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Abstract #3801

Altered connectivity following olfaction fMRI in Patients with Parkinson’s Disease: A comparative study using two different odors

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

1Department of NMR & MRI Facility, All India Institute of Medical Sciences, New Delhi, India, 2Neurology, All India Institute of Medical Sciences, New Delhi, India, 3National Drug Dependence Treatment Centre, All India Institute of Medical Sciences, New Delhi, India

Olfactory impairments are one of the cardinal non-motor symptoms in Parkinson’s Disease (PD). Functional Connectivity analysis was carried out for olfaction task with floral fragrance (smell 1) and citrus fragrance (smell 2) on 10 PD patients (9M/1F, mean age ± SD=57.7±5.6 years). Main effects depicted heterogeneous connectivity and differential lateralization for both the smells. Amygdala and the thalamus were affected for both the smells in patients with PD and may be attributed to the pathology. Olfaction specificity for hippocampal connectivity in floral smell and for orbitofrontal, insula and anterior cingulate in citrus smell suggest differential recruitment of cognition linked areas.

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