Research Topics
| C J JamesSummaryAffiliation: University of Southampton Country: UK Publications
| Collaborators
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Detail Information
Publications
Distinguishing low frequency oscillations within the 1/f spectral behaviour of electromagnetic brain signalsCharmaine Demanuele
Signal Processing and Control Group, Institute of Sound and Vibration Research, University of Southampton, Southampton, UK
Behav Brain Funct 3:62. 2007..abstract:..
Contrasting spatial, temporal and spatio-temporal ICA applied to ictal EEG recordingsChristopher J James
ISVR, University of Southampton, UK
Conf Proc IEEE Eng Med Biol Soc 2008:3336-9. 2008..This work is being expanded for seizure onset analysis through scalp EEG...
Space-time ICA versus Ensemble ICA for ictal EEG analysis with component differentiation via Lempel-Ziv complexityChristopher J James
Signal Processing and Control Group, ISVR, University of Southampton, UK
Conf Proc IEEE Eng Med Biol Soc 2007:5473-6. 2007..This work is being further expanded for seizure onset analysis...- On spatio-temporal component selection in space-time independent component analysis: an application to ictal EEGChristopher J James
Signal Processing and Control Group, ISVR, University of Southampton, SO17 1BJ, UK
Conf Proc IEEE Eng Med Biol Soc 2009:3154-7. 2009..We test this on ictal EEG segments where it can be seen that different underlying processes possess characteristic signatures in both modalities which can be utilized for the clustering (or process selection) stage... - Seizure prediction for epilepsy using a multi-stage phase synchrony based systemChristopher J James
Signal Processing and Control Group, ISVR, University of Southampton, SO171 BJ, UK
Conf Proc IEEE Eng Med Biol Soc 2009:25-8. 2009..We show the possibility of seizure onset prediction within a prediction window of 35-65 minutes with a sensitivity of 65-100% and specificity of 65-80% across epileptic patients... - Blind source separation in single-channel EEG analysis: an application to BCIC J James
Signal Processing and Control Group, ISVR, University of Southampton, Southampton, UK
Conf Proc IEEE Eng Med Biol Soc . 2006..We show that rhythmic activity in the 8 to 12Hz band can be extracted in the case of imagined hand movements for a particular BCI paradigm... - On the analysis of single versus multiple channels of electromagnetic brain signalsChristopher J James
Signal Processing and Control Group, ISVR, University of Southampton, Southampton SO17 1BJ, United Kingdom
Artif Intell Med 37:131-43. 2006..In this paper we objectively assess a novel methodology which exploits only a single measurement channel to extract information of interest relatively independent of channel location (relative to the source of interest)... - Independent component analysis for biomedical signalsChristopher J James
Signal Processing and Control Group, ISVR, University of Southampton, Southampton SO17 IBJ, UK
Physiol Meas 26:R15-39. 2005..Finally, advanced implementations of ICA are illustrated as applied to neurophysiologic signals in the form of electro-magnetic brain signals data... - Objective source selection in Blind Source Separation of AEPs in children with Cochlear ImplantsN Castañeda-Villa
ISVR, University of Southampton, SO171BJ, UK
Conf Proc IEEE Eng Med Biol Soc 2007:6224-7. 2007..Temporal decorrelation based ICA showed the least change in the estimation of both the AEPs and the CI artifact; this has allowed for considerable autonomy in the construction of relevant, consistent clusters... - Focal artifact removal from ongoing EEG--a hybrid approach based on spatially-constrained ICA and wavelet de-noisingMuhammad Tahir Akhtar
Signal Processing and Control Group, Institute of Sound and Vibration Research, University of Southampton, Southampton, UK
Conf Proc IEEE Eng Med Biol Soc 2009:4027-30. 2009..Simulation results demonstrate the effectiveness of the proposed approach in removing focal artifacts that can be well separated by SCICA... - Tracking and detection of epileptiform activity in multichannel ictal EEG using signal subspace correlation of seizure source scalp topographiesC W Hesse
Signal Processing and Control Group, Institute of Sound and Vibration Research, University of Southampton, Southampton, UK
Med Biol Eng Comput 45:909-16. 2007.... - The selection of optimal ICA algorithm parameters for robust AEP component estimates using 3 popular ICA algorithmsN Castañeda-Villa
Audiology Laboratory, at Universidad Autónoma Metropolitana Izt, Mexico
Conf Proc IEEE Eng Med Biol Soc 2008:5216-9. 2008..We show that the algorithm utilizing temporal structure, such as TDSEP-ICA, is better in estimating the components of the auditory response, in recordings contaminated by CI artifacts, than higher order statistics based algorithms... - Time-structure based reconstruction of physiological independent sources extracted from noisy abdominal phonogramsAída Jiménez-González
Signal Processing and Control Group, Institute of Sound and Vibration Research, University of Southampton, Southampton SO171BJ, UK
IEEE Trans Biomed Eng 57:2322-30. 2010..Further research will be conducted on more phonograms and explore alternatives for dimensional reduction and reconstruction of entire time series suitable for surveillance, not only for fetal well-being, but also for maternal condition... - Independent component analysis for auditory evoked potentials and cochlear implant artifact estimationNorma Castañeda-Villa
Universidad Autónoma Metropolitana Izt, Mexico DF 09340, Mexico
IEEE Trans Biomed Eng 58:348-54. 2011..All the algorithms estimate the CI artifact reasonably well, although only one SOS algorithm is better positioned to estimate the AEP; this is primarily because it uses the temporal structure of this signal as part of the ICA process... - Behavioral pattern detection from Personalized Ambient MonitoringJames D Amor
Signal Processing and Control Group, ISVR, University of Southampton, Hampshire, UK
Conf Proc IEEE Eng Med Biol Soc 2010:5193-6. 2010..We present some preliminary results from a technical trial... - Default-mode brain dysfunction in mental disorders: a systematic reviewSamantha J Broyd
Institute for Disorders of Impulse and Attention, Developmental Brain Behaviour Laboratory, School of Psychology, University of Southampton, UK
Neurosci Biobehav Rev 33:279-96. 2009..Finally, we provide an integrative overview and highlight important challenges and tasks for future research... - Slow neuronal oscillations in the resting brain vs task execution: A BSS investigation of EEG recordingsCharmaine Demanuele
Signal Processing and Control Group, ISVR, University of Southampton, SO17 1BJ, UK
Conf Proc IEEE Eng Med Biol Soc 2010:1638-41. 2010..The methodology and findings presented here provide a new basis for assessing neural activity during various mental conditions... - On the independent component analysis of evoked potentials through single or few recording channelsSuogang Wang
Signal Processing and Control Group, ISVR, University of Southampton, UK
Conf Proc IEEE Eng Med Biol Soc 2007:5433-6. 2007..These advantages are paramount for building a more reliable and robust system for use in real-world BCI--i.e. for use outside of the clinical laboratory... - Narrowband vs. broadband phase synchronization analysis applied to independent components of ictal and interictal EEGDisha Gupta
Signal Processing and Control Group, ISVR, University of Southampton, UK
Conf Proc IEEE Eng Med Biol Soc 2007:3864-7. 2007..These observations lead us to believe that tracking changes in phase synchronization of narrow band activity, on continuous data records will be of great value in the context of seizure prediction... - Independent component analysis for extraction of critical features from tongue movement ear pressure signalsRavi Vaidyanathan
Institute of Sound and Vibration Research ISVR, University of Southampton, Southampton, UK
Conf Proc IEEE Eng Med Biol Soc 2007:5481-4. 2007..In future work, these findings are expected to lead to an entirely new generation of unobtrusive human-machine interface mechanisms... - Tracking and detection of epileptiform activity in multichannel ictal EEG using signal subspace correlation of seizure source scalp topographiesC W Hesse
Signal Processing and Control Group, Institute of Sound and Vibration Research, University of Southampton, UK
Med Biol Eng Comput 43:764-70. 2005.... - Extracting sources from noisy abdominal phonograms: a single-channel blind source separation methodA Jimenez-Gonzalez
Institute of Sound and Vibration Research, University of Southampton, Highfield, UK
Med Biol Eng Comput 47:655-64. 2009..So, this approach extracts physiological sources from noisy abdominal phonograms, and we believe it will be useful for surveillance, not only for foetal well-being but also for maternal condition... - Altered spontaneous low frequency brain activity in attention deficit/hyperactivity disorderSuzannah K Helps
Institute for Disorders for Impulse and Attention, Developmental Brain Behaviour Laboratory, School of Psychology, University of Southampton, UK
Brain Res 1322:134-43. 2010..ADHD children may have deficits both in maintaining a resting brain when needed and 'protecting' an active brain from the intrusion of resting state brain activity... - Temporally constrained ICA: an application to artifact rejection in electromagnetic brain signal analysisChristopher J James
Biomedical Information Engineering Research Group, Aston University, Aston Triangle, Birmingham B4 7ET, U K
IEEE Trans Biomed Eng 50:1108-16. 2003..This paper shows that cICA can be applied with great success to EM brain signal analysis, with an initial application in automating artifact extraction in EEG and MEG... - On semi-blind source separation using spatial constraints with applications in EEG analysisChristian W Hesse
F C Donders Centre for Cognitive Neuroimaging, Kapittelweg 29, 6525 EN Nijmegen, The Netherlands
IEEE Trans Biomed Eng 53:2525-34. 2006.... - Non-linear analysis of intracranial electroencephalogram recordings with approximate entropy and Lempel-Ziv complexity for epileptic seizure detectionDaniel Abasolo
Biomedical Engineering Group, Department of Signal Theory and Communications, ETSI de Telecomunicación, University of Valladolid, Camino del Cementerio s n, 47011, Valladolid, Spain
Conf Proc IEEE Eng Med Biol Soc 2007:1953-6. 2007..Our results suggest that these techniques are useful to detect changes due to epileptic seizures in the EEG... - Extracting multisource brain activity from a single electromagnetic channelChristopher J James
Neural Computing Research Group, Aston University, Aston Triangle, Birmingham B4 7ET, UK
Artif Intell Med 28:89-104. 2003..The results are intuitive and meaningful in a neurophysiological setting...