L19 - Synaptic Plasticity

Question 1

What are the two types of memory

Answer 1

Implicit or procedural memory

Explicit or declarative memory

Question 2

What are the things that make up declarative memory

Answer 2

Semantic such as facts

Procedural such as events

Question 3

How do we learn, what is learning?

Answer 3

Learning is the response of the brain to environmental changes and involves adaptive changes in synaptic connectivity which in turn alter behaviour

Question 4

Can you explain the diagram of where a circle is presented to the neurons as stimulus and why partial parts of the circle can still trigger the neurons

Answer 4

Activation of the cell assembly by stimulus
Reverberating activity continues activation after the stimulus is removed
Hebbian modification strengthen the reciprocal connections between neurons that are active at the same time
The strength and connections mean even partial activation leads to complete activation

Question 5

What is Hebb’s rule ?

Answer 5

When an axon a, is near enough to excite a cell be, and repeatedly takes part in firing it there is a growth process/metabolic changed such A’s efficiency increases

Question 6

what are the two rules of synaptic modification?

Answer 6

One. Neurons that fire together wired together

Two. Neurons that fire out of sync lose the link