PDF Publication Title:
Text from PDF Page: 023
2 LITTERATURE REVIEW 2.5 Blindness and circadian rhythm Totally blind people often have free-running circadian rhythms that are not entrained to the 24-hr day/night cycle. In these blind free-runners (BFRs), circadian phase drifts each day, causing recurrent insomnia. Properly admin- istered melatonin can advance the circadian rhythms of BFRs, and most of them can be entrained to the 24-hour day/night cycle. (Czeisler et al., 1995) 2.6 (Artificial) Light in psychiatric treatment The term “Light therapy” is used in this thesis as an umbrella for the differ- ent variations of artificial healing light: Bright Light Therapy (BLT), Blue Light Peaks (BLP), CL, Sensory Lighting for Therapy, Seasonal Light Schemes etc. This does not include daylight or dynamical daylight sensors. 2.6.1 Bright Light therapy BLT has been known in psychiatric treatment for the longest time, earlier known as phototherapy or heliotherapy. It can be prescribed by a doctor or psychiatrist and consist of a light box mimicking the bright light of day. Using full-spectrum light, polychromatic polarised light or using only specific wavelengths can create the desired light. A prescription can dictate a certain time of day, like morning or evening and a specific timeframe for looking into the light box. Both sunlight and bright artificial light can suppress human melatonin segregation, so BLT is like sitting in the sun and works by mimick- ing the sunlight that strikes the retina in the eye. (Parry and Maurer, 2003) (Krysta et al., 2012) BLT is frequently used to treat seasonal affective disorder (SAD), a type of depression that occurs at the same time each year, generally in the fall or winter when there are fewer hours of daylight. It can also be used to treat other types of depression as well as various sleep disorders by phase shift- ing for advanced or delayed circadian phase. The effect of BLT on depres- sion shows more significant results in seasonal than non-seasonal depres- sion. The dose of BLT is usually 10000lx for a period of 30min or 2500lx for a period of 2 hours. (Tonello et al., no date; Wetterberg, 1990; Blouin et al., 1996; Terman et al., 2001; Baxendale, O’Sullivan and Heaney, 2013; Jurvelin et al., 2014) 10000lx are equivalent to the natural light approximately 45min after sunrise. Side effects are rare but include eyestrain or visual disturbances, head- aches, agitation or a strange feeling, nausea, and sweating. These side ef- fects are generally reversible by decreasing the duration of time one spends exposed to the lights. In a case with young pupils in an elementary school in Master thesis · MSc Lighting Design · Pernille Bech-Larsen · Fall 2017 23PDF Image | Healing with light
PDF Search Title:
Healing with lightOriginal File Name Searched:
THESIS_200118_PBL_FINAL.pdfDIY PDF Search: Google It | Yahoo | Bing
Cruise Ship Reviews | Luxury Resort | Jet | Yacht | and Travel Tech More Info
Cruising Review Topics and Articles More Info
Software based on Filemaker for the travel industry More Info
The Burgenstock Resort: Reviews on CruisingReview website... More Info
Resort Reviews: World Class resorts... More Info
The Riffelalp Resort: Reviews on CruisingReview website... More Info
CONTACT TEL: 608-238-6001 Email: greg@cruisingreview.com (Standard Web Page)