The nervous system is Important because…

Coordinates the parts of the body and the organs the control body functions

The most important reason…

Well, have you ever touched a hot stove and immediately removed your hand without thinking about it?

That’s because your nerves send a message to you brain telling you to not do that again…Did you know that the neurological relay race happened quicker than you could read this?

Components of the Components of the Nervous SystemNervous System

–Central Brain

– Spinal Cord

–12 Cranial Nerves The Nervous System is the control center for movement, sleep, hunger, thirst, and every other vital activity necessary for survival.

Anatomy and physiologySpinal cord

Spinal cord is a long column of nervous tissue that acts as a

pathway for the transmission of information between the body and

the brain.

Has 31 segments, each control different movements of the body.

Anatomy and physiology

Brain

.

Center of how we feel, emotion, memory, thought, and speech.

-Cerebrum, large part of brain, divided into 2 halves.

-Cerebellum, located on the back of the skull. Controls complex movements, like walking, talking, and balance.

-Brain Stem, Connects brain to spinal cord. Controls involuntary actions and feelings like hunger, thirst, breathing, body temperature, and blood pressure.

The brain sits on your skull. It has 3 main

parts, Cerebellum, Cerebrum,

and the Brain stem

CNS

Central Nervous System

CerebelluCerebellumm

CerebrospinaCerebrospinall

CerebrumCerebrum

HypothalamusHypothalamus

Medulla Medulla OblongataOblongata

MeningeMeningess

Meninges Dura-Meninges Dura-MaterMater

Meninges Meninges Arachnoid MaterArachnoid Mater

Meninges Pia Meninges Pia MaterMater

Pons VaroliiPons Varolii

PNSPNSPeripheral Nervous Peripheral Nervous

SystemSystemConsists of the cranial nerves

and the spinal nerves. Connects the Central Nervous

system to the remainder of the body.

Sensory neurons transmit impluses to the CNS from sensory receptors.

SNSSNSSomatic Nervous Somatic Nervous

SystemSystem1. Gateway between the environment outside of

the body and the Central Nervous system.

2. SNS comprises 12 pairs of cranial nerves and 31 pairs of spinal nerves. Some pairs are only sensory and motor neurons while the rest are involved in smell, vision, hearing, and balance.

3. These neurons allow the transmission of signals of stimuli and responses.

The autonomic nervous system

(ANS) (or visceral nervous system) is the part of the peripheral nervous system

that acts

as a control system, m

aintaining homeostasis in the body. These activities are generally perform

ed without conscious

control. [1] The ANS affects heart rate, digestion, respiration rate, salivation, perspiration, diameter of the pupils, m

icturition

(urination), and sexual arousal.

Have you ever wanted to run away from something or are you the kind of person who fights back? Well, that is due to the Sympathetic system in your body. It is activated under stress. So, taking that hard math test effects your nervous system too!

What it does:regulates digestive secretionsslow the heartconstrict the pupils dilate blood vessels.

Alzheimer's Disease

•Degenerative brain disease

•Affects memory, thinking, and behavior.

•Changes your language, decision making ability, judgement, and other mental functions and

personality.

•Can be genetic. Anyone can be diagnosed with Alzheimer's, but the older you are your chances

are increased.

•Risk factors: High Blood Pressure, Head trauma, and having female gender.

Parkinson's DiseaseMost common form of

Parkinsonism, a group of motor system disorders.

•Slowly Progressive•Degenerative•Loss of Dopamine producing brain cells

Symptoms•Tremors-Arms, jaws, face, and legs•Stiffness of the body trunk•Slowness of movement•Impaired balance.

Michael J. Fox and Muhammed Ali both suffer from Parkinson’s Disease

Broca AphasiaAffects your speech

Doesn't allow you to talkYou can understand what words mean, but you wouldn't be able

to talk!If your lucky you may be able to write what you want to say, but not in the most severe cases!

Multiple Sclerosis

Affects women more than it does men!Onset of the disease is during the ages of 20 to

40. Makes it hard to walk, pick things up, and also

to function in everyday life.

Tourette Syndrome

Begins in childhood and gets worse the older you get!

Tics-irregular movement of head, neck, and shoulders

Snorting, Sniffing, Involuntary vocalization

Effects of AlcoholEffects of Alcohol•Alcohol can lead to

alcoholism which can trigger severe

depression.

•100,000 Americans die each year from

alcohol related accidents.

•Parental drinking boosts the

possibility of teen drinking.

Effects of Drugs•Spontaneous heart

rate

•Amphetamines block transporters causing dopamine to in the

synapses

•High levels of dopamine cause

pleasurable effects

•Suppressed appetite and rapid weight loss

Commonly used drugs

•Muscle Jerks

•Drowsiness

•Pupil Dilation

•Increased Body temperature

Websites

•Encarta.msn.com/encyclopedia

•www.ivyrose.co.uk/topics/partsofthecentralnervoussystem

•www.healthline.com/gate-content/peripheralnervoussytem

•Reeve.uci.edu/anatomy/snsphp

•http://www.healthline.com/sw/cs-anatomy-of-the-brain

•www.ask.com

•www.revolution.health.com

•http://ajpheart.physiology.org