Prefrontal cortex volume deficit in schizophrenia: a new look using 3T MRI with manual parcellation.

Abstract:

:In this study we use high resolution Magnetic Resonance imaging (MRI) and apply rigorous manual tracing criteria in order to assess volumetrically the prefrontal cortex (PFC) in schizophrenia. Previous MRI studies suggested PFC is included in neural systems necessary for emotional processing and cognition, and regional PFC abnormalities might, thus, lead to specific negative symptoms, as well as a frequent association of poorer performance in category switching. The aim of this study was to use 3T imaging and reliable manual parcellation to determine if, as hypothesized, this higher precision would reveal additional MRI abnormalities in PFC in schizophrenia, and an association between PFC abnormalities and specific negative symptoms, as well as in category switching. Using 3-T MRI, 27 schizophrenia patients and 27 healthy controls were examined. PFC was manually parcellated into frontal pole, superior frontal gyrus (SFG), middle frontal gyrus (MFG), and inferior frontal gyrus (IFG). Left SFG (p=0.004), bilateral MFG (left: p=0.007; right: p=0.007), and bilateral IFG (left: p<0.001; right: p=0.002) showed volume reduction. There were symptom associations between smaller left MFG volumes and more affective flattening (R=-0.465, p=0.015), and smaller left IFG volumes and poorer performance on the alternating semantic category test (R=0.440, p=0.025). In summary, 3-T imaging revealed widespread gyral volume deficits in PFC gyri, and specific associations with selective negative symptoms, such as affective flattening, and with deficits in cognitive switching.

journal_name

Schizophr Res

journal_title

Schizophrenia research

authors

Ohtani T,Levitt JJ,Nestor PG,Kawashima T,Asami T,Shenton ME,Niznikiewicz M,McCarley RW

doi

10.1016/j.schres.2013.10.026

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

184-90

issue

1

eissn

0920-9964

issn

1573-2509

pii

S0920-9964(13)00576-8

journal_volume

152

pub_type

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