Report Abuse. 1  For the best answers, search on this site https://shorturl.im/aw2eZ. 2  I think that the average person can walk a mile in 20 minutes. 3  I walk a mile in 16min....I'm 63yrs old...I do walk rather fast....I average 2.6hours to walk 10 miles....I do that everyday....lol.  20 to 30 minutes.
When cataplexy is present, the cause is most often the discrete loss of brain cells that produce hypocretin. Although the reason for such cell loss remains unknown, it appears to be autoimmune in nature (an autoimmune disorder is when the bodyâs immune system mistakenly attacks healthy cells or tissue).
The cause of narcolepsy is not known; however, scientists have made progress toward identifying genes strongly associated with the disorder. These genes control the production of chemicals in the brain that may signal sleep and awake cycles. Some experts think narcolepsy may be due to a deficiency in the production of a chemical called hypocretin by the brain.