deux pédoncules cérébraux, du tegmentum et du tectum.