Fear of the dark is a common fear or phobia among Toddler, and, to a varying degree, adults. A fear of the dark does not always concern darkness itself; it can also be a fear of possible or imagined dangers concealed by darkness. Most toddlers and children outgrow it, but this fear persists for some as a phobia and anxiety. When waking up or sleeping, these fears may intertwine with sighting sleep paralysis demons in some people. Some degree of fear of the dark is natural, especially as a phase of child development. Most observers report that fear of the dark rarely appears before the age of two years and roughly peaks around the development stage of four years of age.] When fear of the dark reaches a degree that is severe enough to be considered pathological, it is sometimes called scotophobia (from σκότος – "darkness"), or lygophobia (from λυγή – "twilight").
Some researchers, beginning with Sigmund Freud, consider the fear of the dark to be a manifestation of separation anxiety disorder.
An alternate theory was posited in the 1960s, when scientists conducted experiments in a search for responsible for memory. In one experiment, , normally Nocturnality, were conditioned to fear the dark and a substance called "scotophobin" was supposedly extracted from the rats' brains; this substance was claimed to be responsible for remembering this fear. These findings were subsequently debunked.
Nyctophobia may also be tied to Nocturnality, whether fictional or real. For instance, someone who experiences sanguivoriphobia, a fear of , might also experience nyctophobia due to an association with vampires. Similarly, someone with chiroptophobia, or fear of , might also likewise have nyctophobia due to their association with the night or dark spaces.
Exposure therapy can be very effective when exposing the person to darkness. With this method a therapist can help with relaxation strategies such as meditation. Another form of therapy is cognitive behavioural therapy. Therapists can help guide patients with behavior routines that are performed daily and nightly to reduce the symptoms associated with nyctophobia. In severe cases, anti-depressants and anti-anxiety medication drugs can be effective to those dealing with symptoms that may not be manageable if therapy could not reduce the symptoms of nyctophobia.
Despite its pervasive nature, there has been a lack of etiology research on the subject. Nyctophobia is generally observed in children but, according to J. Adrian Williams' article "Indirect Hypnotic Therapy of Nyctophobia: A Case Report", many clinics with pediatric patients have a great chance of having adults who have nyctophobia. The same article states that "the phobia has been known to be extremely disruptive to adult patients and... incapacitating".Mikulas, William L. "Behavioral Bibliotherapy and Games for Treating Fear of the Dark." Child & Family Behavior Therapy 7.3 (1985): 1-7.
The word nyctophobia comes from the Greek language νυκτός, nyktos, genitive of νύξ, nyx, "night" νύξ, Henry George Liddell, Robert Scott, A Greek-English Lexicon, on Perseus and φόβος, phobos, "fear". φόβος, Henry George Liddell, Robert Scott, A Greek-English Lexicon, on Perseus
Other names have been put forth for this specific phobia, such as achluophobia (from greek , akhlús, meaning "mist" or "darkness", and φόβος, phobos, meaning "fear"), as well as lygophobia (from Greek λυγή, lygos, meaning "twilight", and φόβος, phobos, meaning "fear")
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