Figure 1
From: Myofascial trigger points and innervation zone locations in upper trapezius muscles
Experimental setup. Subjects sat in a custom made chair with a load cell connected to the right handle and were connected to an electrode matrix (model ELSCH064, designed by LISiN at Politecnico di Torino and manufactured by OT Bioelectronica, Torino, Italy) placed on the upper trapezius. They viewed the visual feedback device (MISO II, LISiN, OT Bioelettronica, Torino, Italy) during the experiment.