Resting-state connectivity in the prodromal phase of schizophrenia: insights from EEG microstates

…, PL Faber, G Leicht, D Schoettle, N Polomac… - Schizophrenia …, 2014 - Elsevier
… In the present study, the above criteria were met by n = 5, n = 1 and n = 15 HR subjects,
respectively (please note that more than one criterion might apply to the same subject). …

Increased resting-state gamma-band connectivity in first-episode schizophrenia

C Andreou, G Nolte, G Leicht, N Polomac… - Schizophrenia …, 2015 - academic.oup.com
… is expected to be the case in schizophrenia) led indeed to deficits in gamma-band activity
33 ; however, the prominent glutamate hypothesis of schizophrenia postulates impaired N -…

[HTML][HTML] Sequential implementation of DSC-MR perfusion and dynamic [18F]FET PET allows efficient differentiation of glioma progression from treatment-related …

…, SA Hmeidan, N Polomac, CP Filss, N Galldiks… - European journal of …, 2021 - Springer
… (n = 42) or clinico-radiological follow-up (n = 62). The … (n = 83) and TRC (n = 21) was based
on histopathology in 42 cases (40%; resection, n = 35 (including 5 TRC cases); biopsy, n = 7 (…

Resting-state theta-band connectivity and verbal memory in schizophrenia and in the high-risk state

C Andreou, G Leicht, G Nolte, N Polomac, S Moritz… - Schizophrenia …, 2015 - Elsevier
… In the present study, the above criteria were fulfilled in n = 10, n = 3 and n = 23 HR subjects,
respectively (please note that more than one criterion might apply to the same subject). …

EEG-informed fMRI reveals a disturbed gamma-band–specific network in subjects at high risk for psychosis

G Leicht, S Vauth, N Polomac, C Andreou… - Schizophrenia …, 2016 - academic.oup.com
… diagnoses (mood disorder n = 11; anxiety/obsessive-compulsive disorder n = 6; substance
related disorders n = 6 [all subjects currently abstinent]; and personality disorders n = 1; for …

Conscious auditory perception related to long-range synchrony of gamma oscillations

S Steinmann, G Leicht, M Ertl, C Andreou, N Polomac… - Neuroimage, 2014 - Elsevier
… , which is highly contaminated by the instantaneous artifactual component, is defined as:(1)
φ x , y 2 t ω = f x , y t ω 2 = Re f x , y t ω 2 + Im f x , y t ω 2 with:(2) f x , y t ω = 1 N R ∑ k = 1 N R …

[HTML][HTML] Frequency drift in MR spectroscopy at 3T

…, R Peeters, SJ Peltier, U Pilatus, N Polomac… - NeuroImage, 2021 - Elsevier
Purpose Heating of gradient coils and passive shim components is a common cause of
instability in the B 0 field, especially when gradient intensive sequences are used. The aim of the …

Neural mechanisms of placebo anxiolysis

B Meyer, KSL Yuen, M Ertl, N Polomac… - Journal of …, 2015 - Soc Neuroscience
… This procedure reduced sample sizes to N = 28 in Study 1 and N = 27 in Study 2. Of these,
N = 26 and N = 23, respectively, could be analyzed for effects on skin conductance and N = …

Glutamatergic deficit and schizophrenia-like negative symptoms: new evidence from ketamine-induced mismatch negativity alterations in healthy male humans

…, G Leicht, S Curic, S Steinmann, N Polomac… - Journal of Psychiatry and …, 2017 - jpn.ca
Background: Targeting the N-methyl-d-aspartate receptor (NMDAR) is a major translational
approach for treating negative symptoms of schizophrenia. Ketamine comprehensively …

Reduced auditory evoked gamma band response and cognitive processing deficits in first episode schizophrenia

G Leicht, C Andreou, N Polomac, C Lanig… - The World Journal of …, 2015 - Taylor & Francis
Objectives. Gamma-band oscillations (eg, the early auditory evoked gamma-band response,
aeGBR) have been suggested to mediate cognitive and perceptual processes by driving …