BIOB34H3 Lecture Notes - Arachnoid Mater, Dura Mater, Tentorium Cerebelli
Document Summary
Chapter 13/14: major parts of the brain. The brain and cranial nerves: two cerebral hemispheres. Brain stem: midbrain, pons, medulla oblongata. Cerebellum: two cerebellar hemispheres, protection and coverings. Blood-brain barrier: brain capillary cells are joined by tight junctions, only things that can get through the lipid bilayer of capillary cells can pass easily (e. g. , o2, Co2), and some things are specially transported (glucose, amino acids: protects brain from harmful substances. Sulci are the grooves (deepest grooves called fissures) Epithalamus: pineal gland, part of endocrine system, produced melatonin, which helps regulate the biological clock. Pons: motor and sensory fiber tracts, middle cerebellar peduncles- carry info from cortex to cerebellum, nuclei for cranial nerves v, vi and vii, respiratory centers- smooth out inspirations and expirations. Reticular formation: an area of gray and white matter running through the core of the brain stem, motor and sensory functions, important in maintaining consciousness and overall alertness of cortex (reticular activating system, ras)
