well, not exactly, you have to name them accordingly, like this:

j_neck
j_chest
j_lumbar
j_abs
j_l_pecs
j_r_pecs
j_l_shoulder
j_r_shoulder
j_l_elbow
j_r_elbow
j_l_wrist
j_r_wrist
j_l_glute
j_r_glute
j_l_hip
j_r_hip
j_l_knee
j_r_knee
j_l_ankle
j_r_ankle