[The influence of contralateral acoustic stimulation on the summating potential in the human cochlea (author's...

In registering stimulus-related potentials from the promontory in man one frequently finds so-called positive or negative summating potentials (SP). These SP's are influenced by acoustically induced activity in the crossed olivocochlear bundle (COCB): COCB activity causes a negativation of the SP. A tentative explanation will be given.