Abstract
Persistent postural-perceptual dizziness (PPPD) is a recently defined syndrome with chronic dizziness interrupting daily life. Although the high levels of anxiety and functional changes in postural control strategy and multi-sensory information processing and integration may be underlying the pathophysiology, its neural mechanisms are poorly understood. The aim of this study was to examine the regional cerebral blood flow (rCBF) in patients with PPPD using single photon emission computed tomography (SPECT). A total of 25 patients with PPPD and 25 healthy controls participated in the study. All participants underwent brain SPECT and the patients completed the Dizziness Handicap Inventory. SPECT images were compared between the groups, and the correlation of rCBF and disease severity/duration was assessed in patients. Compared with controls, PPPD patients showed a significantly decreased rCBF in the insula and frontal lobe, mainly in the left posterior insula, bilateral superior frontal gyrus, right inferior frontal gyrus, right precentral gyrus, and left medial orbital gyrus. Additionally, PPPD patients showed a significant rCBF increase in the bilateral cerebellum compared with controls. The results of our study suggest that the altered rCBF in the insular, frontal, and cerebellar cortices might be reflecting the process of maladaptation and the compensatory responses for the changes in PPPD.
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07 February 2019
The authors inadvertently forgot to provide the following funding information in the original publication: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Science and ICT (2018R1A6A3A11041118).
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Na, S., Im, J.J., Jeong, H. et al. Cerebral perfusion abnormalities in patients with persistent postural-perceptual dizziness (PPPD): a SPECT study. J Neural Transm 126, 123–129 (2019). https://doi.org/10.1007/s00702-018-1948-3
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DOI: https://doi.org/10.1007/s00702-018-1948-3