Two novel short-interval intracortical inhibition (SICI) protocols, assessing SICI across a range of interstimulus intervals (ISIs) using either parallel threshold-tracking transcranial magnetic stimulation (TT-TMS) or automated conventional TMS (cTMS), were recently introduced. However, the test-retest reliability of these protocols has not been investigated, which is important if they are to be introduced in the clinic. SICI was recorded in 18 healthy subjects using TT-TMS (T-SICI) and cTMS (A-SICI). All subjects were examined at four identical sessions, i.e., morning and afternoon sessions on 2 d, 5-7 d apart. Both SICI protocols were performed twice at each session by the same observer. In one of the sessions, another observer performed additional examinations. Neither intraobserver nor interobserver measures of SICI differed significantly between examinations, except for T-SICI at ISI 3 ms ( = 0.00035) and A-SICI at ISI 2.5 ms ( = 0.0103). Intraday reliability was poor-to-good for A-SICI and moderate-to-good for T-SICI. Interday and interobserver reliabilities of T-SICI and A-SICI were moderate-to-good. Although between-subject variation constituted most of the total variation, SICI repeatability in an individual subject was poor. The two SICI protocols showed no considerable systematic bias across sessions and had a comparable test-retest reliability profile. Findings from the present study suggest that both SICI protocols may be reliably and reproducibly employed in research studies, but should be used with caution for individual decision-making in clinical settings. Studies exploring reliability in patient cohorts are warranted to investigate the clinical utility of these two SICI protocols.
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http://dx.doi.org/10.1523/ENEURO.0103-21.2021 | DOI Listing |
Clin Neurophysiol
December 2024
Neuroscience Research Australia, 139 Barker Street, Randwick, 2031, Sydney, Australia; University of NSW and Department of Neurology, Prince of Wales Hospital, South Eastern Sydney Area Health Service, Sydney, Australia.
Objective: Assessment of cortical function with threshold tracking transcranial magnetic stimulation (TT-TMS) has developed as a biomarker to inform disease pathophysiology, particularly in neurodegenerative disease and dementia. At present, a fully integrated testing system does not exist. To advance clinical utility, and to streamline software design to integrate with diagnostic approaches in an outpatient setting, the present series of studies assessed the effects of altering diagnostic paradigms to measure interstimulus interval (ISI) including serial ascending [T-SICIs] and parallel [T-SICIp] methodologies as measures of cortical motor function (the MagXite software).
View Article and Find Full Text PDFG Ital Cardiol (Rome)
November 2024
U.O. Cardiologia, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Policlinico di Sant'Orsola, Bologna.
Pulmonary embolism (PE) is commonly treated primarily with pharmacological therapy, while advanced reperfusion therapies (transcatheter or surgical) are considered only in cases of contraindications or failure of standard therapies. Treatment algorithms vary depending on the patient's risk, with patients at intermediate or high risk potentially requiring evaluation for such advanced reperfusion therapies. Critical scenarios, such as contraindications to systemic thrombolysis or failure of pharmacological protocols, necessitate the activation of a multidisciplinary pulmonary embolism response team (PERT) and prompt therapeutic escalation.
View Article and Find Full Text PDFNeurorehabil Neural Repair
October 2024
Department of Neurology, Emory University, School of Medicine, Atlanta, GA, USA.
Background: Low-frequency repetitive transcranial magnetic stimulation (LF-rTMS) protocols targeting primary motor cortex (M1) are used in rehabilitation of neurological diseases for their therapeutic potential, safety, and tolerability. Although lower intensity LF-rTMS can modulate M1 neurophysiology, results are variable, and a systematic assessment of its dose effect is lacking.
Objectives: To determine the dose-response of LF-rTMS on stimulated and non-stimulated M1.
Clin Neurophysiol
December 2024
Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil.
Exp Brain Res
December 2024
Neuromodulation Center, Center for Clinical Research Learning, Spaulding Rehabilitation Hospital, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
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