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Lecture 4

PSYC 2330 Lecture Notes - Lecture 4: Flashlight, Kazoo, Motor Neuron


Department
Psychology
Course Code
PSYC 2330
Professor
Francesco Leri
Lecture
4

Page:
of 10
habituation: response goes down
sensitization: response goes up
habituation
regular basis:
- outside in the cold, don’t feel it anymore,
- traffic noise
- turn lights up,
- heat and pressure of shoes: get used to it
this is learning because your response changes
drugs: tolerance
video: sensitization
- kazoo- dog became more and more responsive to the annoying kazoo. got more and
more sensitive to it
- people talking behind you in lecture, tapping your chair. Gets more and more annoying
until you want to punch them
exposed to stimulus over and over until your response changes
lion may get habituated to you petting it, but not habituated to not biting your arm off.
sensitization and habituation are very basic forms of learning.
Kandel did studies on slugs.
Aplysia slugs: has a very simple nervous system
the nervous system is capable of learning
displays sensitization
processing cells in brain are neurons
neurons always look like this
axon attaches to other cells.
synaptic cleft
Neurotransmitters (nt) cross the synaptic cleft. chemical communication
vesicles have nt in them
action potential comes down, activates calcium
channels
calcium helps the docking of the vesicles. need
calcium to release nt.
(exocytosis)
Ca needs to be at the presynaptic terminal to
release
calcium is regulated by things in the cell- including action potential
channel is responsive to the environment and learning
gill- breathe, delicate
slugs will protect it
poke them, withdrawal the gill
if keep poking, the withdrawal will be less- habituation. doesn’t redraw the gill anymore
or ver slowly