def __init__(self):
<EOL>self.membrane_potential      = <NUM_LIT:0.0>;<EOL>self.active_cond_sodium      = <NUM_LIT:0.0>;<EOL>self.inactive_cond_sodium    = <NUM_LIT:0.0>;<EOL>self.active_cond_potassium   = <NUM_LIT:0.0>;<EOL>self.pulse_generation = False;<EOL>self.pulse_generation_time = []<EOL>
!
        @brief Constructor of central element.