Transcranial magnetic stimulation and volitional quadriceps activation.

Area of Science:

• Neurology
• Orthopedics
• Sports Medicine

Background:

• Quadriceps activation deficits are common following meniscectomy.
• Transcranial magnetic stimulation (TMS) is being explored as a method to improve muscle activation in these patients.

Purpose of the Study:

• To investigate the impact of single-pulsed TMS on the quadriceps central activation ratio (CAR) in individuals who have undergone meniscectomy.
• To assess changes in quadriceps activation following TMS intervention.

Main Methods:

• A randomized controlled trial was conducted in a university laboratory setting.
• Twenty participants with partial meniscectomy and CAR < 85% were randomized into TMS or control groups.
• Quadriceps activation was measured using CAR at baseline and at 0, 10, 30, and 60 minutes post-intervention.

Main Results:

• No statistically significant differences in CAR were observed between the TMS and control groups over the 60-minute period.
• However, moderate to strong effect sizes for CAR were noted at 10 and 60 minutes in the TMS group compared to baseline.
• These findings suggest a potential for increased quadriceps activation following TMS.

Conclusions:

• Single-pulsed TMS did not result in significant group differences in CAR within 60 minutes post-intervention.
• Despite the lack of significant group differences, observed effect sizes indicate a positive trend in quadriceps activation with TMS.
• Further research may explore optimal TMS parameters for enhancing quadriceps function post-meniscectomy.