Cutaneous Silent Period Modulation in Upper-Limb Muscles During Whole-Body Instability

Encompassing electrophysiological measurements from 10 healthy individuals performing elbow extension under seated, standing, and unstable wobble board conditions. It quantifies the cutaneous silent period (CSP) and excitatory responses (E1, E2) in the triceps brachii muscle, expressed as percent change from baseline and individual durations. The data was collected to examine how whole-body instability modulates reflex inhibition in the upper limb.

Use Cases

• Analyze the percent change in CSP suppression in the triceps brachii across seated, standing, and wobble board tasks to study task-dependent reflex modulation.
• Model the relationship between CSP duration and whole-body instability level using the quantified inhibitory response durations.
• Compare the first excitatory response (E1) and second excitatory response (E2) amplitudes as a percent of baseline to understand the triphasic reflex pattern under instability.
• Investigate the correlation between background elbow extension contraction level (~5% MVC) and the magnitude of cutaneous afferent inhibition measured as CSP.

Strengths

• Data from 10 healthy human participants provides a controlled physiological sample.
• Includes quantified measures for three distinct reflex components: E1, CSP, and E2, with both amplitude (percent change) and duration metrics.
• Compares three experimental conditions (seated, standing, wobble board) to isolate the effect of whole-body instability.

Limitations

• Small sample size of 10 individuals limits statistical power and generalizability of findings.
• Data is restricted to a single muscle (triceps brachii) and digit stimulation site (digit II of the right hand), limiting analysis of broader neuromuscular adaptations.
• Lacks detailed demographic or anthropometric data for participants, preventing analysis of covariates.

Provenance

Source

Nathaniel R. Eckert

Collection Method

Experimental data collected via cutaneous electrical stimulation of digit II during maintained elbow extension, with EMG recordings from the triceps brachii.

Freshness

2020-06-24