Effects of antisera to S-100 protein and to synaptic membrane fraction on maze performance and EEG.

Topical cortical injection into rats of antiserum to the synaptic membrane fraction caused recurrent spiking activity as observed in the EEG; neither antiserum to S-100 protein nor antiserum to myelin caused any such abnormality. These same rats, when observed on a maze learning task (Lashley III) responded differently to the different antisera. Rats receiving injections of antiserum to the synaptic membrane fraction or antiserum to S-100 protein were inhibited in their performance, while rats injected with antiserum to myelin behaved like uninjected animals.