1. Cortical plasticity is correlated with cognitive improvement in Alzheimer’s disease patients after rTMS treatment
- Author
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Ti-Fei Yuan, Guomin Lian, Dongsheng Zhou, Shaochang Wu, Gangqiao Qi, Xingxing Li, Hong Zheng, and Chang Yu
- Subjects
medicine.medical_specialty ,medicine.medical_treatment ,Biophysics ,Neurosciences. Biological psychiatry. Neuropsychiatry ,Neuropsychological Tests ,behavioral disciplines and activities ,050105 experimental psychology ,03 medical and health sciences ,Cognition ,0302 clinical medicine ,Physical medicine and rehabilitation ,Alzheimer Disease ,rTMS ,mental disorders ,Neuroplasticity ,medicine ,Humans ,0501 psychology and cognitive sciences ,Cortical plasticity ,Predictive marker ,business.industry ,General Neuroscience ,05 social sciences ,Motor Cortex ,Neuropsychology ,Long-term potentiation ,Dorsolateral prefrontal cortex ,Transcranial magnetic stimulation ,medicine.anatomical_structure ,nervous system ,Neurology (clinical) ,Primary motor cortex ,business ,Alzheimer’s disease ,030217 neurology & neurosurgery ,RC321-571 - Abstract
Objective Repetitive transcranial magnetic stimulation (rTMS) has been widely used in non-invasive treatments for different neurological disorders. Few biomarkers are available for treatment response prediction. This study aims to analyze the correlation between changes in long-term potentiation (LTP)-like cortical plasticity and cognitive function in patients with Alzheimer’s disease (AD) that underwent rTMS treatment. Methods A total of 75 AD patients were randomized into either 20 Hz rTMS treatment at the dorsolateral prefrontal cortex (DLPFC) group (n = 37) or a sham treatment group (n = 38) for 30 sessions over six weeks (five days per week) with a three-month follow-up. Neuropsychological assessments were conducted using the Mini-Mental State Examination (MMSE) and Alzheimer’s Disease Assessment-Cognitive Component (ADAS-Cog). The cortical plasticity reflected by the motor-evoked potential (MEP) before and after high-frequency repetitive TMS to the primary motor cortex (M1) was also examined prior to and after the treatment period. Results The results showed that the cognitive ability of patients who underwent the MMSE and ADAS-Cog assessments showed small but significant improvement after six weeks of rTMS treatment compared with the sham group. The cortical plasticity improvement correlated to the observed cognition change. Conclusions Cortical LTP-like plasticity could predict the treatment responses of cognitive improvements in AD patients receiving rTMS intervention. This warrants future clinical trials using cortical LTP as a predictive marker.
- Published
- 2021