Led by a part of the brain called the suprachiasmatic nucleus (scn), a group of cells in the hypothalamus that respond to light and dark signals. From the optic nerve of the eye, light travels to the scn, signaling the internal clock that it is time to be awake. The scn signals to other parts of the brain that control hormones, body temperature and other functions that play a role in making us feel sleepy or awake. In the mornings, with exposure to light, the scn sends signals to raise body temperature and produce hormones like cortisol. The scn also responds to light by delaying the release of other hormones like melatonin, which is associated with sleep onset and is produced when the eyes signal to the scn that it is dark. Melatonin levels rise in the evening and stay elevated throughout the night, promoting sleep. In teenagers, research has shown that melatonin levels in the blood naturally rise later at night than in most children and adults. Since teens may have difficulty going to bed early to get enough sleep, it can help to keep the lights dim at night as bedtime approaches. It can also help to get into bright light as soon as possible in the morning. Circadian disruptions such as jet lag put us in conflict with our natural sleep patterns, since the shift in time and light cues on the brain forces the body to alter its normal pattern to adjust. This is why jet lag can leave travelers feeling poorly and having more difficulty thinking and performing well. But these symptoms can also occur in everyday life, when the circadian rhythm is disrupted by keeping long and irregular hours. viagra cheap pills buy viagra cheap generic viagra buy viagra buy viagra online 100 mg generic viagra generic viagra online cheap viagra real viagra cheap generic viagra online Because of this, it is important to keep a regular sleep schedule and allow plenty of time for quality sleep, allowing these two vital biological components -- the sleep/wake restorative process and the circadian rhythm -- to help us perform at our best. Average: 3. 214952 107 votes your rating: select rating cancel rating poor okay good great your rating: none copyright notice: all materials contained on this site are protected by united states copyright law and may not be reproduced, distributed, transmitted, displayed, published or broadcast without the prior written permission of the national sleep foundation. You may not alter or remove any trademark, copyright or other notice from copies of the content. Links to web sites other than those owned by the national sleep foundation are offered as a service to readers and the foundation is not responsible for their content. Click here to request permission. Advertisement notice: the national sleep foundation neither control nor endorse the advertisements, items or websites featured in the advertisers links on our web pages. National sleep foundation 1010 n. Glebe road, suite 310   |   arlington, va 22201   |   phone (703) 243-1697   e-mail nsf@sleepfoundation. Org â©2011 national sleep foundation. , all rights reserved. Privacy policy | terms & conditions | site map the national sleep foundation.

Welcome to CHIC-CA Fashion Showroom


Dedicated to present and support the development of prestigious fashion labels in the UK. 

A warm welcome from CHIC-ca Fashion Showroom founder and manager,

Cristina Abriani