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International Journal of Neuroscience Volume 118, 2008 - Issue 1
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Original

ABNORMAL ERPS AND HIGH FREQUENCY BANDS POWER IN MULTIPLE SCLEROSIS

M. VÁZQUEZ-MARRUFO Psychobiology Lab Department of Experimental Psychology, University of Seville, Seville, Spain; Multiple Sclerosis Unit, Hospital Virgen Macarena, Seville, Spain
,
J. J. GONZÁLEZ-ROSA Psychobiology Lab Department of Experimental Psychology, University of Seville, Seville, Spain; Multiple Sclerosis Unit, Hospital Virgen Macarena, Seville, Spain
,
E. VAQUERO Psychobiology Lab Department of Experimental Psychology, University of Seville, Seville, Spain
,
P. DUQUE Multiple Sclerosis Unit, Hospital Virgen Macarena, Seville, Spain
,
C. ESCERA Cognitive Neuroscience Research Group, Department of Psychiatry and Clinical Psychobiology University of Barcelona, Catalonia, Spain
,
M. BORGES Multiple Sclerosis Unit, Hospital Virgen Macarena, Seville, Spain
,
G. IZQUIERDO Multiple Sclerosis Unit, Hospital Virgen Macarena, Seville, Spain
&
C. M. GÓMEZ Psychobiology Lab Department of Experimental Psychology, University of Seville, Seville, Spain
 show all
Pages 27-38 | Received 11 Jul 2006, Published online: 24 Aug 2009
 
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Abstract

Event-related potentials (ERPs) and power spectral density (PSD) were registered during an auditory-oddball paradigm in 11 MS patients. These patients showed a decrease in the amplitude of P2 and N2 components and a delayed P3 latency compared to control subjects suggesting that the attentional orienting mechanism in the auditory modality is affected in MS. The PSD analysis showed that MS patients exhibited an increased power in beta and gamma bands. The combined analysis of frequency and time domain suggested diverse phenomena that occurred in the MS patient group related with the EEG background or the motivational status.

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