PSYA01H3 Chapter Notes - Chapter 3: Mirror Neuron, Sensory Neuron, Parietal Lobe

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12 Aug 2016
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The synapse is the junction between the dendrites of one neuron and the axon or cell body of another. Notice that neurons
do not actually touch one another: There is a small synaptic space between them across which information is transmitted.
Major types of neurons
3 major types:
1. Sensory neurons – Receive information from external world and convey this information to the brain via the
spinal cord
oHave specialized endings on their dendrites that receive signals for light, touch, taste and smell
oEg. In our eyes, sensory neuron’s endings are sensitive to light
2. Motor neurons – Carry signals from the spinal cord to the muscles to produce movement
oHave long axons that can stretch to muscles at our extremities
3. Interneurons – connects sensory neurons, motor neurons, or other interneurons
oMost of the nervous system consists of this kind of neurons
oSome carry information from sensory neurons into the nervous system
oOthers carry information to motor neurons
oOthers perform a variety of information-processing functions within the nervous system
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