The right side of your cerebellum controls coordination on the right side of your body; the left side of your cerebellum controls coordination on the left. Diseases that damage the spinal cord and peripheral nerves that connect your cerebellum to your muscles also can cause ataxia. Ataxia causes include: Head trauma. Damage to your brain or spinal cord from a blow to your head, such as might occur in a car accident can cause acute cerebellar ataxia, which comes on suddenly. Stroke. When the blood supply to a part of your brain is interrupted or severely reduced, depriving brain tissue of oxygen and nutrients, brain cells die.
A polar bear has one of the best noses in the entire world and are well known to have an incredible sense of smell. Polar bears have been seen walking in a straight line for 32km (20 miles) to food, with only their nose to guide them. Polar bears have also sniffed out a seal ten football fields away that was hidden under 1m (3') of ice.
The bear's heart will slow from 60 to 100 beats a minute down to 20 to 40 beats or even fewer. Instead of its usual 15 to 20 breaths per minute, a hibernating bear may take one deep breath every 45 seconds. Not all American black bears are black. Some are dark brown. Cinnamon colored bears are common west of the Mississippi River. Some people think bears smell bad, but bear expert Dr. Lynn Rogers says the most common bear odor is clean and pleasant, even after six months in a den. A black bear has round ears, small eyes, and a long snout.