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.
Answer Wiki. A dog can walk in circles to make a bed comfortable to sleep in (this should be just a few circles before laying down) but this can also be a sign of a neurologic condition. It is impossible to tell whether this is normal for the dog or not without a thorough neurologic examination by a veterinarian. Views.