PMID- 30881443 OWN - NLM STAT- MEDLINE DCOM- 20190513 LR - 20200309 IS - 1687-5443 (Electronic) IS - 2090-5904 (Print) IS - 1687-5443 (Linking) VI - 2019 DP - 2019 TI - Cortical and Subcortical Contributions to Neuroplasticity after Repetitive Transspinal Stimulation in Humans. PG - 4750768 LID - 10.1155/2019/4750768 [doi] LID - 4750768 AB - The objectives of this study were to establish cortical and subcortical contributions to neuroplasticity induced by noninvasive repetitive transspinal stimulation in human subjects free of any neurological disorder. To meet our objectives, before and after 40 minutes of transspinal stimulation we established changes in tibialis anterior (TA) motor-evoked potentials (MEPs) in response to paired transcranial magnetic stimulation (TMS) pulses at interstimulus intervals (ISIs) consistent with I-wave periodicity. In order to establish to what extent similar actions are exerted at the spinal cord and motor axons, changes in soleus H-reflex and transspinal evoked potential (TEP) amplitude following transspinal and group Ia afferent conditioning stimulation, respectively, were established. After 40 min of transspinal stimulation, the TA MEP consecutive peaks of facilitation produced by paired TMS pulses were significantly decreased supporting for depression of I-waves. Additionally, the soleus H-reflex and ankle TEP depression following transspinal and group Ia afferent conditioning stimulation was potentiated at intervals when both responses interacted at the spinal cord and nerve axons. These findings support the notion that repetitive transspinal stimulation decreases corticocortical inputs onto corticospinal neurons and promotes a surround inhibition in the spinal cord and nerve axons. This novel method may be a suitable neuromodulation tool to alter excitability at cortical and subcortical levels in neurological disorders. FAU - Murray, Lynda M AU - Murray LM AD - Klab4Recovery Research Laboratory, Department of Physical Therapy, College of Staten Island, New York, NY 10314, USA. FAU - Islam, Md Anamul AU - Islam MA AD - Klab4Recovery Research Laboratory, Department of Physical Therapy, College of Staten Island, New York, NY 10314, USA. FAU - Knikou, Maria AU - Knikou M AUID- ORCID: 0000-0002-6277-236X AD - Klab4Recovery Research Laboratory, Department of Physical Therapy, College of Staten Island, New York, NY 10314, USA. AD - PhD Program in Biology and Collaborative Neuroscience Program, Graduate Center of The City University of New York, New York, NY 10016, USA. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190207 PL - United States TA - Neural Plast JT - Neural plasticity JID - 100883417 SB - IM MH - Adult MH - Cerebral Cortex/*physiology MH - Electric Stimulation MH - Evoked Potentials, Motor/physiology MH - Female MH - Humans MH - Male MH - Middle Aged MH - Motor Cortex/physiology MH - Neuronal Plasticity/*physiology MH - Neurons/*physiology MH - Spinal Cord/*physiology MH - Young Adult PMC - PMC6383395 EDAT- 2019/03/19 06:00 MHDA- 2019/05/14 06:00 PMCR- 2019/02/07 CRDT- 2019/03/19 06:00 PHST- 2018/08/23 00:00 [received] PHST- 2018/10/26 00:00 [revised] PHST- 2018/12/17 00:00 [accepted] PHST- 2019/03/19 06:00 [entrez] PHST- 2019/03/19 06:00 [pubmed] PHST- 2019/05/14 06:00 [medline] PHST- 2019/02/07 00:00 [pmc-release] AID - 10.1155/2019/4750768 [doi] PST - epublish SO - Neural Plast. 2019 Feb 7;2019:4750768. doi: 10.1155/2019/4750768. eCollection 2019.