REGIONAL CEREBRAL BLOOD FLOW (RCBF RCBF): Regional cerebral blood flow monitoring may help boost the validity of the regional localization theory, in which specific parts of the brain control specific functions.. measure of the blood flow in a specific area of the brain, using positron emission tomography (PET scans) and/or single photon emission computed tomography.
If a dog goes on his back to you he is accepting you as his master. This is part of the answer but here's a little more in-depth version as reported by USA Today. In general, dogs lie on their back for three reasons.
Getting a dog in your dream can mean that you are lonely and need to find more friends. If you are part of a pack of dogs in your dream it could be that you are searching to belong and may mean that you need to reconnect with your family. Rubbing the belly of a dog symbolizes a relationship in which you feel at ease and totally trust the other person. Puppies represent your ability to nurture.