What is the primary function of motor nerves?

The primary function of motor nerves is to control muscle contractions. Motor nerves are responsible for transmitting signals from the central nervous system (CNS) to various muscles throughout the body, enabling voluntary movements such as walking, picking up objects, and other physical activities. When the brain sends a signal through the motor nerves, it effectively instructs the corresponding muscles to contract or relax, facilitating movement.

Understanding this role is crucial for EMTs, as recognizing how muscle control works can help them assess and respond to injury scenarios, including those involving motor function impairment. This capacity for muscle control is distinct from other types of nerves, like sensory nerves, which are focused on relaying sensory information; autonomic nerves, which regulate involuntary functions like heart rate and digestion; or nociceptive pathways, which transmit pain signals.