Transcript Nervous System - Hemlock Public School District

Explain and discuss what the nervous system
 Discuss the functions and diseases/problems the
nervous system can bring
 Show and explain a model of the system
 Questions for us from the class
 quiz/worksheet
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The nervous system is a collection of
nerves and specialized cells known as
neurons that send signals between
different parts of the body
Body’s essential wiring
 Bundles of fibers start
at the brain and central
chord and branch out to
every part of the body
 Contains two parts:
central and peripheral
 Made up of neurons and
glial cells
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Encased in bone and controls the
sensory and helps with responding
 Consists of spinal chord and brain which
lies in cerebrospinal fluid (a colorless
fluid produced in the brain)
 Has two types of tissues which are gray
matter and white matter
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› Gray matter: nerve cell bodies, dendrites,
and axons
› White matter: axons which cause it to be
white
Consists of sensory neurons and motor
neurons
 Sensory neurons tells the central nervous
system about stimuli; has 12 pairs of
cranial nerves and 31 pairs of spinal
nerves
 Motor neurons take action and are
connected to the central nervous system
that goes to the muscles and gland
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Sensory neurons and motor neurons run
from the middle of the central nervous
system and some organs such as the
heart, lungs ,viscera, and glands
 Monitors the internal environment and
the motor neurons controls the
contraction of smooth muscle and
cardiac muscle
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Medulla : part of the brain that controls
heart beat and breathing rate.
Cerebellum : part of the brain that controls
balance and body motion.
Cerebrum : large part of the brain that
controls the senses and thinking
Axon: Fiber that carries messages away
from the nerve cell
Dendrite: fiber that carries messages from
other neurons to the nerve cell body
Neuron: nerve cell
 Relay Neurons: sensory neurons or motor
neurons that carry messages
 Brain: controls all functions of the body.
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› Located in the skull.
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Spinal cord: sends messages from the
brain to the parts of the body.
› Located in your back.
Seeing
 Hearing
 Taste
 Touch
 Smell
 Video at the end
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Cerebrovascular accident (CVA) (stroke
resulting in the brain losing oxygen
which can cause loss of vision or
speech)
 Aphasia (involves any traumatic injury to
the left side of your brain resulting in
speech loss)
 Epilepsy (a Greek word for seizure, and
this only occurs for certain seizures
lasting a long time and are more severe)
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Aphasia
Multiple Sclerosis (is in the central
nervous system and is multiple
degenerations of the insulating layer of
the nerve fibers)
 Transient Ischemic Attack (TIA) (a loss of
blood flow in the brain for a short period
of time)
 Alzheimer's disease
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› Affects the memory, thinking,
And behavior
TIA
Brain scan (placing a radioactive
substance in the blood can image possible
features like tumors)
 Lumbar (spinal) puncture or tap (LP)
(injecting a needle in your lower spinal
column which then allows you to sample
fluids surrounding the brain and spinal
chord)
 Electroencephalography (EEG) (images the
brains electrical activity)
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Computed tomography (CT) (x-ray
machine taking multiple images with a
better resolution than a normal x-ray
does)
 Magnetic Resonance Imaging (MRI)
(shows a high resolution of soft tissue and
does not involve an x-ray)
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Permanent brain damage can be caused by a
lack of oxygen in the brain within 5 to 10 minutes.
Until your late 40’s, your brain keeps developing.
New brain connections are created every time you
form a memory.
20% of your oxygen and blood in your body is used
by your brain.
By the time you wake up, your brain has enough
energy to power a small light bulb.
There are taste receptions in your brain.
The pathologist who performed Einstein’s autopsy
kept his brain in a jar for 20 years.
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Your brain is composed of 60% fat.
Scientists say that when you diet, your brain
eats itself.
The human brain has the same consistency as
tofu.
Sponges have no nervous system.
The nervous system can transmit signals at 100
meters per second.
Neurons and glial cells make up the nervous
system.
There are millions of nerve cells in your body.
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http://www.youtube.com/watch?v=jl0vU
6j6Www
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"Quizlet." ALL Nervous System terms! flashcards. N.p., n.d. Web. 10
Mar. 2014. <http://quizlet.com/673149/all-nervous-system-termsflash-cards/>.
"mad funny vid of Nervous System." YouTube. YouTube, 2 June
2008. Web. 10 Mar. 2014.
<http://www.youtube.com/watch?v=jl0vU6j6Www>.
"Nervous System Diseases - Des Moines University." Des Moines
University Nervous System Diseases
Comments. N.p., n.d.
Web. 02 Mar. 2014.
"22 facts.com." 22Facts.com. N.p., n.d. Web. 10 Mar. 2014.
<http://www.22facts.com/nervous-system/>.
"Brain Facts: 13 Facts about Brain you didn't know â†
F•ACTSlidesâ†
’."
Brain Facts: 13 Facts about Brain you didn't know â†
F•ACTSlidesâ†
.’
N.p., n.d. Web. 10 Mar. 2014. <http://www.factslides.com/sBrain>.
"Nervous System Diseases - Des Moines University." Des Moines
University Nervous System Diseases
Comments. N.p., n.d.
Web. 02 Mar. 2014.