Intro to Psych, Module 4

Intro to Psych, Module 4 - T he Brain Module 4 Overview o...

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The Brain: Module 4 Overview o Neural Communication Neurons How neurons transmit information Influence of neurotransmitters o Nervous System Central Nervous System (CNS) Peripheral Nervous System (PNS) o Endocrine System Hormones Influence of hormones o Basic brain structures o How we study the brain Neurons o Neurons are the basic building blocks of the brain. The brain is made up of billions of neurons. o Animals and humans have similar brain function and anatomy. But humans have the largest brains, relative to body size. Neuronal Structure o Main parts: Dendrites Body Axon Myelin The Action Potential o A neural impulse. A brief electrical charge that travels down an axon and is generated by the movement of positively charged atoms in and out of channels in the axon’s membrane Inhibition/Excitation
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o Neurons have a threshold of excitation. That is the minimum change in membrane potential needed to start an action potential.
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