Acrophobia: Acrophobia is a fairly common phobia. It is defined as the extreme or irrational fear of heights. It belongs to a category of specific phobias, called
space and motion discomfort. Many people experience a degree of natural fear when they are exposed to height but when people that have acrophobia are
placed on an elevated surface (perhaps only 2 feet), they experience extreme discomfort and/or anxiety attacks. Those with this disorder in fearful
situations can become so terrified that they cannot remove themselves. About two to five percent of the population is affected by acrophobia, with about
twice the number of women affected than men. Acrophobia is believed to be caused by conditioning that associates traumatic events with heights. A rational
fear of heights is evolutionary, as experiments have shown that a fear of heights is innate by infants reluctant to crawl on a glass floor.
external image 83354f427f3479d0ecf2b6eb6bd52268.jpg?ba4058
http://www.zimbio.com/Stop+Your+Panic+Attacks/articles/Xcq-Myl4lCd/Acrophobia+Fear+Heights+Experienced

Deviant: It is considered strange behavior when someone panics while they are on a ladder or a balcony or when they refuse to do these things because they want to being subjected to heights. It is not normal to be afraid of heights to such extreme measures such as acrophobia, a normal fear of slightly high elevations normally, may cause worry. However, excess worry is a sign of acrophobia.
Distressful- Being in an elevated space causes an acrophobia person to become distressful because they begin to panic and might feel nauseous or dizzy.
Dysfunctional- It interferes with everyday life because one may avoid certain everyday situations or experiences because of their fear of heights. This can include, refusal to go up stairs, in elevators or general areas higher than the ground. This can be treated but if the general fear of hieghts prevents an individual from going about their daily life then they should seek help.
Dangerous: If an acrophobia is put in a situation that stimulates a panic attack it could put them in danger of getting down from the high up place safely and the unnecessary worry concerning heights can take a toll on the immune system as well as effect an individual's state of mind.

Causes:
Conditioning or a traumatic experience involving heights
Inborn; evolved adaptation
Dysfunction in maintaining balance

Symptoms:
Panic attacks,
Increased heart rate,
Uncomfortable breathing,
Discomfort,
Nausea,
Dizziness or vertigo.

Treatment: Cognitive-behavioral therapy (CBT)- puts the person with the phobia in the situation that they fear. Systematic desensitization is when therapists gradually increase exposure to the fear. It associates the fear with a relaxed environment, and the goal is to eventually get the person to be relaxed when they are at higher elevations. One way they do this is using virtual reality, shown below.


http://www.youtube.com/watch?v=SinlgK5Q4v4
http://books.google.com/books?id=8IRpqOE-GuoC&pg=PA5&lpg=PA5&dq=abnormal+psych+deviant+distressful+dysfunctional&source=bl&ots=KOUv01qv0s&sig=8jTCerDiEOyXmtYSU9a5_ju7Kuc&hl=en&ei=CKqHTcb3H82KrQHp7eyzBg&sa=X&oi=book_result&ct=result&resnum=2&ved=0CBsQ6AEwAQ#v=onepage&q=abnormal%20psych%20deviant%20distressful%20dysfunctional&f=false
http://myanxietyattacks.com/anxiety-disorders/phobias-fears/arachnophobia

https://en.wikipedia.org/wiki/Acrophobia

http://www.allaboutcounseling.com/library/acrophobia/