Master's in Sexology and Psychosexual Counseling. For More Info WhatsApp- 9604715783/9359863878. Neural Mechanism of Sex The sex center is in the limbic system near Hypothalamus in the brain. The brain receives sensory signals and transmits messages to the muscles and blood vessels. The sensory messages must be adequate to arouse sexually and produce an erection. The sensory pathways especially from the five special senses-touch, sight, hearing, smell and teste – play an important role in the sexual arousal.