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The influence of endogenous estrogen on high-frequency prefrontal transcranial magnetic stimulation.

Abstract：

BACKGROUND:The use of repetitive transcranial magnetic stimulation (rTMS) as both therapeutic and experimental tools has grown enormously over the past decade. However, variability in response to rTMS is one challenge that remains to be solved. Estrogen can impact neural plasticity and may also affect plastic changes following rTMS. The present study investigated whether estrogen levels influence the neurophysiological effects of high-frequency (HF) rTMS in the left dorsolateral prefrontal cortex (DLPFC). HYPOTHESIS:It was hypothesised that individuals with higher endogenous estrogen would demonstrate greater rTMS-induced changes in cortical reactivity. METHODS:29 healthy adults (15M/14F) received HF-rTMS over left DLPFC. Females attended two sessions, one during a high-estrogen (HE) phase of the menstrual cycle, another during a low-estrogen (LE) phase. Males attended one session. Estrogen level was verified via blood assay. TMS-EEG was used to probe changes in cortical plasticity and comparisons were made using cluster-based permutation statistics and Bayesian analysis. RESULTS:In females, a significant increase in TMS-evoked P60 amplitude, and decrease in N45, N100 and P180 amplitudes was observed during HE. A less pervasive pattern of change was observed during LE. No significant changes in TEPs were seen in males. Between-condition comparisons revealed higher likelihood of the change in N100 and/or P180 being larger in females during HE compared to both females during LE and males. CONCLUSIONS:These preliminary findings indicate that a greater neuroplastic response to prefrontal HF-rTMS is seen in women when estrogen is at its highest compared to men, suggesting that endogenous estrogen levels contribute to variability in response to HF-rTMS.

journal_name

Brain Stimul

journal_title

Brain stimulation

authors

Chung SW,Thomson CJ,Lee S,Worsley RN,Rogasch NC,Kulkarni J,Thomson RH,Fitzgerald PB,Segrave RA

doi

10.1016/j.brs.2019.05.007

subject

Has Abstract

pub_date

2019-01-01 00:00:00

pages

1271-1279

issue

5

eissn

1935-861X

issn

1876-4754

pii

S1935-861X(19)30214-1

journal_volume

12

pub_type

临床试验,杂志文章

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