Table 3.

Muscles identified as showing long-lasting involuntary activation during the relaxation part of BMCA and their firing pattern

	First Ax		Second Ax		Third Ax		Fourth Ax
P	IFP	RFP	IFP	RFP	IFP	RFP	IFP	RFP
1	LOP	LPM	RT, LOP	LPM, RA	LOP	LPM, RA	LOP	LPM, RA
2	RWF, LOP	LPM, RA	RWE, ROP	LPM, RA	RT, LB	RPM, LPM, RA	–	RWE, LPM, RA
3	RB, RWE, LB	RPM, LPM	Not assessed		Not assessed		Not assessed
4	LPM, RA		LPM		LPM
5	RB, RWF, LB	LPM, RA	LT	LPM, RPM	RWF	RPM, LPM, RA	ROP	RPM, LPM
6	ROP	LPM, RA	ROP, LOP	LPM	ROP, LOP	LPM, RA	ROP, LOP	LPM
7	RPM, LPM	–	RB, RT, RPM, LB, LT, LWF, LPM	–	RT, LWF	RPM, LPM, RA	RT, RWF, LWF LPM	–
8	LT, LWF, LPM	–	RWE	LPM, RA	RWE, ROP	RPM, LPM, RA	Not assessed
9	RWF, LWF	RPM, LOP, LPM, RA	Not assessed		Not assessed		Not assessed

P: participant; RB: right biceps; RT: right triceps; RWF: right wrist flexors; RWE: right wrist extensors; ROP: right opponens pollicis; RPM: right pectoralis major; LB: left biceps; LT: left triceps; LWF: left wrist flexors; LWE: left wrist extensors; LOP: left opponens pollicis; LPM: left pectoralis major. RA: rectus abdominis; IFP: irregular firing pattern; RFP: regular firing pattern.