1. Common ERPs
BCS204 Week 5.2
2/13/2019

2. Exercise
For each of the electrodes below, identify: 1) whether it’s on the left or right hemisphere; and 2.) its location by the letter code
CP2
TP9 O1
FT2
FC4 FZ

3. ERP components
Exogenous sensory components: obligatory neural responses to sensory input
Endogenous: entirely task-dependent
Motor: responses related

4. Common ERPs P1: 100-130 ms poststimulus
Largest on the lateral occipital sites
Modulated by selective attention and arousal level

5. Common ERPs Visual N1: 100-150 ms poststimulus
Largest on the anterior sites
Amplitude modulated by prior exposure to another stimulus: If X occurs at location A, then when Y occurs again at location A will reduce the N1

6. Common ERPs P2: ~200 ms poststimulus
Largest on the anterior and central sites
Amplitude modulated by target frequency (as in P3)

7. Common ERPs
N170: face recognition
Luck (2004)

8. Common ERPs Auditory responses Auditory brainstem responses (ABR)
Midlatency responses (MLR)
Long-latency responses (LLR)

9. Common ERPs Auditory N1 ~75 ms poststimulus Frontal and central sites
Sensitive to attention

10. Common ERPs
N2: evaluation of global stimulus quality; perceptual mismatch

11. Common ERPs
P3 or P300: detection of rare stimuli; also associated with cognitive demand
Luck (2004)

12. Common ERPs
N400: detection of semantic anomaly
Luck (2004)

13. Common ERPs P600: detection of syntactic anomaly
Osterhout & Holcomb (1993)

14. Common ERPs
Mismatch Negativity (MMN): ms; max at fronto-central sites detection of change
Luck (2004)

15. Other brain rhythms
Alpha wave: ~10Hz, from occipital lobe