Neuroplasticity

Question 1

Learning

Answer 1

Process by which experiences change the nervous system

Changes referred to as memories

Question 2

Hebb Rule/ Hebb Synapse

Answer 2

Connection between 2 neurons takes place only if both neurons are firing at the same time

Question 3

Synaptic Enhancement

Answer 3

After affect of pre synaptic action potential increases the amount of neurotransmitter released by successive action potentials

Question 4

Post Tetanic Potentiation

Answer 4

Potentiation following a sustained, high frequency burst of action potential

Question 5

Short Term Synaptic Enhancement

Answer 5

Triggered by buildup of intracellular calcium inside pre synaptic terminal during action potential activity

Question 6

Long Term Potentiation

Answer 6

Long term changes in synaptic strength
Heterosynaptic- specific to which neurons are activated at the same time

Associative

Question 7

NMDA Receptors

Answer 7

Calcium ion channel usually blocked by Mg

To turn on NMDA receptor, 2 events must happen at the same time (binds glutamate, removal of Mg)

Presynaptic neuron releases glutamate, Mg removed when post synaptic neurone is depolarized (EPSP)

Question 8

NMDA Receptors and LTP

Answer 8

Open NMDA receptor channels allow calcium influx, which trigger LTP

Question 9

Functions of Calcium

Answer 9

Activates nitrous oxide, diffuses to pre synaptic terminal, changes ability of pre synaptic terminal to release glutamate (will release more glutamate in the future)

Increases number and sensitivity of AMPA receptors (glutamate receptors)

Changes size of synapse (bigger- more surface area)