lOMoAR cPSD| 48433225
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, lOMoAR cPSD| 48433225
Study Notes:
PYC1501 - Basic Psychology
Human Nervous System
Impulse Conduction in the Neuron
• Neurons → Neural networks → Nervous system
• All human behaviour
Stimuli → sensory organs → electrochemical energy → Neurons →
impulse conduction → Neurons
• External stimuli → sensory organs → internal stimuli → brain
2 Main processes of impulse conduction:
1) Electrical - impulse 1st segment of axon → terminals electrical
events at cell membrane
2) Chemical - passage of impulse neuron to next chemical process in
synaptic cleft
1) Neuron is electrically charged
Potential difference - difference between
positive and negative charge Ions - positive,
negative parts
Neural membrane - Barrier splits charge - barrier bridged charge forms
neutral particles
• Fluid inside, outside of neuron - chemical particles eclectically charged
• Neuron electrically charged potential difference inside, out
2) Restingmembrane potential
• Impulse conducted - charge across neural membrane changes.
Resting membrane potential - inactive readiness before impulse
conduction - (-) inside = (+) outside
• Ions move - high concentration to low + opposite charges attract, similar repel
Page 3 of 46
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Page 2 of 46
Downloaded by Vincent master ()
, lOMoAR cPSD| 48433225
Study Notes:
PYC1501 - Basic Psychology
Human Nervous System
Impulse Conduction in the Neuron
• Neurons → Neural networks → Nervous system
• All human behaviour
Stimuli → sensory organs → electrochemical energy → Neurons →
impulse conduction → Neurons
• External stimuli → sensory organs → internal stimuli → brain
2 Main processes of impulse conduction:
1) Electrical - impulse 1st segment of axon → terminals electrical
events at cell membrane
2) Chemical - passage of impulse neuron to next chemical process in
synaptic cleft
1) Neuron is electrically charged
Potential difference - difference between
positive and negative charge Ions - positive,
negative parts
Neural membrane - Barrier splits charge - barrier bridged charge forms
neutral particles
• Fluid inside, outside of neuron - chemical particles eclectically charged
• Neuron electrically charged potential difference inside, out
2) Restingmembrane potential
• Impulse conducted - charge across neural membrane changes.
Resting membrane potential - inactive readiness before impulse
conduction - (-) inside = (+) outside
• Ions move - high concentration to low + opposite charges attract, similar repel
Page 3 of 46
Downloaded by Vincent master
()
