A man in his 70s drives himself to the ER emergency room bec…

A man in his 70s drives himself to the ER emergency room because he has pain in his shoulder and down the medial side (inside) of his left arm.  Though the pain feels like it is related to the skin, the man and his ER doctors are worried that it may be more serious because … 

A constable pulls over a car in which a young person was dri…

A constable pulls over a car in which a young person was driving erratically.  The officer smells alcohol on the driver’s breath.  He asks the young man to leave the car and performs a Field Sobriety Test.  He has the young man walk along a line, and stand on one foot.  The alcohol-sensitive part of the brain which is being tested most is the ___________.