1 Pick a starting location and draw the first vector to scale in the indicated direction. Label the magnitude and direction of the scale on the diagram (e.g., SCALE: 1 cm = 20 m).  Starting from where the head of the first vector ends, draw the second vector to scale in the indicated direction.
brain transmit messages to the body using neurons and spinal cord. ... Motor neurons carry messages away from the brain and back to the rest of the body. the central neurons sâ¦ystem does many jobs at the same time. It controls all voluntary movement, such as speech and walking, and involuntary movements like blinking and breathing.
The L4 nerve is located in the lower back. Photo Credit Comstock Images/Comstock/Getty Images. Your spinal cord is the long bundle of nervous tissue and bones that relay messages between your brain and body. Nearly all muscular movement in the body is facilitated by these messages carried by the nerve cells. A severe injury to the spinal cord can therefore greatly hamper movement or prevent it altogether. In the lower body, it may prevent walking, swimming and all other types of movements performed with the legs.