    x = loadspike(['chronicExcBlock_pre-2.spk']);
    channel = [y.channel; x.channel];
    time = [y.time; y.time(size(y.time,1))+x.time];
    threshold = [y.threshold; x.threshold];
    waveform = [y.waveform x.waveform];
    
    save('chronicExcBlock_predrug','channel','time','threshold','waveform');
    
    clearvars -except spkdat
    x1 = find(spkdat.time < 9000*0);
    x2 = find(spkdat.time < 9000*1);
    ind = x2(length(x1)+1:length(x2));
    
    channel = spkdat.channel(ind);
    time = spkdat.time(ind);
    threshold = spkdat.threshold(ind);
    waveform = spkdat.waveform(:,ind);
    save('chronicExcBlock_predrug_0to150min','channel','time','threshold','waveform');
    