| However, at later stages, the specification of the prosencephalon and the mesencephalon remains defective. |
| The GnRH forms not found in the POA are expressed in two other distinct cell groups, one located in the terminal nerve region, the other in the mesencephalon. |
| In the case of dopaminergic neurons of the ventral mesencephalon of the human embryo, the period when these cells are in this particular phase occurs around the ninth week of the embryo's life. |
| The second primary brain vesicle, the mesencephalon, gives rise to the midbrain, which, in higher vertebrates, takes part in coordinating visual and auditory stimuli. |
| Midbrain, also called mesencephalon, region of the developing vertebrate brain that is composed of the tectum and tegmentum. |
| Ectoderm from the mesencephalon and rhombomere specifically migrates to the mandibular arch primordium, and rhombomere infiltrates the hyoid arch. |
