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Abstract #3864

Olfaction connectivity in Patients with Parkinson’s disease: A comparative fMRI study.

S Senthil Kumaran1, Shefali Chaudhary1, Vinay Goyal2, Priyanka Bhat2, Ankita Sharma2, Gauri Shanker Kaloiya3, and Mani Kalaivani4

1NMR & MRI Facilty, All India Institute of Medical Sciences, New Delhi, India, 2Neurology, All India Institute of Medical Sciences, New Delhi, India, 3All India Institute of Medical Sciences, New Delhi, India, 4Biostatistics, All India Institute of Medical Sciences, New Delhi, India

Olfactory loss is one of the most common non-motor symptoms in Patients with Parkinson’s disease. ROI based functional connectivity analysis was performed on 10 healthy subjects (HC, 6M/4F, mean age=57±4.5 years) and 10 subjects with Parkinson’s disease (9M/1F, mean age=57.7±5.6 years) with olfaction fMRI (floral smell). Altered olfaction linked functional connectivity was present for amygdala, insula and cingulate gyrus in PD. Functional connectivity for olfactory cognition (hippocampus/orbitofrontal) was found intact in both the groups. Primary olfactory structures are more affected compared to the upstream structures, leading to the observed olfactory impairment.

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