Histogenesis

Hearing Loss Diagrams And Alport Syndrom

Figure 12-2. Neural tube vesicles. (A) Diagram of an embryo at week 6 cross-sectioned at the level of the heart tube (H) and gut tube (G), showing the five secondary vesicles extending out from the embryo. (B) This median magnetic resonance (MR) image of an adult shows the derivatives of the secondary vesicles. T = telencephalon; D = diencephalon; MS = mesencephalon; MT = metencephalon; MY = myelencephalon; SP = spinal cord. (13, From Fleckenstein P and Tranum-Jensen J: Anatomy in Diagnostic Imaging. Philadelphia, WB Saunders, 1996, p 169. Copyright 1993 by Munksgaard, Copenhagen, Denmark.)

Figure 12-2. Neural tube vesicles. (A) Diagram of an embryo at week 6 cross-sectioned at the level of the heart tube (H) and gut tube (G), showing the five secondary vesicles extending out from the embryo. (B) This median magnetic resonance (MR) image of an adult shows the derivatives of the secondary vesicles. T = telencephalon; D = diencephalon; MS = mesencephalon; MT = metencephalon; MY = myelencephalon; SP = spinal cord. (13, From Fleckenstein P and Tranum-Jensen J: Anatomy in Diagnostic Imaging. Philadelphia, WB Saunders, 1996, p 169. Copyright 1993 by Munksgaard, Copenhagen, Denmark.)

C. Microglia (Hortega cells) arise from monocytes within the bone marrow and migrate into the CNS along with the vasculature. These cells are the macrophages of the CNS.

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