Wearable muscle activity sensor and electrode

A muscle activity sensor comprising:

• a base textile configured to apply a compression force against a dermal surface of a user, the base textile having a dermal side and an external side;
• an electrode coupled to the base textile and configured to receive electrical signals associated with muscle activity of the user and output the electrical signals as an output signal;
• an interconnect coupled to the base textile over a distance from the electrode to an interconnect junction contact such that the interconnect moves with the base textile as the user moves, the interconnect being configured to deliver the output signal from the electrode to the interconnect junction contact;
• and
• a tab assembly configured to electrically connect the interconnect junction to a circuit board socket,
• wherein the tab assembly comprises a conductive element affixed to a support layer, the conductive element being electrically connected to the interconnect junction contact, the support layer and the conductive element forming an extension portion that extends over the base textile with a gap between the conductive element and the base textile such that the conductive element and the support layer form a plug configured to engage with the circuit board socket,
• wherein the electrode is a first electrode and the interconnect is a first interconnect;
• wherein the muscle activity sensor further comprises a second electrode and a second interconnect,
• wherein the first electrode and the second electrode are positioned to receive the electrical signals associated with muscle activity of a common muscle, and
• wherein the first interconnect and the second interconnect comprise respective portions that are formed as a twisted pair that transition through vias between the dermal side and the external side of the base textile.