The nervous system
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Transcript of The nervous system
The nervous system
"What is "real"? How do you define "real"?"
Morpheus
Epistemological views
• Realist: mind independent object.
• Idealist: mind dependent object.
Neuron
• Receive information.
• Integrate information.
• Conduct signal.
• Transmit signal.
Kinds of neurons
• Sensory: respond to stimulus.
• Association: receive signals for many sources.
• Motor: activate muscles or glands.
• Effectors: muscles or glands perform the response.
Neurotransmitter
• Chemical that change the inner negative polarity of the neuron.
• Iniates the nerve impulse.
• Acetycoline, norephinephrine: activates cardiac muscle cells.
Central Nervous System (CNS)
• Receives and processes information.
• Brain.
• Spinal cord.
Brain
• Receives and processes sensory information.
• Initiates responses.• Stores memories.• Generates thoughts and emotions.• Left hemisphere: right, language and
math.• Right hemisphere: left, spatial perception,
music, creativity.
Spinal cord
• Conducts signals to and from the brain.
• Controls reflex activities.
Peripheral Nervous System
• Transmits signals between the CNS and the rest of the body.
• Somatic Nervous System
• Autonomic Nervous System
Somatic Nervous System
• Controls voluntary movements by activating skeletal muscles.
Autonomic Nervous System
• Controls involuntary responses by influencing organs, glands, and smooth tissue.
• Sympathetic division: stressful activity.
• Parasympathetic division: maintanance activities.
