The part of the nervous system responsible for ejaculation is the while the system is responsible for erection.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

about 40,000,000 results (0.81 seconds)  

search results

what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.