Memory Flashcards
what is Procedural memory?
skills and associations that are unavailable to conscious mind.
what is Declarative memory?
memories available to conscious mind - can be encoded in symbols and language.
what is Implicit memory?
memory that cannot be consciously recalled.
what are different types of Implicit memories?
Procedural memory,
Classical Conditioning,
priming.
what is Explicit memory?
memory that can be consciously recalled.
temporal lobe and memory:
what happens when we electrically stimulate this area?
perceive hallucinations,
recollections of past experiences.
how is the Prefrontal Cortex related to memory?
area for working memory.
how is the Hippocampus related to memory?
essential for converting short to long term memory,
area for declarative memory.
how is Amygdala related to memory?
processing sensory inputs - implicit / emotional / learnt fear.
how is the Cerebellum related to memory?
area for procedural memory,
area for sensorimotor processing.
how do we know the Hippocampus is related to memory?
lesions here cause memory loss,
the hippocampus is larger in people who need to memorise lots of spatial information.
what is the Hebbian synapse concept?
a junction between neurons that is strengthened when it successfully fires the postsynaptic cell.
what does the use of / facilitation of a synapse cause?
the strengthening of that connection - synaptic plasticity.
what is long term potentiation?
it is related to increase in excitatory post synaptic potential (EPSP) after high intensity stimulation of presynaptic neuron.
what is long term depression?
amplitude of the excitatory post synaptic potential in hippocampus decreases after some stimuli.
what is the normal response to touching a snail’s siphon?
slightly withdrawing the gill.
what is the reflex to touching the siphon with an electrical shock?
withdraw it almost completely.
what happens when the snail becomes sensitised to these stimulations?
when touching the siphon normally it withdraws in the same way it did to the electric shock.
what is it called when the gentle stimulation to siphon causes reduced withdrawal?
habituation.
what happens when pairing siphon touch and electric shock repeatedly?
causes long term, non-habituating reflex.
what do long term potentiation / depression and the siphon reflex (aplysia) require?
they require receptor activation.
