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human 0923

Ref_PSD

task

rest

no sub

EEG & PSD

FFT

0-35

PSD 0-100

PSD

0-35

FFT

0-100

tri1_trace

avg_trace

denoise

Monkey

+short

Small PSD value except 50 Hz in human, maybe due to more stable baseline and further location in ref channle

data 0919

data 0926

rest

task

Monkey

+short

+shield

rest

task

epo_raw

rest start

task without LFP

Monkey

+long

+shield

del_trial

task

with

LFP

rest end

Human

+long

+shield

Strong PSD value in low frequency(<5Hz) decreased after delete trials which monkey moved heavily

Monkey movement determines the quality of data.

No message from launch devices separately.

Conclusion:

1. compare 1&2 => 50 Hz noise --

2. compare 2&3 => smaller power in short line with same trend

Quality control:

1. PSD trend, remains same across condition except 50 Hz

2. Amplitude range: monkey: short+shield~50 < long+sheild~90 < short~180; human~35

3. SSVEP: hard to distinguish by raw trace

suggestions

1. Data process with trial inspection

2. Control the movement of monkey especially in the resting state (fake fixation point?).

3. Use channels with shorter wires and reapply the last exp.

4. Find a solution with isolated ref channel in monkey EEG exp.

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