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Related Concept Videos

Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...

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Related Experiment Video

Updated: May 8, 2026

Effects of Transcranial Alternating Current Stimulation on the Primary Motor Cortex by Online Combined Approach with Transcranial Magnetic Stimulation
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Published on: September 23, 2017

Continuous theta-burst stimulation modulates tactile synchronization.

Kevin Gh Lee1, Mark F Jacobs, Michael J Asmussen

  • 1Department of Kinesiology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada. nelsonaj@mcmaster.ca.

BMC Neuroscience
|August 24, 2013
PubMed
Summary
This summary is machine-generated.

Continuous theta-burst repetitive TMS (cTBS) temporarily reduces the impact of conditioning stimuli on temporal order judgment (TOJ). This suggests cTBS can modulate inhibitory networks involved in sensory processing.

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Area of Science:

  • Neuroscience
  • Somatosensory Perception
  • Neurostimulation

Background:

  • Temporal order judgment (TOJ) assesses stimulus sequence detection.
  • Synchronized conditioning stimuli impair TOJ, potentially via GABAergic interneurons causing perceptual binding.
  • Continuous theta-burst repetitive TMS (cTBS) over somatosensory cortex (SI) modifies tactile perception.

Purpose of the Study:

  • To investigate TOJ perception with and without conditioning stimuli.
  • To assess the effects of cTBS on left SI on TOJ performance.

Main Methods:

  • TOJ task administered on index and middle fingers (D2 and D3).
  • Sessions conducted with and without a background sinusoidal vibration (conditioning stimuli).
  • cTBS applied over left SI before TOJ assessment.

Main Results:

  • cTBS reduced conditioning stimuli's impact on TOJ for up to 18 minutes.
  • Sham cTBS had no effect on TOJ performance.
  • TOJ in the absence of conditioning stimuli remained unaltered post-cTBS.

Conclusions:

  • cTBS suppresses inhibitory networks in SI mediating perceptual binding during TOJ synchronization.
  • cTBS may benefit clinical populations with altered inhibitory cortical circuits.
  • TOJ with conditioning stimuli could assess sensory processing in neurological impairment.