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

2006 ◽  
Vol 28 (3) ◽  
pp. 247-261 ◽  
Author(s):  
Andrew A. Fingelkurts ◽  
Alexander A. Fingelkurts ◽  
Heikki Rytsälä ◽  
Kirsi Suominen ◽  
Erkki Isometsä ◽  
...  
Keyword(s):  
Major Depression ◽  
Functional Connectivity ◽  
Frequency Bands ◽  
Theta Frequency ◽  
Eeg Alpha

Opioid withdrawal results in an increased local and remote functional connectivity at EEG alpha and beta frequency bands

2007 ◽  
Vol 58 (1) ◽  
pp. 40-49 ◽  
Author(s):  
Andrew A. Fingelkurts ◽  
Alexander A. Fingelkurts ◽  
Reetta Kivisaari ◽  
Taina Autti ◽  
Sergei Borisov ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Opioid Withdrawal ◽  
Frequency Bands ◽  
Eeg Alpha ◽  
Beta Frequency

Increased local and decreased remote functional connectivity at EEG alpha and beta frequency bands in opioid-dependent patients

2006 ◽  
Vol 188 (1) ◽  
pp. 42-52 ◽  
Author(s):  
Andrew A. Fingelkurts ◽  
Alexander A. Fingelkurts ◽  
Reetta Kivisaari ◽  
Taina Autti ◽  
Sergei Borisov ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Frequency Bands ◽  
Eeg Alpha ◽  
Beta Frequency

scholarly journals Identifying Mild Cognitive Impairment in Parkinson’s Disease With Electroencephalogram Functional Connectivity

2021 ◽  
Vol 13 ◽  
Author(s):  
Min Cai ◽  
Ge Dang ◽  
Xiaolin Su ◽  
Lin Zhu ◽  
Xue Shi ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Cognitive Impairment ◽  
Functional Connectivity ◽  
Pathophysiological Mechanism ◽  
Frequency Bands ◽  
Eyes Closed ◽  
Theta Frequency ◽  
Connectivity Patterns ◽  
Left And Right

ObjectiveCognitive impairment occurs frequently in Parkinson’s disease (PD) and negatively impacts the patient’s quality of life. However, its pathophysiological mechanism remains unclear, hindering the development of new therapies. Changes in brain connectivity are related to cognitive impairment in patients with PD, with the dorsolateral prefrontal cortex (DLPFC) being considered the essential region related to PD cognitive impairment. Nevertheless, few studies have focused on the global connectivity responsible for communication with the DLPFC node, the posterior division of the middle frontal gyrus (PMFG) in patients with PD; this was the focus of this study.MethodsWe applied resting-state electroencephalography (EEG) and calculated a reliable functional connectivity measurement, the debiased weighted phase lag index (dWPLI), to examine inter-regional functional connectivity in 68 patients with PD who were classified into two groups according to their cognitive condition.ResultsWe observed that altered left and right PMFG-based functional connectivity associated with cognitive impairment in patients with PD in the theta frequency bands under the eyes closed condition (r = −0.426, p < 0.001 and r = −0.437, p < 0.001, respectively). Exploratory results based on the MoCA subdomains indicated that poorer visuospatial function was associated with higher right PMFG-based functional connectivity (r = −0.335, p = 0.005), and poorer attention function was associated with higher left and right PMFG-based functional connectivity (r = −0.380, p = 0.001 and r = −0.256, p = 0.035, respectively). Further analysis using logistic regression and receiver operating characteristic (ROC) curves found that this abnormal functional connectivity was an independent risk factor for cognitive impairment [odds ratio (OR): 2.949, 95% confidence interval (CI): 1.294–6.725, p = 0.01 for left PMFG; OR: 11.278, 95% CI: 2.578–49.335, p = 0.001 for right PMFG, per 0.1 U], and provided moderate classification power to discriminate between cognitive abilities in patients with PD [area under the ROC curve (AUC) = 0.770 for left PMFG; AUC = 0.809 for right PMFG].ConclusionThese preliminary findings indicate that abnormal PMFG-based functional connectivity patterns associated with cognitive impairment in the theta frequency bands under the eyes closed condition and altered functional connectivity patterns have the potential to act as reliable biomarkers for identifying cognitive impairment in patients with PD.

scholarly journals Increased functional connectivity within alpha and theta frequency bands in dysphoria: A resting-state EEG study

2021 ◽  
Vol 281 ◽  
pp. 199-207
Author(s):  
Carola Dell'Acqua ◽  
Shadi Ghiasi ◽  
Simone Messerotti Benvenuti ◽  
Alberto Greco ◽  
Claudio Gentili ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Resting State ◽  
Frequency Bands ◽  
Theta Frequency

P.0072 Anxious distress in major depression: an fMRI study of amygdala reactivity and functional connectivity

2021 ◽  
Vol 53 ◽  
pp. S51-S52
Author(s):  
L. Nawijn ◽  
R. Dinga ◽  
M. Aghajani ◽  
N.J.A. Van der Wee ◽  
M.J. Van Tol ◽  
...  
Keyword(s):  
Major Depression ◽  
Functional Connectivity ◽  
Fmri Study ◽  
Amygdala Reactivity
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