Functional connectivity in the brain—is it an elusive concept?

AA Fingelkurts, AA Fingelkurts, S Kähkönen - … & Biobehavioral Reviews, 2005 - Elsevier
Even though functional brain connectivity is an influential concept in modern cognitive
neuroscience, it is a very controversial notion. This is why further theoretical and methodological …

Consensus paper: combining transcranial stimulation with neuroimaging

…, L De Gennaro, AP Strafella, S Kähkönen… - Brain stimulation, 2009 - Elsevier
In the last decade, combined transcranial magnetic stimulation (TMS)-neuroimaging studies
have greatly stimulated research in the field of TMS and neuroimaging. Here, we review …

The effect of stimulus intensity on brain responses evoked by transcranial magnetic stimulation

S Komssi, S Kähkönen, RJ Ilmoniemi - Human brain mapping, 2004 - Wiley Online Library
To better understand the neuronal effects of transcranial magnetic stimulation (TMS), we
studied how the TMS‐evoked brain responses depend on stimulation intensity. We measured …

Impaired functional connectivity at EEG alpha and theta frequency bands in major depression

…, K Suominen, E Isometsä, S Kähkönen - Human brain …, 2007 - Wiley Online Library
Recent reports on functional brain imaging in major depression have lead to an assumption
that observed psychopathology might be related to an altered brain functional connectivity. …

Reproducibility of TMS—Evoked EEG responses

…, P Savolainen, JP Mäkelä, S Kähkönen - Human brain …, 2009 - Wiley Online Library
Navigated transcranial magnetic stimulation combined with electroencephalography (nTMS‐EEG),
allows noninvasive studies of cortical excitability and connectivity in humans. We …

Central auditory dysfunction in schizophrenia as revealed by the mismatch negativity (MMN) and its magnetic equivalent MMNm: a review

R Näätänen, S Kähkönen - International Journal of …, 2009 - academic.oup.com
Since the early 1990s, the auditory change-detection response, mismatch negativity (MMN)
and its magnetoencephalographic (MEG) equivalent MMNm have been applied in a large …

The novelty value of the combined use of electroencephalography and transcranial magnetic stimulation for neuroscience research

S Komssi, S Kähkönen - Brain research reviews, 2006 - Elsevier
Electroencephalographic (EEG) responses measured simultaneously with transcranial
magnetic stimulation (TMS) have opened a new window into the human nervous system. The …

Modulation of electroencephalographic responses to transcranial magnetic stimulation: evidence for changes in cortical excitability related to movement

VV Nikulin, D Kičić, S Kähkönen… - European Journal of …, 2003 - Wiley Online Library
Transcranial magnetic stimulation (TMS) and multichannel electroencephalography (EEG)
were used for the investigation of cortical excitability preceding voluntary movement in human …

Breakdown of long-range temporal correlations in theta oscillations in patients with major depressive disorder

…, K Suominen, E Isometsä, S Kähkönen - Journal of …, 2005 - Soc Neuroscience
Neuroimaging has revealed robust large-scale patterns of high neuronal activity in the
human brain in the classical eyes-closed wakeful rest condition, pointing to the presence of a …

Cognitive function during early abstinence from opioid dependence: a comparison to age, gender, and verbal intelligence matched controls

P Rapeli, R Kivisaari, T Autti, S Kähkönen, V Puuskari… - Bmc Psychiatry, 2006 - Springer
Background Individuals with opioid dependence have cognitive deficits during abuse period
in attention, working memory, episodic memory, and executive function. After protracted …