LEC 3

Question 1

The Simon effect protocol

Answer 1

People are faster when stimulus and response locations match up.

(e.g. study with coloured stimuli appearing in different locations

Question 2

Electroencephalography (EEG)

Answer 2

Electrical currents that travel to scalp surface measure with electrodes on scalp

• odd numbers on lefts side and even on right side (positions of EEG electrodes)

Question 3

Event related potentials (ERP)

Answer 3

electrical changes in EEG associated (time locked) with an event such as you choosing a response (cognitive, motor event, etc.)

Question 4

How do you extract ERP (event related potential)

Answer 4

You look at the EEG following a stimulus, then repeat stimulus a couple times. You take the EEG’s and average them out to get rid of the random noise and extract the ERP.

Question 5

Lateral Readiness potential (LRP)

Answer 5

Reflects the motor preparation process (brain prep before movement occurs), measured from EEG activity.

Question 6

Contingent Negative Variation (CNV)

Answer 6

Build up of anticipation for upcoming event. Appears as negative electrical shift in EEG (EEG start to climb negatively).

Question 7

Movement-related potential (MRP)

Answer 7

Is an ERP that reflects brains prep for voluntary movement. (doesn’t occur in involuntary twitches).

• starts in middle brain area

-Is bilateral in brain (both sides), then becomes larger in the side that will control mvmnt (LRP)

Question 8

How is ElectroEncephalography able to be tracked

Answer 8

put on electrode head-ware to measure the electric currents that travel to scalp

Question 9

what does tracking Electroence….. (EEG) tell us?

Answer 9

EEG changes are time locked and correspond to sensory, motor, or cognitive processes. Can show what part of brain does what, and how long it takes.

Question 10

Contingent negative variation

Answer 10

electric sign of expectancy in the human brain

Question 11

readiness potential (RP)

Answer 11

elec signal occur before we consciously decide to move.

Question 12

Lateral readiness potential (LRP)

Answer 12

because L and R motor sides cross in brain, LRP is larger in side of brain that will control action, the difference between them will determine which side of body reacts.

Question 13

premotoric vs motoric processing

Answer 13

Premotoric - Processing before movement (include stim ID, response selection, motor programming)

Motoric - planning to execute movement (but still premotor meaning that have not started moving yet

Question 14

Is Motoric processing before or during movement execution

Answer 14

before - it falls within premotor time.