What is the primary function of sensory nerve fibers?

The primary function of sensory nerve fibers is to transmit sensory information from the periphery to the central nervous system. These fibers are responsible for carrying signals related to various sensations such as touch, temperature, pain, and proprioception from receptors in the skin, muscles, and other tissues. Once these signals reach the central nervous system, they are processed and interpreted, allowing the body to respond appropriately to different stimuli. This is a crucial aspect of how we perceive and interact with our environment, making sensory nerve fibers essential for sensory processing and awareness.

The other options refer to functions that do not pertain specifically to sensory nerve fibers. Controlling muscle movement is the role of motor nerve fibers, while connecting the brain to the heart primarily involves autonomic nerves rather than sensory fibers. Providing blood supply to nerves is related to vascular function and is not a direct responsibility of nerve fibers themselves.