lec 1a anatomy of the nervous systempages.ucsd.edu/~johnson/cogs17/17w20lec1aneuroanatslides.pdfcns...
TRANSCRIPT
![Page 1: LEC 1A ANATOMY OF THE NERVOUS SYSTEMpages.ucsd.edu/~johnson/COGS17/17W20Lec1aNeuroanatSlides.pdfCNS & PNS CNS Central Nervous System = Brain & Spinal Cord Surrounded by bone and meninges](https://reader033.vdocument.in/reader033/viewer/2022060321/5f0d3fff7e708231d43969a7/html5/thumbnails/1.jpg)
LEC1A
ANATOMYOFTHENERVOUSSYSTEM
Cogs17*UCSD
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Consciousness–"TheHardProblem"
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Mid-SaggittalSection
Tegmentum
&
Mid-brain
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PlanerViewsoftheBrain
Coronal
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PlanerViewsoftheBrain
Coronal
Horizontal
Saggital
Coronalplane
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Lateral&Medial
Lateral
Medial
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Dorsal&Ventral
InHumans,"Dorsal"=TOPofBrain&REARofSpinalCord
"Ventral"=BOTTOMofBrain&FRONTofSpinalCord
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BilateralStructureNervousSystemduplicatedonright&left
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Ipsi-lateral(sameside)andContra-lateral(oppositeside)Connections
Ipsi-lateralconnections
Contra-lateralconnections
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SupportStructures:TheMeningesSurroundsCNSunderbone
P A D
SpacefilledwithCerebralSpinalFluid=shockabsorber
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Ventricles
Produce,andfilledwith,CerebralSpinalFluid(CSF)
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Hydrocephalus
IfCSFdoesnotdrainproperly,canbuildupinVentricles
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BloodVesselsinBrain
Brain=2%ofbodyweight,uses20%ofbloodsupply!
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Blood-BrainBarrierExercisingtightcontrolsoverwhatenters
brainfrombloodstream
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Blood-BrainBarrierExercisingtightcontrolsoverwhatenters
brainfrombloodstream
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CNS&PNS
CNSCentralNervousSystem
=Brain&SpinalCord
Surroundedbyboneandmeninges
PNSPeripheralNervousSystem
SOMATICSystem=Interactionw/externalenv.
AUTONOMICSystem=Regulatesinternalenv.
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Mid-SaggitalSectionincluding....HINDBRAIN
Medullaoblongada Cerebellum
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Brainstem
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HINDBRAIN:Medulla
Medullaoblongada- Primalreflexes
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HINDBRAIN:Pons
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CranialNerves
MostCranialNervesalsoenter/exitMedulla&Pons
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HINDBRAIN:Cerebellum
MotorProgramsw/realtimesensorycoordination
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HINDBRAIN:Cerebellum
MNEMONIC:
Sarah the ballerinahas a hell of a cerebellum!
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MIDBRAIN
SuperiorColliculus(VisualMotion)
InferiorColliculus(AuditoryMotion)
TECTUM
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MIDBRAIN
MotorPathways&some
CranialNerves
TEGMENTUM
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MIDBRAIN
MIDBRAINMNEMONIC:
Tectumtodetect’em,Tegmentum
formomentum
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Diencephalon ofForebrain:THALAMUS
Projectsto/ReceivesfromSensory,Motor&Arousalsystems
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Diencephalon ofForebrain:
Hypothalamus
Neuro-Endrocrine(Brain+Hormone)
System
Oversees4Fs+Temp+Clock
CommunicatestoPITUITARYGLAND(the"master"gland)
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Telencephalon:AllotherForebrainStructures
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LimbicSystem- Motivation
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LimbicSystem- Motivation
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LimbicSystem- MotivationCINGULATEGYRUS
+/- EvaluatorA"Re-Entrant"System
OLFACTORYBULB- Smell
AMYGDALA- Emotion
HIPPOCAMPUS- Memory
...andMORE!
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BasalGanglion
OrganizingactivityintoTASKS
AnotherRE-ENTRANT
System
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BasalGanglion
ParkinsonsDisease:Compromisedconnections
fromTegmentumtoBasalGanglia>>Motordeficits
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BasalForebrain
ACh arousesCortex
GABA de-arousesCortex
ReceivesfromRaphe/ReticularArousalSysteminBrainstem