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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
Published on: July 28, 2013
Microstructural thalamic changes in schizophrenia: a combined anatomic and diffusion weighted magnetic resonance
Nivedita Agarwal1, Gianluca Rambaldelli, Cinzia Perlini
1Department of Medical and Morphological Research, Section of Radiology, University of Udine, Udine, Italy.
Journal of Psychiatry & Neuroscience : JPN
|September 13, 2008
Summary
Schizophrenia patients show altered thalamic microstructure integrity, with increased apparent diffusion coefficient (ADC) values, despite maintained thalamus size. These subtle structural changes suggest cytoarchitectural disruption, supporting corticothalamic misconnection theories.
Area of Science:
- Neuroimaging
- Psychiatric Disorders
- Neuroanatomy
Background:
- The thalamus plays a role in schizophrenia pathophysiology.
- Previous studies suggest abnormal thalamic microstructure in schizophrenia using diffusion-weighted imaging (DWI).
Purpose of the Study:
- To investigate thalamic volumes and microstructural integrity in schizophrenia using structural MRI and DWI.
- This study aimed to explore thalamic abnormalities in schizophrenia for the first time.
Main Methods:
- Structural MRI and DWI were used to measure thalamic volumes and apparent diffusion coefficient (ADC) values in 71 schizophrenia patients and 75 controls.
- The presence of adhesio interthalamica was also assessed.
Main Results:
- No significant differences in thalamus volume were found between groups, though a trend for decreased left volumes was observed.
- Thalamic ADC values were significantly increased in schizophrenia patients, indicating altered microstructure.
- Age correlated with thalamic volumes and ADC values, but no significant associations were found between clinical variables and imaging measures.
Conclusions:
- Schizophrenia is associated with widespread altered thalamic microstructure integrity, even with preserved thalamus size.
- Subtle structural abnormalities at the cytoarchitectural level may contribute to corticothalamic misconnections in schizophrenia.
- Further research is needed to explore thalamic tissue coherence and its role in cognitive disturbances in schizophrenia.
