Pharmaceutical preparations which comprise an alkali metal or alkaline earth metal salt of glycerophosphoryl-O- serine for treating cerebral involutive syndromes, the use of glycerophosphoryl-O-serine and alkali metal or alkaline earth metal salts thereof for producing such preparations, alkali metal or alkaline earth metal salts of glycerolphosphyl-O-serine, and a process for preparing such salts