User Tutorial:Interpreting the Results - Revision history

Jfialkoff at 02:32, 19 January 2008

2008-01-19T02:32:24Z

← Older revision		Revision as of 02:32, 19 January 2008
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	[[Image:eeg1RightHandTopo.png\|600px]]		[[Image:eeg1RightHandTopo.png\|600px]]

			==Next Step==
			While EEGs are commonly used in BCI, there has also been considerable success using MEG and ECoG as well. If you would like to learn how to use ''BCI2000 Offline Analysis'' to analyze these types of data files, please see [[User Tutorial:Performing an Offline Analysis of ECoG Data]] and/or [[User Tutorial:Performing an Offline Analysis of MEG Data]].

			==See also==
			[[User Tutorial:Obtaining Mu Rhythm Parameters in an Initial Session]]

			[[Category:Tutorial]]

Jfialkoff at 01:15, 19 January 2008

2008-01-19T01:15:21Z

← Older revision		Revision as of 01:15, 19 January 2008
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	In [[User Tutorial:Performing an Offline Analysis of EEG Data]], we used ''BCI2000 Offline Analysis'' to generate a feature plot, topographies and spectra for the eeg1 sample ~~data~~ comprising the data files <tt>eeg1_1.dat</tt>, <tt>eeg1_2.dat</tt> and <tt>eeg1_3.dat</tt>. In this continuation of the tutorial, we'll compare our results from [[User Tutorial:Performing an Offline Analysis of EEG Data]] to analyses of other data from the same subject.		In [[User Tutorial:Performing an Offline Analysis of EEG Data]], we used ''BCI2000 Offline Analysis'' to generate a feature plot, topographies and a spectra plot for the eeg1 sample dataset comprising the data files <tt>eeg1_1.dat</tt>, <tt>eeg1_2.dat</tt> and <tt>eeg1_3.dat</tt>. In this continuation of the tutorial, we'll compare our results from [[User Tutorial:Performing an Offline Analysis of EEG Data]] to analyses of other data from the same subject.

	==Imagined vs. Real==		==Imagined vs. Real==
	BCI experiments will typically consist of sessions where the subject is asked to perform a movement followed by sessions where the user is asked to imagine making that movement. Comparing these data can help us to understand the relationship between doing and imagining. The images that follow show the results from the eeg1 data that were derived in [[User Tutorial:~~...~~]] followed by the results of an analysis performed on a different set of data recorded from the same subject. In the latter recordings, the subject was asked to imagine moving his feet or hands rather than actually performing these movements.		BCI experiments will typically consist of sessions where the subject is asked to perform a movement followed by sessions where the user is asked to imagine making that movement. Comparing these data can help us to understand the relationship between doing and imagining. The images that follow show the results from the eeg1 data that were derived in [[User Tutorial:Performing an Offline Analysis of EEG Data]] followed by the results of an analysis performed on a different set of data recorded from the same subject. In the latter recordings, the subject was asked to imagine moving his feet or hands rather than actually performing these movements.

	'''Results for actual movement:'''		'''Results for actual movement:'''

Jfialkoff: /* Contralateral Response */

2008-01-10T16:29:41Z

Contralateral Response

← Older revision		Revision as of 16:29, 10 January 2008
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	==Contralateral Response==		==Contralateral Response==
	As we've seen, it's important to evaluate the physiological plausibility or a potential feature during the selection process. For instance, we would certainly want to question a response to foot movement that is centered over the frontal lobe. Additionally, we should expect the response of the motor cortex to a given action to be contralateral to that action. The following topography reflects a subjects response to movement of the right hand. Notice that the response is focused primarily over the left hemisphere.		As we've seen, it's important to evaluate the physiological plausibility of a potential feature during the selection process. For instance, we would certainly want to question a response to foot movement that is centered over the frontal lobe. Additionally, we should expect the response of the motor cortex to a given action to be contralateral to that action. The following topography reflects a subjects response to movement of the right hand. Notice that the response is focused primarily over the left hemisphere.

	[[Image:eeg1RightHandTopo.png\|600px]]		[[Image:eeg1RightHandTopo.png\|600px]]

Jfialkoff: /* Contralateral Response */

2008-01-10T16:28:20Z

Contralateral Response

← Older revision		Revision as of 16:28, 10 January 2008
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	As we've seen, it's important to evaluate the physiological plausibility or a potential feature during the selection process. For instance, we would certainly want to question a response to foot movement that is centered over the frontal lobe. Additionally, we should expect the response of the motor cortex to a given action to be contralateral to that action. The following topography reflects a subjects response to movement of the right hand. Notice that the response is focused primarily over the left hemisphere.		As we've seen, it's important to evaluate the physiological plausibility or a potential feature during the selection process. For instance, we would certainly want to question a response to foot movement that is centered over the frontal lobe. Additionally, we should expect the response of the motor cortex to a given action to be contralateral to that action. The following topography reflects a subjects response to movement of the right hand. Notice that the response is focused primarily over the left hemisphere.

	[[Image:eeg1RightHandTopo.png]]		[[Image:eeg1RightHandTopo.png\|600px]]

Jfialkoff: /* Center vs. Off-center Results */

2008-01-10T05:31:20Z

Center vs. Off-center Results

← Older revision		Revision as of 05:31, 10 January 2008
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	As we can see, the images above are remarkably similar. This is often the case for data related in this manner.		As we can see, the images above are remarkably similar. This is often the case for data related in this manner.

	==~~Center vs. Off-center Results~~==		==Contralateral Response==
			As we've seen, it's important to evaluate the physiological plausibility or a potential feature during the selection process. For instance, we would certainly want to question a response to foot movement that is centered over the frontal lobe. Additionally, we should expect the response of the motor cortex to a given action to be contralateral to that action. The following topography reflects a subjects response to movement of the right hand. Notice that the response is focused primarily over the left hemisphere.

			[[Image:eeg1RightHandTopo.png]]

Jfialkoff: /* Imagined vs. Real */

2008-01-10T05:00:53Z

Imagined vs. Real

← Older revision		Revision as of 05:00, 10 January 2008
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	BCI experiments will typically consist of sessions where the subject is asked to perform a movement followed by sessions where the user is asked to imagine making that movement. Comparing these data can help us to understand the relationship between doing and imagining. The images that follow show the results from the eeg1 data that were derived in [[User Tutorial:...]] followed by the results of an analysis performed on a different set of data recorded from the same subject. In the latter recordings, the subject was asked to imagine moving his feet or hands rather than actually performing these movements.		BCI experiments will typically consist of sessions where the subject is asked to perform a movement followed by sessions where the user is asked to imagine making that movement. Comparing these data can help us to understand the relationship between doing and imagining. The images that follow show the results from the eeg1 data that were derived in [[User Tutorial:...]] followed by the results of an analysis performed on a different set of data recorded from the same subject. In the latter recordings, the subject was asked to imagine moving his feet or hands rather than actually performing these movements.

	'''Results ~~from~~ actual movement:'''		'''Results for actual movement:'''

	[[Image:eeg1FeaturePlt.png\|600px]]		[[Image:eeg1FeaturePlt.png\|600px]]

	'''Results ~~from~~ imagined movement:'''		'''Results for imagined movement:'''

	[[Image:eeg1ImagFeature.png\|600px]]		[[Image:eeg1ImagFeature.png\|600px]]

	'''Results ~~from~~ actual movement:'''		'''Results for actual movement:'''

	[[Image:eeg1Spectra.png\|600px]]		[[Image:eeg1Spectra.png\|600px]]

	'''Results ~~from~~ imagined movement:'''		'''Results for imagined movement:'''

	[[Image:eeg1ImagSpectra.png\|600px]]		[[Image:eeg1ImagSpectra.png\|600px]]

	'''Results ~~from~~ actual movement:'''		'''Results for actual movement:'''

	[[Image:eeg1Topos.png\|600px]]		[[Image:eeg1Topos.png\|600px]]

	'''Results ~~from~~ imagined movement:'''		'''Results for imagined movement:'''

	[[Image:eeg1ImagTopos.png\|600px]]		[[Image:eeg1ImagTopos.png\|600px]]

	~~The~~ images above ~~show an incredible similarity~~ in ~~response to real and imagined movement~~.		As we can see, the images above are remarkably similar. This is often the case for data related in this manner.

	==Center vs. Off-center Results==		==Center vs. Off-center Results==

Jfialkoff: /* Imagined vs. Real */

2008-01-10T04:46:32Z

Imagined vs. Real

← Older revision		Revision as of 04:46, 10 January 2008
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	'''Results from actual movement:'''		'''Results from actual movement:'''

	[[Image:~~eeg1Feature~~.png\|600px]]		[[Image:eeg1FeaturePlt.png\|600px]]

	'''Results from imagined movement:'''		'''Results from imagined movement:'''

Jfialkoff: /* Imagined vs. Real */

2008-01-10T04:45:40Z

Imagined vs. Real

← Older revision		Revision as of 04:45, 10 January 2008
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	'''Results from actual movement:'''		'''Results from actual movement:'''

	[[Image:eeg1Feature.png\|600px]]		[[Image:eeg1Feature.png\|600px]]

	'''Results from imagined movement:'''		'''Results from imagined movement:'''

	[[Image:eeg1ImagFeature.png\|600px]]		[[Image:eeg1ImagFeature.png\|600px]]

	'''Results from actual movement:'''		'''Results from actual movement:'''

	[[Image:eeg1Spectra.png\|600px]]		[[Image:eeg1Spectra.png\|600px]]

	'''Results from imagined movement:'''		'''Results from imagined movement:'''

	[[Image:eeg1ImagSpectra.png\|600px]]		[[Image:eeg1ImagSpectra.png\|600px]]

	'''Results from actual movement:'''		'''Results from actual movement:'''

	[[Image:eeg1Topos.png\|600px]]		[[Image:eeg1Topos.png\|600px]]

	'''Results from imagined movement:'''		'''Results from imagined movement:'''

	[[Image:eeg1ImagTopos.png\|600px]]		[[Image:eeg1ImagTopos.png\|600px]]

Jfialkoff: /* Imagined vs. Real */

2008-01-10T04:45:19Z

Imagined vs. Real

@@ Line 2: / Line 2: @@
 ==Imagined vs. Real==
-In [[User Tutorial:Performing an Offline Analysis of EEG Data]], we used the eeg1 sample data that was recorded for a single subject responding to separate instructions to move both feet, both hands and rest.  In BCI, we typically desire to be able to communicate with an external device without actual movement.  Fortunately, results
+BCI experiments will typically consist of sessions where the subject is asked to perform a movement followed by sessions where the user is asked to imagine making that movement.  Comparing these data can help us to understand the relationship between doing and imagining.  The images that follow show the results from the eeg1 data that were derived in [[User Tutorial:...]] followed by the results of an analysis performed on a different set of data recorded from the same subject.  In the latter recordings, the subject was asked to imagine moving his feet or hands rather than actually performing these movements.
 ==Center vs. Off-center Results==

Jfialkoff at 22:43, 8 January 2008

2008-01-08T22:43:17Z

← Older revision		Revision as of 22:43, 8 January 2008
Line 1:		Line 1:
	In [[User Tutorial:Performing an Offline Analysis of EEG Data]], we used ''BCI2000 Offline Analysis'' to generate a feature plot, topographies and spectra for the eeg1 sample data comprising the data files <tt>eeg1_1.dat</tt>, <tt>eeg1_2.dat</tt> and <tt>eeg1_3.dat</tt>. In this continuation of the tutorial, we'll compare our results from [[User Tutorial:Performing an Offline Analysis of EEG Data]] to analyses of other data from the same subject.		In [[User Tutorial:Performing an Offline Analysis of EEG Data]], we used ''BCI2000 Offline Analysis'' to generate a feature plot, topographies and spectra for the eeg1 sample data comprising the data files <tt>eeg1_1.dat</tt>, <tt>eeg1_2.dat</tt> and <tt>eeg1_3.dat</tt>. In this continuation of the tutorial, we'll compare our results from [[User Tutorial:Performing an Offline Analysis of EEG Data]] to analyses of other data from the same subject.

	~~We will also be using~~ the ~~eegImag1.dat~~, ~~eegImag2.dat~~ and ~~eegImag3.dat sessions~~. ~~These sessions are labeled similarly but instead of~~ actual movement~~, the subject was instructed to imagine performing the given instruction (e.g~~., ~~imagine moving both feet)~~.		==Imagined vs. Real==
			In [[User Tutorial:Performing an Offline Analysis of EEG Data]], we used the eeg1 sample data that was recorded for a single subject responding to separate instructions to move both feet, both hands and rest. In BCI, we typically desire to be able to communicate with an external device without actual movement. Fortunately, results

			==Center vs. Off-center Results==