Cerebral blood flow (CBF) is the blood supply to the brain in a given period of time.In an adult, CBF is typically 750 millilitres per minute or 15% of the cardiac output.This equates to an average perfusion of 50 to 54 millilitres of blood per 100 grams of brain tissue per minute. CBF is tightly regulated to meet the brain's metabolic demands.oo little blood flow (ischemia) results if blood flow to the brain is below 18 to 20 ml per 100 g per minute, and tissue death occurs if flow dips below 8 to 10 ml per 100 g per minute.
Ears back often means the dog is being submissive or even a little fearful. The situation you describe sounds like a dog that is trying to appease you. You are a little scary to her. Try approaching her sideways, in a crouched position rather than hovering over her.
A snap is a warning. It communicates that your dog is feeling threatened, possessive or irritated, or that something you just did hurt him. You were not bitten because the dog does not want to bite. It's important to respect the warning and determine what provoked it.f your pal snaps when you try to clean his ears, he may need to see his vet for treatment of an ear infection. An emotionally stressed dog -- for instance, a dog in a tense encounter situation -- may snap at anyone who comes close to him. Small children may pull a dog's tail once too often and earn a warning snap.