Abstract
Objectives To examine the effects of intermittent TBS (iTBS) and continuous TBS (cTBS) on cortical reactivity in the dorsolateral prefrontal cortex. Methods 10 healthy participants were stimulated with either iTBS, cTBS or sham at F3 electrode. Single- and paired-pulse TMS and concurrent electroencephalography (EEG) were used to assess change in cortical reactivity and long-interval intracortical inhibition (LICI) via TMS-evoked potentials (TEPs) and TMS-evoked oscillations. Results Significant increases in N120 amplitudes (p < 0.01) were observed following iTBS over prefrontal cortex. Changes in TMS-evoked theta oscillations and LICI of theta oscillations were also observed following iTBS (increase) and cTBS (decrease). Change in LICI of theta oscillations correlated with change in N120 amplitude following TBS (r = −0.670, p = 0.001). Conclusions This study provides preliminary evidence that TBS produces direct changes in cortical reactivity in the prefrontal cortex. Combining TBS with TMS-EEG may be a useful approach to optimise stimulation paradigms prior to the conduct of clinical trials. Significance TBS is able to modulate cortical reactivity and cortical inhibition in the prefrontal cortex.
| Original language | English |
|---|---|
| Pages (from-to) | 1117-1126 |
| Number of pages | 10 |
| Journal | Clinical Neurophysiology |
| Volume | 128 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Jul 2017 |
Keywords
- Cortical inhibition
- Cortical reactivity
- Theta burst stimulation (TBS)
- TMS-EEG
- TMS-evoked oscillations
- TMS-evoked potential (TEP)
Cite this
}
Demonstration of short-term plasticity in the dorsolateral prefrontal cortex with theta burst stimulation : A TMS-EEG study. / Chung, Sung Wook; Lewis, Benjamin P.; Rogasch, Nigel C.; Saeki, Takashi; Thomson, Richard H.; Hoy, Kate E.; Bailey, Neil W.; Fitzgerald, Paul B.
In: Clinical Neurophysiology, Vol. 128, No. 7, 01.07.2017, p. 1117-1126.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Demonstration of short-term plasticity in the dorsolateral prefrontal cortex with theta burst stimulation
T2 - A TMS-EEG study
AU - Chung, Sung Wook
AU - Lewis, Benjamin P.
AU - Rogasch, Nigel C.
AU - Saeki, Takashi
AU - Thomson, Richard H.
AU - Hoy, Kate E.
AU - Bailey, Neil W.
AU - Fitzgerald, Paul B.
PY - 2017/7/1
Y1 - 2017/7/1
N2 - Objectives To examine the effects of intermittent TBS (iTBS) and continuous TBS (cTBS) on cortical reactivity in the dorsolateral prefrontal cortex. Methods 10 healthy participants were stimulated with either iTBS, cTBS or sham at F3 electrode. Single- and paired-pulse TMS and concurrent electroencephalography (EEG) were used to assess change in cortical reactivity and long-interval intracortical inhibition (LICI) via TMS-evoked potentials (TEPs) and TMS-evoked oscillations. Results Significant increases in N120 amplitudes (p < 0.01) were observed following iTBS over prefrontal cortex. Changes in TMS-evoked theta oscillations and LICI of theta oscillations were also observed following iTBS (increase) and cTBS (decrease). Change in LICI of theta oscillations correlated with change in N120 amplitude following TBS (r = −0.670, p = 0.001). Conclusions This study provides preliminary evidence that TBS produces direct changes in cortical reactivity in the prefrontal cortex. Combining TBS with TMS-EEG may be a useful approach to optimise stimulation paradigms prior to the conduct of clinical trials. Significance TBS is able to modulate cortical reactivity and cortical inhibition in the prefrontal cortex.
AB - Objectives To examine the effects of intermittent TBS (iTBS) and continuous TBS (cTBS) on cortical reactivity in the dorsolateral prefrontal cortex. Methods 10 healthy participants were stimulated with either iTBS, cTBS or sham at F3 electrode. Single- and paired-pulse TMS and concurrent electroencephalography (EEG) were used to assess change in cortical reactivity and long-interval intracortical inhibition (LICI) via TMS-evoked potentials (TEPs) and TMS-evoked oscillations. Results Significant increases in N120 amplitudes (p < 0.01) were observed following iTBS over prefrontal cortex. Changes in TMS-evoked theta oscillations and LICI of theta oscillations were also observed following iTBS (increase) and cTBS (decrease). Change in LICI of theta oscillations correlated with change in N120 amplitude following TBS (r = −0.670, p = 0.001). Conclusions This study provides preliminary evidence that TBS produces direct changes in cortical reactivity in the prefrontal cortex. Combining TBS with TMS-EEG may be a useful approach to optimise stimulation paradigms prior to the conduct of clinical trials. Significance TBS is able to modulate cortical reactivity and cortical inhibition in the prefrontal cortex.
KW - Cortical inhibition
KW - Cortical reactivity
KW - Theta burst stimulation (TBS)
KW - TMS-EEG
KW - TMS-evoked oscillations
KW - TMS-evoked potential (TEP)
UR - http://www.scopus.com/inward/record.url?scp=85019142291&partnerID=8YFLogxK
U2 - 10.1016/j.clinph.2017.04.005
DO - 10.1016/j.clinph.2017.04.005
M3 - Article
VL - 128
SP - 1117
EP - 1126
JO - Clinical Neurophysiology
JF - Clinical Neurophysiology
SN - 1388-2457
IS - 7
ER -