Functions of the Nervous System Master control and communication system of the body Master control...
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Functions of the Nervous SystemFunctions of the Nervous System
Master control and communication system Master control and communication system of the body of the body
Uses electrical signals to communicateUses electrical signals to communicate2 subdivisions:2 subdivisions:
Central Nervous System (CNS)- brain & Central Nervous System (CNS)- brain & spinal cordspinal cord
Peripheral Nervous System (PNS)- nervesPeripheral Nervous System (PNS)- nerves
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Functions of the Nervous SystemFunctions of the Nervous System
Sensory receptorSensory receptor senses stimuli ---- senses stimuli ---- sends message to sends message to integration centerintegration center ---- ---- motor outputmotor output signals a response signals a response
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Knee Jerk ReflexKnee Jerk Reflex
ReflexReflex- rapid, automatic response - rapid, automatic response
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Neuron StructureNeuron Structure
DendritesDendrites- receive - receive signalssignals
Cell BodyCell Body-- Brain of Brain of neuronneuron
AxonsAxons- Carries signals - Carries signals away from cell bodyaway from cell body
MyelinMyelin- Insulation on - Insulation on axonaxon
Nodes of RanvierNodes of Ranvier- - Signal “jumps” along Signal “jumps” along thesethese
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Multiple SclerosisMultiple Sclerosis
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Types of NeuronsTypes of Neurons
Sensory NeuronSensory Neuron- send info- send info InterneuronInterneuron- produce a response- produce a responseMotor NeuronMotor Neuron- brings response to body - brings response to body
cellscells
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Divisions of the PNSDivisions of the PNS
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phSuccessnet.comphSuccessnet.com
Online activities 28.1, 28.2, 28.3Online activities 28.1, 28.2, 28.3Turn in to bin when done.Turn in to bin when done.
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Animation of Brain Development
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Brain DevelopmentBrain Development
Neural tube– around the 4Neural tube– around the 4thth week of week of developmentdevelopmentAnterior part develops into brainAnterior part develops into brainRest becomes spinal cordRest becomes spinal cordVentricles form in the center (holes that hold Ventricles form in the center (holes that hold
CSF)CSF)Grows to ~3 lbsGrows to ~3 lbs
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Brain TestsBrain Tests
Count every " F" in the following text: Count every " F" in the following text:
FINISHED FILES ARE THE RE FINISHED FILES ARE THE RE SULT OF YEARS OF SCIENTI SULT OF YEARS OF SCIENTI FIC STUDY COMBINED WITH FIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS... THE EXPERIENCE OF YEARS...
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O lny srmat poelpe can raed tihs.O lny srmat poelpe can raed tihs.
cdnuolt blveiee taht I cluod aulaclty uesdnatnrd cdnuolt blveiee taht I cluod aulaclty uesdnatnrd waht I was rdanieg. The waht I was rdanieg. The phaonmneal pweor of the hmuan mnid, aoccdrnig to phaonmneal pweor of the hmuan mnid, aoccdrnig to a rscheearch at Cmabrigde Uinervtisy, a rscheearch at Cmabrigde Uinervtisy,
it deosn't mttaer in waht oredr the ltteers in a wrod it deosn't mttaer in waht oredr the ltteers in a wrod are, the olny iprmoatnt tihng is taht the frist and lsat are, the olny iprmoatnt tihng is taht the frist and lsat ltteer be in the rghit pclae. The rset can be a taotl ltteer be in the rghit pclae. The rset can be a taotl mses and you can sitll raed it wouthit a porbelm. mses and you can sitll raed it wouthit a porbelm.
Tihs is bcuseae the huamn mnid deos not raed ervey Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe. Amzanig lteter by istlef, but the wrod as a wlohe. Amzanig huh? And I awlyas tghuhot slpeling was ipmorant!huh? And I awlyas tghuhot slpeling was ipmorant!
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Regions of the BrainRegions of the Brain
CerebrumCerebrumDiencephalonDiencephalonBrain StemBrain StemCerebellumCerebellum
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I. CerebrumI. Cerebrum
Left sideLeft side: problem solving, logistical : problem solving, logistical thinking (controls right side)thinking (controls right side)
Right sideRight side: creative thoughts & imagination : creative thoughts & imagination (controls left side)(controls left side)
Corpus Callosum-Corpus Callosum- Connects 2 sides Connects 2 sides
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4 Lobes of Cerebrum4 Lobes of Cerebrum
ParietalParietal- touch, taste- touch, taste FrontalFrontal- decision - decision
making, problem making, problem solving, planning, solving, planning, movement, speech movement, speech
Temporal- Temporal- memory, memory, hearing, emotions, hearing, emotions, smellsmell
Occipital- Occipital- sightsight
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MemoryMemory
HippocampusHippocampusAmygdalaAmygdala
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II. DiencephalonII. Diencephalon
““inner brain”inner brain”Thalamus- Enhances or blocks signalsThalamus- Enhances or blocks signalsHypothalamus- temp regulation, blood Hypothalamus- temp regulation, blood
pressure, hunger, thirst, sex drivepressure, hunger, thirst, sex drive
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III. Brain StemIII. Brain Stem
3” long, diameter of thumb3” long, diameter of thumbSleep, breathing, body movementSleep, breathing, body movement
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IV. CerebellumIV. Cerebellum
Balance, equilibrium, skeletal muscle Balance, equilibrium, skeletal muscle activityactivity
Damage= ATAXIA (clumsy & Damage= ATAXIA (clumsy & disorganized)disorganized)