Ch.6 Nervous System

Which of the following would not be a reasonable use for burr holes? 

A lumbar puncture was done on a patient suffering from bradykinesia, tremors, long bouts of depression and fatigue. The cerebrospinal fluid collected shows a decrease in white blood cell count and a significantly reduced dopamine level. Based on their analysis the patient suffers from which of the following disorders? 

What is the primary role of endorphins in the human body?