Neural Development, Meninges, and CSF

Notes

Brain: Overview Brain: Overview TOPICS: 1. Development 2. Meninges 3. Cerebrospinal Fluid 4. Vasculature • Central Nervous System (CNS) • 2 parts: • 1. • 2. • Peripheral Nervous System (PNS) • 3 divisions: • 1. • 2. • 3. 3 Components Basic Anatomical References Embryonic Development -Nervous system develops from: **Neurulation  1. Begins:  2. Neuroectoderm:  3. Thickens to form:  4. Neural plate sinks & edges thicken  5. Neural groove forms  6. Folds fuse along midline  7. By week 4: 5 Embryonic Development -By 4th week neural tube has 4 major parts  1. Prosencephalon:  2. Mesencephalon:  3. Rhombencephalon:  4. Spinal cord 6 Embryonic Development By 5th week neural tube has all 6 components  1. Prosencephalon  a.  b.  2. Mesencephalon  3. Rhombencephalon  a.  b.  4. Spinal cord 7 Neural Development • Neurogenesis: • Gliogenesis: Neural Development • Synaptogenesis: • Apoptosis: Layers of the Cerebral Cortex Neural Tube Defects Lissencephaly 14-13 • Brain weight • A. male: • B. Female: • Three major portions of the brain: • 1. Forebrain: • 2. Midbrain: • 3. Hindbrain: Brainstem Cerebellum Cerebrum Spinal cord Rostral Caudal Central sulcus Lateral sulcus Gyri (b) ...