classical conditioning- lecture 1 Flashcards
what is long term potentiation
where synapses become more powerful
what is the unconditioned stimulus
food electric shock (periorbital shock)
what is the unconditioned response
salivation
nictitating membrane
what is the conditioned stimulus
bell
noise
conditioned response
salivation
movement of the nictitating membrane.
typically similar to the UR.
why study eyeblink conditioning
simple response easy to study, nictitating membrane has no voluntary control, but can be classically conditioned.
100 trials a day of nictitating eye blink
day 1: response to US only
Day 3- evidence of eyelid movement before US arrives
day 5- cr clear to see the eyelid closes in anticipation of the US
what is delay conditioning
the US comes on before the CS stops and overlaps.
what is trace conditioning
gap between the auditory stimulus and US- more complex than delay conditioning
definition of classical conditioning
the CR does not affect the CS. otherwise it would be a form of avoidance learning.
where was the first place researchers looked and why
The hippocampus
patient HM.
Does damage to the hippocampus stop eyeblink conditioning
NO=
Weiskrantz and Warrington (1979) examined patients with anterograde amnesia- clear evidence of learning - no conscious awareness.
types of long term memory
conscious memory: declarative.
semantic, episodic, and procedural.
Thompson (1983)- cerebral cortex and hippocampus
delay NMR conditioning still possible in rabbits lacking either hippocampus or cerebral cortex. also possible in decerebrate animals. (separated).
This led them to research the cerebellum.
Electrophysiological recording of the cerebellum
McCormick and Thompson (1984)- when paired the units in the brain increase responding.
- recording from the deep cerebellar nuclei
