research suggests that parvalbumin-positive neurons in the medial septum are involved in the formation of hippocampal-dependent spatial memory. the medial septum is also implicated in various other brain functions, including sensorimotor gating, consciousness, and the modulation of psychosis-related behaviors. the specific roles of different types of neurons in the medial septum, such as gabaergic and parvalbumin-positive cells, are being studied for their potential connections to learning, memory, and brain disorders.