Nik Murphy

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Questions related from Nik Murphy

What is the best device for presenting white noise signals to a participant during TMS-EEG?

I'm trying to come up with a method for presenting white noise signals to a participant during TMS-EEG without using a laptop. If you have experience with this what devices do you use? Or should I...

14 February 2020 585 4 View

How to estimate power for instantaneous frequency?

Hi all, I'm currently trying to apply the methods in http://www.sciencedirect.com/science/article/pii/S0165027011002172 to my own research. I have no problem estimating the hilbert spectrum but...

16 March 2017 1,752 0 View

Does anybody else have problems loading neuromag data with Fieldtrip?

I'm currently designing a pipeline for the pre-processing of MEG data in Fieldtrip but keep on having some issues with events. Having compared the data loaded in with that loaded in using...

19 December 2016 9,673 6 View

How best to improve the resolution of gamma estimation in human EEG?

I'm currently faced with analysing some working memory data collected using an EGI system (129 channels), however, the dataset has previously been described as being difficult to accurately...

23 November 2016 3,998 3 View

Best methods for MEG in SPM12?

Hi , I've recently made the shift to MEG analysis and am looking for some tutorials to get started with SPM12 (I was planning to use this to do pre-processing and then switch into pure fieldtrip...

13 October 2016 1,329 2 View

What is the current consensus on retina vs cortex for the generation of phosphenes in man?

I was having a discussion about the nature of phosphenes and it was proposed that the generation of these light like percepts could be an effect of the tms pulse being conducted down the retinal...

20 July 2015 1,836 2 View

How can I optimise EMD for use in ERP ?

Hi all, I've recently been using EMD as part of a pre-processing step but seem to have hit a bit of a problem. Generally the decomposition runs fine and the signals yield some very nice results....

26 May 2015 4,786 2 View

Is it possible to use non-parametric permutations for an f-test in event related potential research?

Was wondering if it is possible to run a non-parametric permutation test (preferably cluster corrected) for an anova design. I'm currently trying to find the best method for deriving the...

12 November 2014 4,922 3 View

Does anyone have experience reading .cnt and .trg files into FieldTrip?

I'm currently having problems attempting to use FieldTrip for the pre-processing of TMS-EEG data. Until recently I've been using the ANT EEPimport functions and then transforming the data using...

09 October 2013 8,400 1 View