Brain-3

Brain-3 - Brain Development: Primary vesicles Secondary...

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Unformatted text preview: Brain Development: Primary vesicles Secondary vesicles Adult brain part Proencephalon Diencephalon Thalamus & Hypothalamus Telencephalon Cerebrum Mesencephalon Mesencephalon Midbrain RhombencephalonMyelencephalon Medulla Oblongata Metencephalon Pons & Cerebellum Cerebrospinal fluid (CSF) - formed in choroid plexes of 4 ventricles: 2 lateral - one in each hemisphere 3rd - interventricular foramen connect with 3rd w/ both lateral vent. 4th - cerebral aqueduct connects 3rd and 4th vent. Three openings (apertures) from 4th into subarachnoid space: 2 lateral, 1 median Returns to blood via arachnoid villa Internal hydrocephallus External hydrocephallus Blood-CSF barrier - fluid barrier Blood brain barrier (BBB) - fluid and structural barrier-capillary walls not fenestrated-thick basement membrane-astrocytes reduce permeability of capillary Medulla: Ascending and descending tracts Inferior cerebellar peduncles (ICP) - medulla to cerebellum Pyramids Decussation of pyramids Motor nuclei: Cardiac - CAC CIC Medullary rhythmicity - respirations Vasomotor - blood vessel diameter Sensory nuclei inferior olivary nu - proprioception gracile nu - touch, pressure, vibration cuneate nu - same Cranial nerves VIII* - XII Pons: Ascending and descending tracts Middle cerebellar peduncles (MCP) - pons to cerebellum Nuclei: Pneumotaxic - respiration Apneustic " Cranial nerves V VIII* Midbrain:...
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Brain-3 - Brain Development: Primary vesicles Secondary...

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