PSYCH101 Lecture Notes - Lecture 3: Myelin

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16 Oct 2011
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NEUROPSYCHOLOGY
Lecture Outline
THE NEURON
Three Parts: Soma, Dendrites, Axon
Three Kinds: Sensory, Motor, Interneurons
NEURONAL CONDUCTION
The Electrical Component
The Chemical Component
After Transmission
NEUROTRANSMITTERS
Examples of Neurotransmitters
Neurotransmitters and Addiction
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Lecture Notes
Psych is the software of the brain
This lecture is the hardware
In order to be functional (P x E -> person interacting with the environment) you
have to get the world inside our brain
Afferent -> incoming direction
o Sensation makes this possible (vision, audition, etc.)
Once material is in nervous system, interpretation occurs
o PERCEPTION -> putting meaning to it
Central nervous system constantly bringin in and interpreting infor
o Occurs in the brain
Axons travel in bundles: NERVES
Three Kinds of Neurons
Info comes into neuron via dendrites, processed by soma, info sent out through axon
Optic nerve -> takes in visuals, sends to brain to process
o Everything has this kind of relationship
Motor also deals with hormones
Direction
From
(dendrite)
To
(axon)
Quantity
Sensory Neurons
Afferent
Sensory Organs
CNS
2 - 3 million
Motor
Neurons
Efferent
CNS
Muscles and Glands
2 - 3 million
Interneurons
Neuron
Neuron
10 - 100
billion
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