Diffusion tensor tractography in hypothyroidism and its correlation with memory function.

Area of Science:

• Neuroimaging
• Endocrinology
• Cognitive Neuroscience

Background:

• Hypothyroidism can affect cognitive functions, particularly memory.
• White matter integrity is crucial for efficient neural communication and cognitive processing.

Purpose of the Study:

• To investigate microstructural white matter changes in hypothyroid patients using diffusion tensor tractography (DTT).
• To correlate these DTT findings with memory dysfunction scores.

Main Methods:

• Diffusion tensor imaging (DTI) was used to acquire fractional anisotropy (FA) and mean diffusivity (MD) measures.
• DTT was performed on eight hypothyroid patients and eight healthy controls.
• The Postgraduate Institute Memory Scale test assessed memory dysfunction, with Pearson's correlation used for analysis.

Main Results:

• Significant differences in DTI measures were found in various white matter tracts between hypothyroid patients and controls.
• Memory Dysfunction scores showed an inverse correlation with FA in the inferior fronto-occipital fasciculus.
• A positive correlation was observed between Memory Dysfunction scores and MD in the anterior thalamic radiation.

Conclusions:

• Microstructural alterations in white matter fibre tracts are present in hypothyroid patients.
• These white matter changes are associated with memory dysfunction, suggesting a potential mechanism for cognitive impairment in hypothyroidism.