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A new method to determine stretch reflex latency
(WILEY, 111 RIVER ST, HOBOKEN 07030-5774, NJ, 2021) Topkara, Betilay; Aydın, Tuğba; Çorum, Mustafa; Karaoğlu, Ayşe; Ekici Zincirci, Dilara; Buğdaycı, Derya S.; Öneş, Kadriye; Paker, Nurdan; Kesiktaş, Nur; Karacan, İlhan; Türker, Kemal Sıtkı
Introduction/Aims: Motion artifact signals (MASs) created by the relative movement of intramuscular wire electrodes are an indicator of the mechanical stimulus arrival time to the muscle belly. This study proposes a method that uses wire electrodes as an intramuscular mechanosensor to determine the stretch reflex (SR) latency without lag time. Methods: Gastrocnemius SR was induced by tendon tap, heel tap, and forefoot tap. The MASs recorded by intramuscular wire electrodes were extracted from background electromyographic activity using the spike-triggered averaging technique. Simultaneous recordings were obtained from multiple sites to validate the MAS technique. Results: Using intramuscular wire electrodes, the MASs were successfully determined and extracted for all stimulus sites. In the records from the rectus femoris, MASs were also successfully extracted; thus, the reflex latency could be calculated. Discussion: Wire electrodes can be used as an intramuscular mechanosensor to determine the mechanical stimulus arrival time to the muscle belly.