What is the primary function of the genitofemoral nerve?

The genitofemoral nerve is primarily responsible for providing sensory innervation to the scrotum in males and the labia majora in females. It originates from the lumbar plexus, specifically from the L1 and L2 spinal nerves. Its function is primarily sensory in the context of the scrotum, contributing to the sensation of touch, temperature, and pain in this area.

While the nerve does have a genital branch that innervates these regions, it also carries autonomic fibers that can influence perspiration and other reflexes, but the main described function in relation to this question is its sensory role. This distinction is important for understanding how the genitofemoral nerve contributes to sensations in the genital region.

The other choices focus on motor innervation, leg movement, or blood flow regulation, which are not primary functions of the genitofemoral nerve, thus clarifying its specific role in the body.