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The Central Nervous System (Brain ( major parts) (Brain stem (Medulla…
The Central Nervous System
Nervous system
Integrative Function
analyze sensory information stored some aspects
makes decisions regarding appropriate bahavior
Motor Function
respond ro stimuli by initiaying muscle
Sensory Function
detects changes within the body
outside of the body
stimulation
Brain ( major parts)
Diecephalon
superior to the brain stem surrounds the cerebrum
Hypothalmus
controles regulation eating and drinking
controls body tempature
emotion and behavior
day and night cycle
Thalamus
surrounds the 3 ventricle
relay station for sensory impulse of cerebral
plays a role in our emotions, memory and awareness
limbic system
emotional aspect of behavior and aids the memory
pitutary gland
hangs down anterior potion of the hypothalamus
Brain stem
Medulla oblongata
lowest part of the brainstem and containing control centers for the heart and lungs.
pons
connects to the spinal cord with brain and links parts nerve fibers within the CNS
midbrain
small central part of the brainstem
develops primitive or embryonic brain
Cerebrum
largest portion of the brain
corpus callosum
connects both hemispheres
Longitudinal fissure
separates brain into the right and left cerebral hemispheres
cerebrum
is divided into lobes
frontal-forhead
temporal-above
Cerebral cortex
dark outer area consist of gray matter;contain cell bodies 75% of all neurons in the nervouse system
cerebellum
little brain
vermiss
a narrow worm shaped structure on both sides of the cerebrum
gyri
convolutions (bumps)
Sulci (sulcus)
grooves
fissures
deeper groves
Neurons
Function classification
Multipolar
several dendrites and one axon
unipolar
one process and always sensory neurons axons terminals
Bipolar
one main dendrite and one axon
nerve tissue are made of neurons and neurglia
made of cell bodies - contains nucleus and other organeles, dendrites receving portions,,short tapered and branches
Axon and collaterials
Name of the Lobes
4 major lobs
Parietal lobe
the top of the head
reception and correlation of sensory information
occipital lobe
the lower back of the head
visual processing center
it what helps you see
Frontal Lobe
lying behind the forehead
frontales
Its function is regulates behavior
for example the way to think, act and learn
its your personality
temporal lobe
beneath the temples
sides of the head
behind the ears
involved in vision, memory, sensory input, language, emotion
layers of Meninges
Pia mater
beneath the dura mater
protect the central nervous system
containing the cerebrospinal fluid
Dura mater
top glossy layers of protection of the brain
top of the pia mater
dense, irregular C.T with many blood vessels and nerves
Arachoid mater
attached to the inside of the dura mater
surrounds the brain and spinal cord
goes down the folds of the brain
longitudinal fissure
Drugs
marijuana
smoke
relaxes or speed energy
increases appetite
marijuana plant
impairs memory
steriods
by injection
male sex hormones
hormones
cause heart attack. strokes and liver problem
acne or hair loss
man made
Cocaine
snorting, injection or smoking
come from a coca plant
speeds up the brain
powerful stimulant
increases energy, decreases appetite and mental alertness
heart rhythm, nausea, respiratory failure , stroke and seizures,
Alcohol
drinking
ethylalchol
depressent
produces calming or drowsy affects
loss of motor coordination, reasoning, balance and speech
potential actions
nerve impulse in tranverse during actions potrntial , strong enougj stimulation or nerve impulse the creats NA+ gates to open
rushes into cells causing depolaration