Plasticity

Question 1

Synaptic plasticity

Answer 1

adaptability/changeability of neural connections where existing synapses can be strengthened or weakened
New synapses can be created
Existing synapses can be shrinked or removed

Question 2

Long-term potentiation

Answer 2

Strengthening of neurons as action at one synapse is repeatedly accompanied by an action potential at the post synaptic neuron
Post synaptic neuron is more sensitive to the neurotransmitter released from presynaptic neuron and more likely to reach the threshold for activation
Rate law - increasing the liekligood of a post-synaptic potential allows the neural sigal to be transmitted more quickly
Important in learning
Refers to either the hebb rule or hebbiam learning in recognition of donal hebbs - neurons that fire together wire together

Question 3

Long-term depression

Answer 3

Weakening of synaptic connections
Decrease in the sensitivity of post-synaptic neuron to neurotransmitter released by the pre-synaptic neuron and as a result becomes less likely to fire in response
Lack of stimulation of neural networks lead to the fading of memories

Question 4

Neurogenesis

Answer 4

generation of neurons
Restricted to the hippocampus and the olfactory bulb

Question 5

Brain rehabilitation

Answer 5

• Damaged brain tissue cannot be replaced as neurogenesis does not occur in all brain regions and can cause individuals to experience sustained impairment related to damaged area
• LTP and LTD allows increasing connection in other healthy brain reigons to account for damaged area

Question 6

3 component of emotional response

Answer 6

1. Behavioural
   Appropriate muscular changes
   Principle of antithesis: response in doing the opposite
2. Autonomic
   Physiological changes induced by the autonomic nervous system to facilitate behavioural responses
3. Hormonal
   Hormones can help reinforce autonomic changes
   E.g adrenal grand screting adrenaline to increase blood flow to approriate muscle and nutrients stored in muscle to converted into glucose

Question 7

Intergration and emotional responses

Answer 7

An emotional response in one situation may not be appropriate in another and instead impact cognitive and behavioural performance
Emotional reposes can help integrate incoming sensory signals and coordinate appropriate regulation of the brain and body
Emotions modifies a person’s experience and behaviour so it is more appropriate for the context