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Flashcards in Major EEG Components Deck (36)
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1

2 major auditory components:

N1, MMN

2

2 major P3 components:

P3a, P3b

3

3 Lateralized ERP Components:

PCN (N2PC), CDA (SPCN), LRP

4

Visual C1 largest over:

Visual C1 originates from:

Largest over posterior midline

Originates from primary visual cortex (V1)

5

Visual C1 sensitive to:

Perceptual parameters (stimulus contrast & spatial frequency)

6

Visual C1:

Upper part codes ____ visual field, and lower part codes ____ visual field

Upper part codes LOWER visual field, and lower part codes UPPER visual field

7

3 important visual components:

C1, P1, N1

8

ONLY component with BOTH visual and auditory forms:

N1

9

Visual P1 largest at:


Visual P1 originates from:

Largest at lateral occipital electrode sites


Originates from dorstral extrastriate cortex (early P1) and ventral fusiform gyrus (later P1)

10

Visual P1 sensitive to:

Spatial attention and feature attention--largest when stimulus is spatially attended

11

Luminance dot change paradigm demonstrates which component?

Visual P1-- wave enlarged when probe presented in the attended color

(P1 associated with spatial & feature attention)

12

Which components both have 3 sub-components?

Visual N1 & Auditory N1

13

Later portions of Visual N1 originate from:

1) Parietal cortex and 2) lateral occipital cortex

14

Which Visual N1 sub-components are anterior and posterior?

Anterior N1 = earlier portion

Posterior N1s (2) = later portion

15

Visual N1 sensitive to:

Task demands, subjects' processing speed capacity, previous sensory modality, and spatial attention

Associated with discriminating stimuli and cross-trial modality changes

16

Auditory N1 sub-components and their origins:

1) Fronto-central (auditory cortex)
2) Vertex maximal potential (unknown)
3) Laterally distributed (superior temporal gyrus)

17

Auditory N1 sensitive to:

Auditory N1 reflects:

Sensitive to attention, stimulus predictability, sound repetitions, and sensory refractoriness (larger ISIs=larger N1s)

Reflects sensory processing onset & detection process

18

Which auditory component is suppressed with self-intiated sounds, relative to external initiated sounds?

Auditory N1

19

Auditory: MMN is largest at:

Mismatch negativity (MMN) largest at central midline

20

Auditory MMN sensitive to:

rule violations (grammar in mother tongue)

thought to reflect automatic process comparing stimuli to memory (elicited without attention/tasks)

21

P3 Family sensitive to:

Sensitive to target probability (unpredictable stimuli in a task)--independent of sensory modality

22

P3a also called:

P3a is distributed in which area:

"Novelty P3" - fronto-central maximum

Frontally distributed

23

P3b also called:

P3b is distributed in which area:

"Classic P3" - parietal maximum

Parietally distributed

24

Which components does the oddball paradigm relate to?

P3 Family:
-P3a = infrequently occurring distractors
-P3b = infrequently presented target among frequent stimuli

25

PCN originates in:

PCN strongest over:

Posterior Contralateral Negativity (PCN) originates in ventral occipito-temporal cortex

Strongest over visual areas contralateral to an attended stimulus location

26

PCN could reflect:

Could reflect attentional selection, interference from distractors, also saliency of target and numerosity

27

PCN stands for:

Posterior Contralateral Negativity

28

CDA stands for

Contralateral Delay Activity

29

CDA is ____(+/-) over parietal, occipital, and temporal sites contralateral to attended hemifield

CDA is NEGATIVE over parietal, occipital, and temporal sites contralateral to an attended hemifield

30

CDA sensitive to:

CDA sensitive to amount of currently stored WM info

(increases with # of stored objects)