Navigation Links
Babies' biological clocks dramatically affected by birth light cycle
Date:12/5/2010

This eliminated the day/night cues that normally reset biological clocks and allowed the scientists to determine their biological clock's intrinsic cycles.

The scientists found a substantial difference between the summer-born and winter-born groups.

The summer-born mice behaved the same whether they had been kept on the summer cycle or switched to the winter cycle. They started running at the time of dusk (as determined by their former day/night cycle), continued for ten hours and then rested for 14 hours.

The behavior of the winter-born mice was much different. Those who had been kept on the winter light cycle through maturation showed basically the same pattern as their summer cousins: They became active at the time of dusk and continued for 10 hours before resting. However, those who had been switched to a summer cycle remained active for an extra hour and a half.

When they looked at what was happening in the brains of the different groups, they found a strikingly similar pattern.

In the summer-born mice, the activity of the neurons in the SCN peaked at the time of dusk and continued for 10 hours. When the winter-born mice were matured in the winter cycle, their neuronal activity peaked one hour after the time of dusk and continued for 10 hours. But, in the winter-born mice switched to a summer cycle, the master bioclock's activity peaked two hours before the time of dusk and continued for 12 hours.

When they looked at the equinox group, the scientists found variations that fell midway between the summer and winter groups. Those subjected to a summer cycle when they matured had biological clocks that peaked one hour before the time of dusk and the biological clocks of those subjected to a winter cycle peaked a half hour after the time of dusk. In both cases the duration of SCN activity was 11 hours.

Their analysis showed that these variations are caused by alterations in the activity patterns of the individual neurons, rat
'/>"/>

Contact: David F. Salisbury
david.salisbury@vanderbilt.edu
615-343-6803
Vanderbilt University
Source:Eurekalert

Page: 1 2 3 4 5

Related biology news :

1. World breakthrough in treating premature babies
2. Consumers desire more genetic testing, but not designer babies
3. Study finds rescue course of antenatal steroids improves outcome in premature babies
4. Mama whales teach babies where to eat
5. Engineering bouncing babies, 1 at a time
6. Tufted bacteria cause infection in premature babies
7. Babies born to native high-altitude mothers have decreased risk of low birth weight
8. ICSI or IVF: Babies born from frozen embryos do just as well
9. Supplementing babies formula with DHA boosts cognitive development
10. Will giving coffee to babies keep them awake as adults?
11. Healthy babies by the numbers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/22/2014)... (AM), or 3D printing, has rapidly advanced to ... strong enough for structural applications. However, developing complex ... as quality standards to test the manufactured items, ... at the University of Pittsburgh,s Swanson School of ... simulation (M&S) technology and new qualification standards that ...
(Date:9/22/2014)... be much more useful in homes, if they could ... the world with cameras and lasers, which have difficulty ... hidden in clutter. A complementary way robots can "sense" ... small ultra-high frequency radio-frequency identification (UHF RFID) tags. Inexpensive ... RFID-equipped robot to search a room for the correct ...
(Date:9/22/2014)... 2,819 people have occurred in the wake of the ... Eldorado National Forest. The King Fire is burning ... American River Canyon, Silver Creek Canyon, and the Rubicon ... fire has crossed into Placer County and burned onto ... Forest. The anticipated spread is expected to be minimal ...
Breaking Biology News(10 mins):Pitt engineers receive grants to enhance additive manufacturing 2Pitt engineers receive grants to enhance additive manufacturing 3New RFID technology helps robots find household objects 2New RFID technology helps robots find household objects 3
... -- Jade Holding Group, LLC dba Strax Rejuvenation, one ... wellness centers, has just announced that it is now ... and women who are interested in getting a hair ... to help. (Photo: http://photos.prnewswire.com/prnh/20130830/MN72022 ) ...
... York have discovered that very small chemical changes to dietary ... are tested for their impact on the human immune system., ... small molecules an average leaf for example, produces around ... and some are already known to have medicinal properties with ...
... receive $1.3 million over the next five years from ... Diseases (NIDDK) for research that will help better understand ... of novel treatments to reverse the disease. The ... suffer from type 2 diabetes--a number expected to double ...
Cached Biology News:Hair Transplant Offer and No-Cost Consultation are Now Available at Strax Rejuvenation 2Hair Transplant Offer and No-Cost Consultation are Now Available at Strax Rejuvenation 3Little changes -- large effects 2Type 2 diabetes study to examine role amylin plays in disease 2
(Date:9/22/2014)... NY (PRWEB) September 22, 2014 Topical ... helping those in pain end their suffering, restoring hope ... healthcare model. This is only possible because of the ... and healing cream technology a reality. , The ... Rhinebeck, NY, by Lou Paradise (president, chief of research, ...
(Date:9/22/2014)... 22, 2014 Follow us ... natural biopolymers available in abundance in nature. These ... resources such as shells of crustaceans. The significant ... due to the high percentage of nitrogen present ... in various industries owing to its exclusive properties ...
(Date:9/22/2014)... 22, 2014 Follow us ... stay young has groomed and nurtured anti-aging products ... Growing emphasis on appearance maintenance is benefitting the ... neurotoxic protein obtained from the bacterium, Clostridium Botulinum, ... muscle relaxation. With cosmetic indications for botulinum toxin ...
(Date:9/22/2014)... 22, 2014 Research and Markets ... Chinese Microcrystalline Cellulose Industry Report 2014" report to ... Microcrystalline Cellulose Industry Report 2014 is a professional and ... microcrystalline cellulose industry with a focus on the Chinese ... of the industry including definitions, classifications, applications and industry ...
Breaking Biology Technology:Topical BioMedics (Topricin) Celebrates 20 Years of Providing Hope and Quality of Life...As Topricin Is Declared “The 21st Century Standard of Care for Pain Management” 2Topical BioMedics (Topricin) Celebrates 20 Years of Providing Hope and Quality of Life...As Topricin Is Declared “The 21st Century Standard of Care for Pain Management” 3Topical BioMedics (Topricin) Celebrates 20 Years of Providing Hope and Quality of Life...As Topricin Is Declared “The 21st Century Standard of Care for Pain Management” 4Topical BioMedics (Topricin) Celebrates 20 Years of Providing Hope and Quality of Life...As Topricin Is Declared “The 21st Century Standard of Care for Pain Management” 5Topical BioMedics (Topricin) Celebrates 20 Years of Providing Hope and Quality of Life...As Topricin Is Declared “The 21st Century Standard of Care for Pain Management” 6Emergence of New Application Areas to Drive the Global Chitin and Chitosan Market, According to New Report by Global Industry Analysts, Inc. 2Emergence of New Application Areas to Drive the Global Chitin and Chitosan Market, According to New Report by Global Industry Analysts, Inc. 3Strong Demand for Non-Invasive Cosmetic Procedures Drives the Global Botulinum Toxin Market, According to New Report by Global Industry Analysts, Inc. 2Strong Demand for Non-Invasive Cosmetic Procedures Drives the Global Botulinum Toxin Market, According to New Report by Global Industry Analysts, Inc. 3Global and Chinese Microcrystalline Cellulose Industry Report 2014 2
... The Albert and Mary Lasker Foundation, which for 66 ... the winners of the 2011 Lasker Awards : Franz ... basic medical research, Tu Youyou for clinical research and ... for public service. The Lasker Awards – considered among the most ...
... 2011 Mass High Tech has selected ... recipient of its 2011 All-Stars Award, one that recognizes ... economy.   Camacho will be recognized for ... the life sciences sector.  As a patent attorney, she ...
... low-intensity, pulsed ultrasound can be used to noninvasively ... rapid-response medical devices. The team that made that ... professor with the Virginia Tech Carilion Research Institute, ... approach, which may one day lead to first-line ...
Cached Biology Technology:2011 Lasker Awards Honor Medical Research Pioneers 22011 Lasker Awards Honor Medical Research Pioneers 32011 Lasker Awards Honor Medical Research Pioneers 42011 Lasker Awards Honor Medical Research Pioneers 52011 Lasker Awards Honor Medical Research Pioneers 62011 Lasker Awards Honor Medical Research Pioneers 7Greenberg Traurig Shareholder Jennifer A. Camacho Selected to Receive Mass High Tech's 2011 All-Stars Award 2Neuroscientists produce guide for ultrasound use to treat brain disorders in clinical emergencies 2Neuroscientists produce guide for ultrasound use to treat brain disorders in clinical emergencies 3
...
... The FailSafe™ PCR System is the only ... first time and every time. It provides ... of the source or the property of ... FailSafe™ PCR Enzyme Mix, a unique blend ...
...
... EnVision™ G|2 Doublestain System is a ... visualization kit. The kit is intended ... simultaneous detection of two different antigens ... compatible with suitably diluted rabbit and ...
Biology Products: