*The Nervous System* By: *Jasmine Wright* Donte Nelson.
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Transcript of *The Nervous System* By: *Jasmine Wright* Donte Nelson.
*The Nervous System*
By: *Jasmine Wright* Donte Nelson
*Importance*
•Major controlling, regulatory, & communicating system in the body•Center of all mental activity•Thought •Learning •Memory
•Sensory input-eyes see something•Hands touch warm surface•Send messages straight to your brain•Integration-interpretation of things you have felt, tasted, and touched with your sensory cells•Motor output•Brain sends a message through neurons to effecter cells, muscle or gland cells
Functions
The nervous system is composed of both central (brain & spinal) and Peripheral components, with the latter having both somatic & autonomic (Parasympathetic & Sympathetic) subdivisions
*Components of The Nervous System*
Anatomy & Physiology
Neurons-structural units of the
nervous system•Conduct messages in
the form of nerve impulses from one part of the body to another
•Extreme longevity•Amitotic
•High metabolic rate
Neurotransmitter-language of the nervous
system•Neuron communicates with
others to process & send messages to the rest of the
body•Sleep
•Thought•Rage
•Hunger•Memory
•Movement•Smile reflect the doings of these versatile molecules
Different Types of Nervous System *Different types of The
Nervous System*
Central Nervous System•Brain & Spinal Cord•Control Center
Peripheral Nervous System•Cranial nerves & spinal Nerves• Communication between the CNS & rest of body
ANS•Involuntary•Controls cardiac & smooth muscles & glands
SNS•Voluntary•Controls skeletal muscles
Sympathetic•Mobilizes body systems•Fight/Flight
Parasympathetic•Functions during rest•Rest/Digest
Term Definition Cause Effect
Bell’s Palsy Form of neuritis that involves paralysis of the facial nerve
Unknown (recovery may occur spontaneously
Weakness of the muscles of one side of the face
Cerebral Palsy Nonprogressive disorder of movement
Attributed to damage to the brain
Lack of balance, and intelligence, posture & speech
Motor Neuron Disease
Progressive degenerative disease of the motor system occurring in middle age
Some are inherited Affects the cells of the anterior horn of the spinal cord, the motor nuclei in the brainstem, & the corticospinal fibers
Sciatica Common condition arising from compression of, or damage to a nerve or nerve root
Degeneration of an intervertebral disc
Pain in back & outer side of the thigh, leg, & foot
Parkinson’s Disease
Degenerative disease process (associated with aging)
Associated with a deficiency of the neurotransmitter dopamine
Tremor-affects one hand
Diseases /Disorders
Effects of Drugs & Alcohol
*Most Widely Used Stimulants*•Caffeine•Nicotine-Nicotine binds to a subset of acetylcholine (ACh) receptors. ACh is a neurotransmitter at synapses early in the pathways of sympathetic stimulation. Although a weak drug in one sense, nicotine is strongly addictive. The use of chewing gum and skin patches containing nicotine is designed to satisfy the craving for nicotine while avoiding the serious health effects of other ingredients in cigarette smoke.
•Amphetamines•Cocaine-•Amphetamines and cocaine bind to — thus blocking — transporters used for the reuptake of dopamine (and noradrenalin) into presynaptic neurons. This causes the level of dopamine to rise in the synapses. High levels of dopamine in an area of the brain called the nucleus acumens appear to mediate the pleasurable effects associated with these (as well as other) psychoactive drugs.
Effects Of Drugs & Alcohol
•Alcohol's primary target is the central nervous system (CNS), where it influences neurotransmission to produce intoxication.•Difficulty walking•Blurred vision•Slurred speech•Slowed reaction times•Impaired memory•AFFECTS THE BRAIN!!!
•http://pennhealth.com/health_info/animationplayer/brain.html•http://kidshealth.org/parent/general/body_basics/brain_nervous_system.html •http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookNERV.html •http://www.innerbody.com/image/nervov.html •http://www.animationlibrary.com/c/6/Science_and_Body/