Featured Research

from universities, journals, and other organizations

Why do babies calm down when they are carried?

Date:
April 19, 2013
Source:
RIKEN
Summary:
Parents know that crying babies usually calm down when they are picked up and carried, but why is that? In a study published today, researchers from the RIKEN Brain Science Institute show that human babies and mouse pups alike automatically and deeply relax when they are carried.

Mouse pups automatically relax deeply when they are carried.
Credit: Image courtesy of RIKEN

Parents know that crying babies usually calm down when they are picked up and carried, but why is that? In a study published today, researchers from the RIKEN Brain Science Institute show that human babies and mouse pups alike automatically relax deeply when they are carried.

Related Articles


Their study, published in the journal Current Biology, is the first one to demonstrate that the infant calming response to maternal carrying is a coordinated set of nervous, motor and cardiac regulations. Kumi Kuroda and colleagues Gianluca Esposito and Sachine Yoshida, who carried out the research, propose that it might be an evolutionarily conserved, and essential, component of mother-infant interaction.

"This infant response reduces maternal burden of carrying and is beneficial for both the mother and the infant, " explains Kuroda.

In a series of experiments involving ECG measurements the team observed that the heart rates of babies greatly slow down immediately after they are picked up and carried. But this is not the case if they are simply held. Using a very small ECG system on non-anesthetized mouse pups they were able to observe the same phenomenon in mice.

Both human and mouse babies calm down and stop moving immediately after they are carried, and mouse pups stop emitting ultrasonic cries. Mouse pups also adopt the characteristic compact posture, with limbs flexed, seen in other mammals such as cats and lions.

The researchers determined that in mice this calming response is dependent on tactile inputs and proprioception, the ability to sense and understand body movement. They also report that it is mediated by the parasympathetic nervous system and a region of the brain called the cerebellum.

These findings have important implication for parenting and could contribute to preventing child abuse.

"Such proper understanding of infants would reduce frustration of parents and be beneficial, because unsoothable crying is major risk factor for child abuse," says Kuroda.

"Although our study was done on mothers, we believe that this is not specific to moms and can be used by any primary caregiver," add the authors.


Story Source:

The above story is based on materials provided by RIKEN. Note: Materials may be edited for content and length.


Journal Reference:

  1. Gianluca Esposito, Sachine Yoshida, Ryuko Ohnishi, Yousuke Tsuneoka, MariadelCarmen Rostagno, Susumu Yokota, Shota Okabe, Kazusaku Kamiya, Mikio Hoshino, Masaki Shimizu, Paola Venuti, Takefumi Kikusui, Tadafumi Kato, KumiO. Kuroda. Infant Calming Responses during Maternal Carrying in Humans and Mice. Current Biology, 2013; DOI: 10.1016/j.cub.2013.03.041

Cite This Page:

RIKEN. "Why do babies calm down when they are carried?." ScienceDaily. ScienceDaily, 19 April 2013. <www.sciencedaily.com/releases/2013/04/130419160717.htm>.
RIKEN. (2013, April 19). Why do babies calm down when they are carried?. ScienceDaily. Retrieved November 21, 2014 from www.sciencedaily.com/releases/2013/04/130419160717.htm
RIKEN. "Why do babies calm down when they are carried?." ScienceDaily. www.sciencedaily.com/releases/2013/04/130419160717.htm (accessed November 21, 2014).

Share This


More From ScienceDaily



More Mind & Brain News

Friday, November 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Could Your Genes Be The Reason You're Single?

Could Your Genes Be The Reason You're Single?

Newsy (Nov. 21, 2014) Researchers in Beijing discovered a gene called 5-HTA1, and carriers are reportedly 20 percent more likely to be single. Video provided by Newsy
Powered by NewsLook.com
Milestone Birthdays Can Bring Existential Crisis, Study Says

Milestone Birthdays Can Bring Existential Crisis, Study Says

Newsy (Nov. 21, 2014) Researchers find that as people approach new decades in their lives they make bigger life decisions. Video provided by Newsy
Powered by NewsLook.com
Your Complicated Job Might Keep Your Brain Young

Your Complicated Job Might Keep Your Brain Young

Newsy (Nov. 20, 2014) Researchers at the University of Edinburgh found the more complex your job is, the sharper your cognitive skills will likely be as you age. Video provided by Newsy
Powered by NewsLook.com
100-Year-Old Woman Sees Ocean for First Time

100-Year-Old Woman Sees Ocean for First Time

AP (Nov. 20, 2014) Ruby Holt spent most of her 100 years on a farm in rural Tennessee, picking cotton and raising four children. She saw the ocean for the first time thanks to her assisted living center and a group that grants wishes to the elderly. (Nov. 20) Video provided by AP
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:

More Coverage


From Mice to Humans, Comfort Is Being Carried by Mom

Apr. 18, 2013 There is a very good reason mothers often carry their crying babies, pacing the floor, to help them calm down. New research shows that infants experience an automatic calming reaction upon being ... read more

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