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central nervous system (neuron (Effector (Response (ex. Sweating)), Motor…
central nervous system
3 layers of meninges
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pia mater
thin, delicate inner membrane of the meninges
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CNS function
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motor
Complex muscle-and-nerve acts that produce movement (walking, writing, typing running etc.)
sensory
end of peripheral neurons monitor conditions( light,sound,temperature)
lobes
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parietal
Touch, pressure, temperature, pain
frontal
Controls your logic, decision making, concentration, and personality
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occipital
Touch, pressure, temperature, pain
4 main parts of brain
cerebellum
Coordinates voluntary movements such as posture, balance, coordination, and speech, resulting in smooth, balanced muscular activity
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cerebrum
"Brain" area divided into Right and left hemispheres, connected by the Corpus Callosum
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2 hemispheres
Right Cerebral
Hemisphere
Controls left body, Creative, Visual, facial recognition, visual, and musical traits
Left Cerebral Hemisphere
Controls Right Body. Logical, Math, Calculations, Organized traits
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cranial nerves
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motor
Oculomotor
Movement of the eyeball, construction of the pupil (motor)
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neuron
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Motor Functions
Complex muscle-and-nerve acts that produce movement (walking, writing, typing running etc.)
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electrochemical
A nerve impulse is partially electric (change in polarity/charge) and partially chemical (neurotransmitters)
synapse
Where the nerve impulse is sent (connection of 2 neurons)Action Potential changes the charge of the synapse (causes electricity) and Neurotransmitters are sent.
Myelin Sheath
a phospholipid that electrically insulates neurons from one another. Speeds up nerve impulses. The covering of Schwann cells in the PNS and formed by oligodendrocytes in CNS
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axon
the extension of a neuron, ending in branching terminal fibers, through which messages pass to other neurons or to muscles or glands
dendrite
a short branched extension of a nerve cell, along which impulses received from other cells at synapses are transmitted to the cell body.
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multipolar neuron
A neuron with a single axon and multiple dendrites; the most common type of neuron in the nervous system.
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neuroglia
CNS
Microglia
Act as phagocytes, eating damaged cells and bacteria, act as the brains immune system
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nerve physiology
response types
summation
increased force of contraction by a skeletal muscle fiber when a twitch occurs before the previous twitch relaxes
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reflex
a simple, automatic response to a sensory stimulus
reflex arc
A relatively direct connection between a sensory neuron and a motor neuron that allows an extremely rapid response to a stimulus, often without conscious brain involvement.
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association neurons
Also called interneurons, located only in the brain or spinal cord, these neurons contact sensory neurons to motor neurons; the switch board of the nervous system.
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Proprioceptors
Sensory receptors, located in the muscles and joints, that provide information about body position and movement.
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brain drugs
Hallucinogens
psychedelic drugs, such as LSD, that distort perceptions and evoke sensory images in the absence of sensory input
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GHB and Rohypnol
central nervous system depressants that are often connected with drug-facilitated sexual assault, rape, and robbery
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Marijuana
a drug, often smoked, whose effects include euphoria, impairment of judgment and concentration and occasionally hallucinations; rarely reported as addictive
cocaine
a powerful and addictive stimulant, derived from the coca plant, producing temporarily increased alertness and euphoria
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Methamphetamine
a powerfully addictive drug that stimulates the central nervous system, with speeded-up body functions and associated energy and mood changes; over time, appears to reduce baseline dopamine levels
alcohol
Factor affecting an individual's likelihood of committing crime. If a person is under the influence of these substances, they are more likely to commit crime due to clouded judgement or impeded sense of danger.
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