Question

Look at the impact of alcohol on the human body over a long period of time, in particular pay attention to the central nervous system?

Answer 1

Excessive and prolonged alcohol consumption will adversely affect both the nervous system and the liver.

Explanation:

This is more of a physiological issue and outcome than a psychological one. The psychological issue is more generally related to addition of any kind, and why someone will intentionally pursue a course of action that is detrimental to their health.

Details on the impact of alcohol on the CNS can be found here:
http://sciencenetlinks.com/interactives/alcohol/ebook/pages/central-nervous-system.htm

and here:
https://www.niaaa.nih.gov/alcohol-health/alcohols-effects-body