ERP 3

Question 1

What is latency?

Answer 1

When ERP components occur, ms since stimulus onset to peak

Question 2

What is “parallel distribution” - manner of info processing?

Answer 2

Informations goes through multiple structures at the same time but have different processing (Mesulam)

Question 3

What is the sensory info processing pathway?

Answer 3

Receptors -> Thalamus -> Primary sensory cx -> secondary sensory cx -> Association cx

Question 4

What ERP activity occurs pre and post voluntary movement?

Answer 4

Pre: Readiness potential= slow neg wav 1 sec prior to movement (800-1000ms before action there is neural change)
Post: Large positive complex

Question 5

What did Shibasaki et al conclude from finger flexions and extensions study?

Answer 5

Identified 4 pre and 4 post motion components.
Last post- +300ms maximal in motor cx on app side to movement
Major pre= readiness potential, major post= N1/P2, P300

Question 6

What happened when they examined active vs passive (string pull) movement?

Answer 6

Passive= no pre-motion components (confirming they’re related to prep for voluntary movement)
Post was also different- maybe due to kinaesthesia (sense that detects bodily position/movement)

Question 7

What did Dchin & Lindsley conclude from their light flash stimuli study on ERP’s and RTs?

Answer 7

Larger amplitude P3 was associated with faster reaction time (press button at stimulus) -> Relationship between speed of motor response and P3