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.
Dogs can drop/lower their ears when they are both happy and nervous. Itâs important to read the rest of the dog. I prefer to call ears, âdroppedâ when the dog is offering pro social behavior, like our dog below. You can see our dog is offering a lovely kiss to his friendâs face. His body is likely wiggly and loose.eutral position means that they are not pricked forward, drooping down or pasted to his head. Whatever the dogâs breed, they are just sitting easy. Here is a relaxed dog with neutral ears. The other body language that tells me this dog is relaxed is the big open mouth and relaxed, drooping tongue.