Prof. Greg Francis 1/6/20 PSY 200: Intro. to Cognitive Psychology 1 Purdue University Neurons and neurotransmitters PSY 200 Greg Francis Lecture 05 Why does (nearly) everyone love Prozac? Purdue University Neurons ● The brain cells that are responsible for cognition are neurons Purdue University Input / output ● Electrical signal w Established by the relative amount of charged ions inside versus outside the cell membrane ● Inputs change the resting potential of the cell ● Output identifies when the cell potential has increased a lot electrode -70 millivolts resting level K+ K+ NA+ NA+ Purdue University Input at dendrites ● Changes the cell membrane potential w which causes further changes in the cells chemistry w which causes further changes in the membrane potential ● Strong enough input crosses a threshold and the cell fires w action potential http://www.mind.ilstu.edu/curriculum/neurons_intro/action_potential_1.0.swf Purdue University A neuron ● An action potential generated at the soma travels down the axon to the terminals Purdue University A neuron ● The action potential then affects the membranes of other cellsdendrites
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Neurons - psych.purdue.edugfrancis/Classes/PSY200/L05.pdf · Interact with neurotransmitters in lots of ways, for example wReplace: accepted by receptor and with similar effect wProduction:
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Prof. Greg Francis 1/6/20
PSY 200: Intro. to Cognitive Psychology 1
Purdue University
Neurons and neurotransmitters
PSY 200
Greg Francis
Lecture 05
Why does (nearly) everyone love Prozac?
Purdue University
Neurons● The brain cells that are responsible for cognition
are neurons
Purdue University
Input / output
● Electrical signalw Established by the
relative amount of charged ions inside versus outside the cell membrane
● Inputs change the resting potential of the cell
● Output identifies when the cell potential has increased a lot
electrode-70 millivoltsresting level
K+K+
NA+
NA+
Purdue University
Input at dendrites● Changes the cell membrane
potentialw which causes further
changes in the cell�s chemistry
w which causes further changes in the membrane potential
● Strong enough input crosses a threshold and the cell firesw action potential