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.
It may also be from a foreign object that has become lodged in the nose. If your dog has a middle ear disease, it may decrease the normal secretions and cause the animal to secrete an abnormal amount of mucus. Remember that it is normal for your dog to sneeze and have a nasal discharge, just as it is for humans. It is only when it becomes severe or chronic that you need to become concerned.