Lecture 7

Question 1

Action Potential

Answer 1

Resting Potential: -70 milivolts

• Sodium rushes into membrane, increasing positive charge
• Potassium rushes out decreasing positive charge
• Neuron resets itself

Question 2

Neurotransmitters

Answer 2

Acetycholine- Neuromuscular junction
Dopamine- Reward, attention
Seratonin- Pleasure, calm
Norepinephrine- Attention, Alertness,

Question 3

SSRI ( Seratonin Reuptake inhibitor)

Answer 3

Usually neurotransmitters are immeadiately taken back up into the pre-synaptic terminal for next action potential
Prevents reuptake so post synaptic terminal is constantly taking in seratonin

Question 4

Local vs Distributed Representation

Answer 4

Local: One idea represented by one unit alone

Distributed- one idea activated multiple interconnected units

Question 5

Neural Computation

Answer 5

Nerun aggregates signal from multiple different inputs

Changes its firing rate accordingly

Question 6

Hebbian Learning

Answer 6

Neurons that fire together, wire together

Neurons that continue to fire together strengthen the synapse between them

Question 7

Lateral Inhibition

Answer 7

Turn on own input, turn down neighboring input

Neighboring neurons interfere and inhibit neurons next to them

Question 8

Opponent Processing

Answer 8

Two opposite stimuli come from one cell
Signal for one perceptive quality excites one output, signal fro complementary quality inhibits the output
level of output determines perceived quality

Question 9

Lateral + Opponent Processing

Answer 9

Simultaneous Color Contrast

Seeing two colors together affect the way we perceive them

Question 10

Habituation

Answer 10

Neurons that fire a lot over a long period of time slow their firing
Show A for long time
Show neutral(A=B)
Neutral looks like B because A is unable to inhibit B

Question 11

Feature Detectors

Answer 11

The way we perceive stimuli, like movements, shape, and angles, requires specialized cells in the brain called feature detectors