TY - JOUR
T1 - Resting-state functional connectivity alterations in the default network of schizophrenia patients with persistent auditory verbal hallucinations
AU - Alonso-Solís, Anna
AU - Vives-Gilabert, Yolanda
AU - Grasa, Eva
AU - Portella, Maria J.
AU - Rabella, Mireia
AU - Sauras, Rosa Blanca
AU - Roldán, Alexandra
AU - Núñez-Marín, Fidel
AU - Gómez-Ansón, Beatriz
AU - Pérez, Víctor
AU - Alvarez, Enric
AU - Corripio, Iluminada
PY - 2015/2/1
Y1 - 2015/2/1
N2 - © 2014 Elsevier B.V. To understand the neural mechanism that underlies treatment resistant auditory verbal hallucinations (AVH), is still an important issue in psychiatric research. Alterations in functional connectivity during rest have been frequently reported in patients with schizophrenia. Though the default mode network (DN) appears to be abnormal in schizophrenia patients, little is known about its role in resistant AVH. We collected resting-state functional magnetic resonance imaging (R-fMRI) data with a 3. T scanner from 19 schizophrenia patients with chronic AVH resistant to pharmacological treatment, 14 schizophrenia patients without AVH and 20 healthy controls. Using seed-based correlation analysis, we created spherical seed regions of interest (ROI) to examine functional connectivity of the two DN hub regions (posterior cingulate cortex and anteromedial prefrontal cortex) and the two DN subsystems: dorsomedial prefrontal cortex subsystem and medial temporal lobe subsystem (p < 0.0045 corrected). Patients with hallucinations exhibited higher FC between dMPFC ROI and bilateral central opercular cortex, bilateral insular cortex and bilateral precentral gyrus compared to non hallucinating patients and healthy controls. Additionally, patients with hallucinations also exhibited lower FC between vMPFC ROI and bilateral paracingulate and dorsal anterior cingulate cortex. As the anterior cingulate cortex and the insula are two hubs of the salience network, our results suggest cross-network abnormalities between DN and salience system in patients with persistent hallucinations.
AB - © 2014 Elsevier B.V. To understand the neural mechanism that underlies treatment resistant auditory verbal hallucinations (AVH), is still an important issue in psychiatric research. Alterations in functional connectivity during rest have been frequently reported in patients with schizophrenia. Though the default mode network (DN) appears to be abnormal in schizophrenia patients, little is known about its role in resistant AVH. We collected resting-state functional magnetic resonance imaging (R-fMRI) data with a 3. T scanner from 19 schizophrenia patients with chronic AVH resistant to pharmacological treatment, 14 schizophrenia patients without AVH and 20 healthy controls. Using seed-based correlation analysis, we created spherical seed regions of interest (ROI) to examine functional connectivity of the two DN hub regions (posterior cingulate cortex and anteromedial prefrontal cortex) and the two DN subsystems: dorsomedial prefrontal cortex subsystem and medial temporal lobe subsystem (p < 0.0045 corrected). Patients with hallucinations exhibited higher FC between dMPFC ROI and bilateral central opercular cortex, bilateral insular cortex and bilateral precentral gyrus compared to non hallucinating patients and healthy controls. Additionally, patients with hallucinations also exhibited lower FC between vMPFC ROI and bilateral paracingulate and dorsal anterior cingulate cortex. As the anterior cingulate cortex and the insula are two hubs of the salience network, our results suggest cross-network abnormalities between DN and salience system in patients with persistent hallucinations.
KW - Auditory verbal hallucinations
KW - Default mode network
KW - Resting state functional connectivity
KW - Salience network
U2 - 10.1016/j.schres.2014.10.047
DO - 10.1016/j.schres.2014.10.047
M3 - Article
SN - 0920-9964
VL - 161
SP - 261
EP - 268
JO - Schizophrenia Research
JF - Schizophrenia Research
IS - 2-3
ER -