Labels:bulletin board | plant | sky | subarachnoid space OCR: BRAIN. WAVE ACTIVITY HE LEVEL OF ACTIVITY instruments to a sleeping inside your brain can be person' head. scientists study m easured to reveal the different the brain' electrical signals. phases making up a night's When you are aw ake o sleep By attaching measuring dreaming the signals are intense ELECTRICAL SIGNALS Brain Electrical signals indicating brain activity Awake Deep KD ream Sleep control Spinal sleep sleep centre cord Dream contro lcord
