Download - Nervous System & Synapses
Learning to Learn
The Human Brain & Thinking
100,000,000,000 neurons!
Stimulus from the outside world
Changed into an electrochemical signal by the sensory neuron affected
Signal travels through peripheral nervous system (PNS)
Signal reaches the central nervous system (CNS) – protected by the spine
Signal travels up the CNS and into the brain
Signal reaches the brain, where it will be processed
Signal travels via interneurons through the brain to reach the specific neurons that will process and respond
Signal reaches the cell body of the relevant neuron
Signal travels down the axon to the synaptic gap
The signal will need to jump across the gap between the two synapses
Signal triggers a chemical reaction in the presynaptic terminal
Chemical signal travels across synaptic gap
Chemical signal is received and travels along dendrite to the next neuron’s cell body
Processed information triggers an electrochemical reaction. It will travel the reverse route from CNS to motor neurons in the PNS which will activate the body’s response