according 2 Donald Hebb

Question 1

what years did he live between

Answer 1

1904-85

Question 2

cell assembly =

Answer 2

set of connected neurons

Question 3

each psychologically significant event is the result of a particular pattern of activity in a group of interconnected neurons (cell assembly) . how does thus happen

Answer 3

start off w simple cell assembly
→ event triggers Some of cells in assembly 2 fire
→ these firing cells then trigger other cells in the assembly to fire

Question 4

how does short-term memory (10-20s) work according 2 Hebb

Answer 4

certain proportion of cells after the event has subsided will b sufficiently activated 2 drive recurrent activity amongst themselves

Question 5

according 2 Hebb, what do u need 4 long-term memory to work

Answer 5

need 2 have some kind of mechanism that strengthens connections between assembly cells, but doesn’t require reverberating activity (which short-term uses)
–>
so, u want 2 strengthen connectivity between subset of cells:
synapses get stronger →
potential 4 increased activity in future

Question 6

so how does recall frm long-term memory work?

Answer 6

trigger
→ neuron gets activated, then due 2 stronger synapses that activity ticks over 2 other neurons in that subset
→ pattern of activity reproduced w ease (reactivation)

Question 7

how does synaptic strengthening occur?

Answer 7

cells need 2 b repeatedly active @ the same time . presynaptic + postsynaptic cells have 2 be rapidly firing together