ERP-Lab 台大醫院精神部 神經生理研究室

ERP, MMN, P50, schizophrenia, prodrome, MEG

Archive for the ‘文獻理論’

Source localization vs. Source imaging

開宗明義,先看看Source localization vs. Source imaging的定義有何不同? 來自Medical College of Wisconsin

接下來看看這篇 Review articleEEG source imaging Clinical Neurophysiology, Volume 115, Issue 10, October 2004, Pages 2195-2222

維基百科中的blind source separation

Autistic Disorder Spectrum的P50

Sensory gating in young children with autism: relation to age, IQ, and EEG gamma oscillations. Orekhova et al., 2008, Neuroscience Letters

  • P50 suppression in response to 2nd click (3-8 y/o, n=21/21) –Normal in HFA, but reduced in Autism with MR –Improved with age –Suggesting ineffective inhibitory control of sensory processing for retarded autism à excitation/ inhibition imbalance
  • Higher ongoing EEG gamma power corresponded to lower P50 suppression in autism (p<0.02), but not in control group. The data suggest that ineffective inhibitory control of sensory processing is characteristic for retarded children with autism and may reflect excitation/inhibition imbalance in this clinical group.

Disordered connectivity in the autistic brain: Challenges for the’new psychophysiology’International Journal of Psychophysiology, Volume 63, Issue 2, February 2007, Pages 164-172這一篇提出了自閉症的connectivity假說:  (這篇文章值得一讀!)


ERP of Prodrome

與Prodrome有關的MMN文獻如下 (繼續閱讀…)

M50/M100: 用MEG做P50/N100

New Mexican研究團隊,對於M50特別有研究心得

Lateralized abnormalities in auditory M50 sensory gating and cortical thickness of the superior temporal gyrus in post-traumatic stress disorder: Preliminary results Original Research Article
Psychiatry Research: Neuroimaging, In Press, Corrected Proof, Available online 6 January 2011
Michael Hunter, Gerardo Villarreal, Greg R. McHaffie, Billy Jimenez, Ashley K. Smith, Lawrence A. Calais, Faith Hanlon, Robert J. Thoma, José M. Cañive

因為MEGnovel technology,非常罕見稀有(就像靈長類研究,作一兩隻猴子也可以發表),所以下面這一篇MEG作不出P50也可以發表在Schizophrenia Research (繼續閱讀…)

P50與symptom dimension!

2005年,一群法國人發現比起PANSS負性總分低的55位schizophrenia patients,PANSS負性總分高的31位schizophrenia patients具有significantly increased T/C ratios[P50 inhibitory gating deficit is correlated with the negative symptomatology of schizophrenia. Psychiatry Research. 136 27-34]

不過同年New Mexico研究團隊(MXHuang, Michael Weisand)同時做ERP(P50)與MEG(M50),最後發現Negative symptom與P50無關,但卻與M50有相關      M50 sensory gating predicts negative symptoms in schizophrenia. Schizophrenia Research 2005 Mar 1;73(2-3):311-8.

一樣是用MEG:這一篇1998年[Resersal of cerebral asymmetry  in schizophrenia  measured with magnetoencephalography]認為reversed left-right asymmelry與PANSS general psychopathological score有相關


    M50 of FEP: MEG does not reveal impaired sensory gating in first-episode schizophrenia Schizophrenia Research 2010;121(1-3) Pages 131-138

    Gating in vs. Gating out? S1 vs. S2?


    [Clementz BA, Blumenfeld LD (2001): Multichannel electroencephalographic assessment of auditory evoked response suppression in schizophrenia. Experimental Brain Research. 139:377-390].(認為S1比S2重要) S1 amplitudes largely determine differences between normal and schizophrenia groups on AER suppression

    [Fuerst DR, Gallinat J, Boutros NN (2007): Range of sensory gating values and test-retest reliability in normal subjects. Psychophysiology. 44:620-626.]一文認為S1 Amplitude對於 Gating的貢獻:差!

    另外,也可參考Klevest Gjini, Cynthia Arfken, Nash N. Boutros (這一篇作了P50/N100/MMN,這些我們都有耶)  Relationships between sensory “gating out” and sensory “gating in” of auditory evoked potentials in schizophrenia: A pilot study Schizophrenia Research  2010; 121(1-3) Pages 139-145

    Event-related potential abnormalities in schizophrenia: A failure to “gate in” salient information?

    Schizophrenia ResearchVolume 113, Issues 2-3September 2009Pages 332-338 Colleen A. Brenner, Paul D. Kieffaber, Brett A. Clementz, Jason K. Johannesen, Anantha Shekhar, Brian F. O’Donnell, William P. Hetrick

    Auditory evoked potential variability in healthy and schizophrenia subjects.Jansen BH, Hu L, Boutros NN. Clin Neurophysiol. 2010 Apr 1.  認為gating deficit的兩個機制: First, the S1 response consistency is less in schizophrenia than in health. Second, the S2 responses are attenuated less in schizophrenia.

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