PowerPoint PresentationSlide 2Slide 3Slide 4Slide 5Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11Slide 12Slide 13Slide 14Slide 15Slide 16Slide 17Slide 18Slide 19Slide 20Slide 2118-1Prosencephalon(forebrain)Mesencephal on(midbrain)Rhombencephalon(hindbrain)Brain Origin and Development18-2Cerebrum=Telencephalon18-3Motor areas: control voluntary muscle movementPrimary motor cortexPrecentral gyrus of frontal lobeAxons of neurons in precentral gyrus project to spinal cord in pyramidal tracts18-4Sensory areasPrimary somatosensory cortexPostcentral gyrus of parietal lobeReceive and interpret input from skin receptors and muscle stretch receptors18-5Motor and Somatosensory Homunculus18-6Sensory Function of Insula and Medial Surface of Temporal LobeParietalFrontalOccipitalPrimary auditoryPrimary gustatoryPrimary olfactoryLateral side oftemporallobe18-7prefrontal cortexcomplex intellect, learning, judgment, personality…Wernicke's area and involved in interpretation and of languageBroca's areacoordination of speech Lateralziation-functional area only on one hemisphere18-8Diencephalon Functiongray matter surrounding 3rd ventricleimportant regulatory center, multiple nucleiThalamusHypothalamusEpithalamus18-9Thalamus: gateway to cortex except for olfactionException=olfaction18-10Epithalamus (dorsal diencephalon)pineal gland: melatonin, circadian rhythmsHypothalamus (ventral diencephalon)Chief exectuive of autonomic nervous systemPituitary GlandHypothalamus nucleiRegulate:Autonomic ResponseSex driveClock (sense of time)HungerThirstTemperaturePituitary gland18-11Brain Stem shown in green between the purple dienchaphalon and the yellow spinal cordThalamusMidbrainPonsMedulla OblongataCerebral PeduncleCerebellar Peduncle18-12Cerebellum Function18-13Ventricles: central fluid-filled cavitiesfilled with cerebrospinal fluid (CSF)and lined by ependymal cellsEach ventricle has a choroid plexus18-14Protection of Brainneurons are fragile and irreplaceableskull protects, soft tissues cushionMeninges: partitioning CT membranes protect CNS18-15Vision18-16 Retina~Three cell layers thickLight waves or photons18-17Ganglion cell axons cluster together to leave retina at optic disk and form optic nerve18-18Hearingauricle, external acoustic meatus, tympanic membrane,18-19Middle ear-Air filled cavity behind eardrums18-20Cochlea: fluid filled spiral cavity within which A fluid filled duct resides18-21Organ of