Claustrophobic

Claustrophobia
Getting caught in a small hole , due to cave-ins or suddenly encountering a dangerous animal's den and being unable to defend oneself or retreat, could have caused claustrophobia to become a prepared phobia.
Classification and external resources
Specialty	Psychiatry
ICD-10	F40.2
ICD-9-CM	300.29
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Claustrophobia is the fear of being enclosed in a small space or room and having no escape. It can be triggered by many situations or stimuli, including elevators crowded to capacity, windowless rooms, and even tight-necked clothing. It is typically classified as an anxiety disorder, which often results in panic attacks. The onset of claustrophobia has been attributed to many factors, including a reduction in the size of the amygdala, classical conditioning, or a genetic predisposition to fear small spaces.

One study indicates that anywhere from 5–7% of the world population is affected by severe claustrophobia, but only a small percentage of these people receive some kind of treatment for the disorder.

The term claustrophobia comes from Latin claustrum "a shut in place" and Greek φόβος, phóbos, "fear".

Claustrophobia is typically thought to have two key symptoms: fear of restriction and fear of suffocation. A typical claustrophobic will fear restriction in at least one, if not several, of the following areas: small rooms, locked rooms, cars, airplanes, trains, tunnels, underwater caves, cellars, elevators and caves. Additionally, the fear of restriction can cause some claustrophobia to fear trivial matters such as sitting in a haircutter's chair or waiting in line at a grocery store simply out of a fear of confinement to a single space. Another possible site for claustrophobic attacks is a dentist's chair, particularly during dental surgery; in that scenario, the fear is not of pain, but of being confined.

Often, when confined to an area, claustrophobics begin to fear suffocation, believing that there may be a lack of air in the area to which they are confined.

Claustrophobia is the fear of having no escape, and being closed in to a small space. It is typically classified as an anxiety disorder and often times results in a rather severe panic attack. It is also confused sometimes with Cleithrophobia (the fear of being trapped).

This method was developed in 1979 by interpreting the files of patients diagnosed with claustrophobia and by reading various scientific articles about the diagnosis of the disorder. Once an initial scale was developed, it was tested and sharpened by several experts in the field. Today, it consists of 20 questions that determine anxiety levels and desire to avoid certain situations. Several studies have proved this scale to be effective in claustrophobia diagnosis.

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Wikipedia