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human 0923
Ref_PSD
task
rest
no sub
FFT
0-35
PSD 0-100
PSD
0-35
FFT
0-100
tri1_trace
avg_trace
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.