Balto-Slavic Accentual Mobility

Why does the accent jump back and forth in Russian words like golová ''head'', acc. gólovu, gen. golový, dat. golové etc.? How come we find similar alternations in other Slavic languages and in a Baltic language like Lithuanian?

The quest for the origin of the so-called "mobile accent paradigms" of Baltic and Slavic leads the reader through other Indo-European language branches such as Indo-Iran...