nervous system nervous system coordinates all activities in the body by transmitting messages back...
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NERVOUS NERVOUS SYSTEM SYSTEM
Coordinates all activities in the body Coordinates all activities in the body by transmitting messages back and by transmitting messages back and forth to every cell of the body through forth to every cell of the body through nerves.nerves.
Central Nervous SystemCentral Nervous System
Brain and Spinal CordBrain and Spinal Cord
Receives messages from the PNS Receives messages from the PNS (everything outside of brain and (everything outside of brain and spinal cord) and sends a response or spinal cord) and sends a response or reactionreaction
Tells the body how to respond to a stimulusTells the body how to respond to a stimulus
Spinal CordSpinal Cord
About 18 +/- inchesAbout 18 +/- inches
Sends messages from brain Sends messages from brain to body and visa versato body and visa versa
BrainBrain
Controls activities of the nervous systemControls activities of the nervous system
Allows you to think, reason, coordinate, Allows you to think, reason, coordinate, learn, remember, perform all bodily learn, remember, perform all bodily functions whether voluntary or involuntaryfunctions whether voluntary or involuntary
CerebrumCerebrum
LARGEST, most complex part of brainLARGEST, most complex part of brainControls conscious thought, learning, & Controls conscious thought, learning, &
memorymemoryRight side controls the left side of the bodyRight side controls the left side of the bodyLeft side controls the right side of the bodyLeft side controls the right side of the body
Cerebrum LobesCerebrum Lobes
Frontal LobeFrontal Lobe
Parietal LobeParietal Lobe
Occipital LobeOccipital Lobe
Temporal LobeTemporal Lobe
Frontal LobeFrontal Lobe
Voluntary movementVoluntary movement
Use of languageUse of language
IntellectIntellect
PersonalityPersonality
Parietal LobeParietal Lobe
Sensory InformationSensory Information
HeatHeatColdColdPainPainTouchTouchKinesthetics—where your body is and what it is Kinesthetics—where your body is and what it is
doingdoing
Temporal LobeTemporal Lobe
HearingHearingSmellSmellSome memorySome memorySome thoughtSome thoughtSome judgementSome judgement
CerebellumCerebellum
Coordinates movement of the skeletal Coordinates movement of the skeletal musclesmuscles
PosturePosture
BalanceBalance
Brain StemBrain Stem
3-inch stalk of nerve cells and fibers that 3-inch stalk of nerve cells and fibers that connect the brain to the spinal cordconnect the brain to the spinal cord
The “Gateway” from the brain to the body The “Gateway” from the brain to the body and the body to the brainand the body to the brain
Brain Stem PartsBrain Stem Parts
Medulla oblongataMedulla oblongata
PonsPons
MidbrainMidbrain
ThalamusThalamus
HypothalamusHypothalamus
Medulla OblongataMedulla Oblongata
The lowest portion of the brain stemThe lowest portion of the brain stem
Regulates heart rateRegulates heart rate
Regulates breathing rateRegulates breathing rate
Regulates hearing, talking, and swallowingRegulates hearing, talking, and swallowing
Regulates reflexes such as:Regulates reflexes such as: CoughingCoughing SneezingSneezing VomitingVomiting
PonsPons
Sits just above the M.O.Sits just above the M.O.
Connects nerve impulses Connects nerve impulses to other parts of the to other parts of the brainbrain
Helps breathingHelps breathing
Controls muscles of the eyes and faceControls muscles of the eyes and face
MidbrainMidbrain
Highest portion of the brain stemHighest portion of the brain stem
Involved in controlling eyeball movement Involved in controlling eyeball movement and pupil sizeand pupil size
HypothalamusHypothalamus
Controls various body processesControls various body processes
TemperatureTemperatureAppetiteAppetiteSleepSleep
Through the pituitary gland it controls Through the pituitary gland it controls metabolism, sexual development, and metabolism, sexual development, and emotionemotion
Peripheral Nervous System (PNS)Peripheral Nervous System (PNS) Nerves outside of the brain and spinal cordNerves outside of the brain and spinal cord
Sends info from inside and outside of your Sends info from inside and outside of your body to the CNS for the brain to respond tobody to the CNS for the brain to respond to
PNS PartsPNS Parts
Autonomic Nervous SystemAutonomic Nervous System
Somatic Nervous SystemSomatic Nervous System
Autonomic Nervous SystemAutonomic Nervous System
Controls Involuntary functionsControls Involuntary functionsSympathetic—Reflex—”Fight or Flight”Sympathetic—Reflex—”Fight or Flight”
Parasympathetic—opposes actions of the Parasympathetic—opposes actions of the sympathetic nervous system by slowing bodily sympathetic nervous system by slowing bodily functions during restfunctions during rest
Somatic Nervous SystemSomatic Nervous System
Relays messages from the eyes, ears, Relays messages from the eyes, ears, nose, tongue, and skin to the CNS which nose, tongue, and skin to the CNS which sends a response to the skeletal muscles sends a response to the skeletal muscles to move or react to a situationto move or react to a situation
NeuronsNeurons
Nerve cellsNerve cells
Cell body—contains the control Cell body—contains the control center of the nerve cell—nucleuscenter of the nerve cell—nucleus
Dendrites—branched structures that extend from Dendrites—branched structures that extend from the cell body. They receive info from other the cell body. They receive info from other neurons or sensory receptors and transmit neurons or sensory receptors and transmit impulses toward the cell bodyimpulses toward the cell body
Axons—transmit messages away from the cell Axons—transmit messages away from the cell body and toward other neurons, cells, or glandsbody and toward other neurons, cells, or glands
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