Mem and Emo (3) Flashcards
(15 cards)
What is synaptic plasticity?
Neurons that fire together, wire together
Stage one of long term potentiation?
A synapse is repeatedly stimulated
Stage two of long term potentiation?
More dendritic receptors form
Stage three of long term potentiation?
More neurotransmitters are released per transmission
Stage four of long term potentiation?
A stronger link between neurons forms
What is non associative LTP?
the stimulation of a single pathway at high intensity leads to an increased response to subsequent stimulation of the same pathway
What is associative LTP?
coincidental activation of two fibres converging on a single post-synaptic neuron. As long as one of these fires at a high frequency, both synapses will be potentiated
What is long term depression?
Low-frequency stimulation results in subsequent decreased response to test stimulation
Example of long term depression?
Decrease in activity of inhibitory neurones, increases final output
What is post tetanic potentiation?
increased frequency of miniature excitatory postsynaptic potentials or currents
What is presynaptic inhibition?
Where a modulatory cell inhibits the ability of a presynaptic cell to produce a EPSP in a post Synaptic cell
What is presynaptic facilitation?
Where a modulatory cell increases the ability of a presynaptic cell to produce a EPSP in a post Synaptic cell
What receptor type is necessary for long term potentiation?
NMDA receptors
What brain area does long term potentiation generally occur in?
Hippocampus
When Synaptic strength increases in memory what is a long term change that occurs in neurones?
Insertion of additional AMPA receptors
