Featured Research

from universities, journals, and other organizations

Maternal Smoking May Alter Arousal Process Of Infants, Increasing Their Risk For SIDS

Date:
April 7, 2009
Source:
American Academy of Sleep Medicine
Summary:
A new study shows that maternal smoking is associated with an impaired infant arousal process that may increase the risk for sudden infant death syndrome. The authors suggest that maternal smoking has replaced stomach sleeping as the greatest modifiable risk factor for SIDS.

A study in the April 1 issue of the journal SLEEP shows that maternal smoking is associated with an impaired infant arousal process that may increase the risk for sudden infant death syndrome (SIDS). The authors suggest that maternal smoking has replaced stomach sleeping as the greatest modifiable risk factor for SIDS.

Related Articles


Results show that the progression from sub-cortical activation to cortical arousal was depressed in smoke-exposed infants, who had lower proportions of full cortical arousals from sleep and higher proportions of sub-cortical activations than infants born to non-smoking mothers. The study also indicates that there is a dose-dependent relationship between cortical activation proportions and levels of infant urinary cotinine, a nicotine metabolite. Cortical arousals were lowest in babies with higher levels of smoke exposure.

According to senior investigator Rosemary Horne, PhD, scientific director of the Ritchie Centre for Baby Health Research at Monash University in Melbourne, Australia, decreased cortical arousals from sleep have been observed in victims of SIDS prior to death.

"Our study suggests that maternal smoking can impair the arousal pathways of seemingly normal infants, which may explain their increased risk for SIDS," said Horne.

According to the authors, SIDS is the third-leading cause of infant mortality in the U.S. Although the exact cause is unknown, research suggests that an impairment of the arousal process from sleep in response to a life-threatening situation is involved. Autopsies of SIDS victims have revealed brainstem abnormalities in key areas that are required for arousal and cardiorespiratory control.

The study involved 12 healthy, full-term infants born to mothers who smoked an average of 15 cigarettes per day. Their arousal responses during daytime sleep were monitored and compared with that of 13 healthy infants who were born to nonsmoking mothers.

Daytime polysomnography was performed on each child on three occasions: at 2 to 4 weeks, 2 to 3 months and 5 to 6 months of age. Arousals were induced without compromising the infants' natural sleep cycles by delivering a pulsatile air-jet for five seconds through a hand-held cannula at the infants' nostrils.

The air pressure was increased incrementally until arousal criteria were met. Sub-cortical arousals were defined by body movements, heart rate increases and respiratory changes. Full cortical arousals involved a sub-cortical arousal that was accompanied by an abrupt change in electroencephalogram frequency.

According to the authors, 15 percent to 25 percent of pregnant women in Western countries smoke throughout pregnancy.


Story Source:

The above story is based on materials provided by American Academy of Sleep Medicine. Note: Materials may be edited for content and length.


Journal Reference:

  1. Richardson HL; Walker AM; Horne RSC. Maternal Smoking Impairs Arousal Patterns in Sleeping Infants. SLEEP, 2009; 32 (4): 515-521 [link]

Cite This Page:

American Academy of Sleep Medicine. "Maternal Smoking May Alter Arousal Process Of Infants, Increasing Their Risk For SIDS." ScienceDaily. ScienceDaily, 7 April 2009. <www.sciencedaily.com/releases/2009/04/090401101729.htm>.
American Academy of Sleep Medicine. (2009, April 7). Maternal Smoking May Alter Arousal Process Of Infants, Increasing Their Risk For SIDS. ScienceDaily. Retrieved November 25, 2014 from www.sciencedaily.com/releases/2009/04/090401101729.htm
American Academy of Sleep Medicine. "Maternal Smoking May Alter Arousal Process Of Infants, Increasing Their Risk For SIDS." ScienceDaily. www.sciencedaily.com/releases/2009/04/090401101729.htm (accessed November 25, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Tuesday, November 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

Newsy (Nov. 25, 2014) The US FDA is announcing new calorie rules on Tuesday that will require everywhere from theaters to vending machines to include calorie counts. Video provided by Newsy
Powered by NewsLook.com
Daily Serving Of Yogurt Could Reduce Risk Of Type 2 Diabetes

Daily Serving Of Yogurt Could Reduce Risk Of Type 2 Diabetes

Newsy (Nov. 25, 2014) Need another reason to eat yogurt every day? Researchers now say it could reduce a person's risk of developing type 2 diabetes. Video provided by Newsy
Powered by NewsLook.com
Madagascar Working to Contain Plague Outbreak

Madagascar Working to Contain Plague Outbreak

AFP (Nov. 24, 2014) Madagascar said Monday it is trying to contain an outbreak of plague -- similar to the Black Death that swept Medieval Europe -- that has killed 40 people and is spreading to the capital Antananarivo. Duration: 00:42 Video provided by AFP
Powered by NewsLook.com
Are Female Bosses More Likely To Be Depressed?

Are Female Bosses More Likely To Be Depressed?

Newsy (Nov. 24, 2014) A new study links greater authority with increased depressive symptoms among women in the workplace. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins