Without visual feedback voluntary torque is overestimated during muscle potentiation despite similar motor unit firing rate and perception of exertion.

• Tác giả: Charles L Rice, Alexander M Zero
• Ngôn ngữ: eng
• Ký hiệu phân loại: 809.008 History and description with respect to kinds of persons
• Thông tin xuất bản: United States : Journal of neurophysiology , 2025
• Bộ sưu tập: NCBI
• ID: 641684

Tóm tắt

The purpose was to assess whether visual feedback of torque contributes to motor unit (MU) firing rate reduction observed during postactivation potentiation (PAP) of skeletal muscle. From 15 participants 23 MUs were recorded with intramuscular fine-wire electrodes from the tibialis anterior during isometric dorsiflexion contractions at 20% of maximum, with and without both PAP and visual feedback of torque. A 5-s maximal voluntary contraction (MVC) was used to induce PAP, and evoked twitch responses were assessed before and after. After the MVC twitch torque was 188% of baseline (