Navigation Links
Scientists Use Tarantulas to Explore Human Fear
Date:11/9/2010

By Randy Dotinga
HealthDay Reporter

TUESDAY, Nov. 9 (HealthDay News) -- An experiment using humans, video footage of tarantulas and brain scans sheds new light on the many ways your mind responds to perceived danger.

"When we encounter fear, multiple systems in the brain are acting to help you survive. These systems are monitoring the movements of the threat, detecting surprises and calculating how close the threat is to you. Basically, your brain is multitasking and evaluating the best possible way to escape the danger," explained study author Dean Mobbs, a neuroscience researcher at MRC Cognition and Brain Sciences Unit in Cambridge in the United Kingdom.

Fear, of course, is a deeply primitive human emotion. "We now know that fear is not in one place in the brain, but is represented in many different areas that are highly interconnected," Mobbs said. "Different types of fear can tap into many of the same parts of the brain's fear network, from fear of taking an exam to fear of meeting a bear in the woods."

But there's more to figure out about how the process works. In the new study, Mobbs and colleagues sought to gain more insight into how the brain handles one kind of fear in particular -- the fear of spiders.

"The U.K. has one of the highest amount of spider phobics in the world. This is despite the fact that we have no deadly spiders in the U.K.," Mobbs explained. "Presumably, we learn from others or the media that spiders are scary, yet because we don't encounter them, we cannot habituate to them. Thus, our fears persist."

Mobbs has a personal motivation, too: "I mainly used spiders because I have a slight fear of them."

In the study, which appears in this week's online edition of the Proceedings of the National Academy of Sciences, researchers placed 20 participants in functional-MRI machines. The subjects watched videos that appeared to show tarantulas being placed near their feet at that exact moment.

In reality, the tarantula videos had been recorded earlier. But the subjects didn't know that, allowing their brain scans to reveal the way they processed the threats from the tarantulas as the spiders moved closer to, or further away from, their feet.

"When a spider is placed closer, activity increases in the brain's fear areas. These areas are strongly implicated in defensive response as well as panic," Mobbs said. When the tarantulas moved, activity spiked in the parts of the brain involved in "vigilance or tracking threat," he added.

In conjunction with other findings, "this suggests that many parts of the fear system are working in tandem, each evaluating the external threat in different ways," Mobbs said.

What's next? "A goal of future research should be to try and understand which part of the system breaks down [with phobias]," Mobbs said. "If we can understand this, then we can better engage people with phobias and other types of fear."

The subjects in this study didn't have phobias. But in the future, research could enlist phobic people to see if their brains respond differently to the threat, said Joseph LeDoux, a professor of neuroscience at New York University.

More information

To learn more about phobias, try the U.S. National Library of Medicine.

SOURCES: Dean Mobbs, Ph.D., neuroscience researcher, MRC Cognition and Brain Sciences Unit, Cambridge, U.K.; Joseph LeDoux, Ph.D., professor, neuroscience, New York University; Nov. 8-12, 2010, Proceedings of the National Academy of Sciences, online


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Scientists Say Theyve Made Blood From Skin
2. Hospital for Special Surgery scientists share advances in lupus and related conditions
3. Scientists develop method to keep surgically-removed prostate tissue alive and working for week
4. Scientists turn a new leaf to discover a compound in daffodils that targets brain cancer
5. Scientists Report Early Success in Growing Mini Liver in Lab
6. Scientists seek urgent treatment for fatal sleeping sickness
7. Scientists investigate evolution of new polio virus
8. Scientists Raise Concerns About Flame Retardants
9. Scientists pinpoint gene linked to drug resistance in malaria
10. NIH scientists describe how salmonella bacteria spread in humans
11. UNC scientists receive grant to develop nanotechnology for pancreatic cancer diagnosis and treatment
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists Use Tarantulas to Explore Human Fear
(Date:2/6/2016)... ... February 06, 2016 , ... With the FCPX LUT: Summer pack ... their footage. A LUT is a Lookup Table that contains a mathematical formula for ... by the table. By manipulating each pixel, LUT's can change each color range differently, ...
(Date:2/5/2016)... ... 2016 , ... Steven Tonkinson, 36, of Coconut Grove, Florida, ran the Miami ... in 2003. This year, he ran all 26.2 miles with a green 25-pound ShelterBox ... Miami Heat. , This Sunday, while many are watching the Superbowl, Steven Tonkinson will ...
(Date:2/5/2016)... City, UT (PRWEB) , ... February 05, 2016 , ... ... Whole-Food Nutrition , announced that the much-anticipated feature with author Jahnavi Foster, specialist in ... Humans Amateur TV Network. , Each week, on his weekly Whole-Food Warrior TV show, ...
(Date:2/5/2016)... ... 05, 2016 , ... The Muscular Dystrophy Association and Sailormen ... the 14th annual “Appetite for a Cure” campaign on Feb. 1 to raise ... related diseases that severely limit strength and mobility. , Now through March ...
(Date:2/5/2016)... Dickson, Tennessee (PRWEB) , ... February 05, 2016 ... ... State Community College President George H. Van Allen have signed a joint enrollment ... semester, provides a seamless pathway toward associate and baccalaureate degrees at FHU|Dickson. ...
Breaking Medicine News(10 mins):
(Date:2/5/2016)... SAN DIEGO , Feb. 5, 2016 Aethlon ... Jim Joyce , Chairman and CEO, will be presenting at ... New York, NY at 2:15 p.m. ... participate in an Immunotherapy Panel discussion taking place at 3:15 ... available for replay approximately one hour after the conclusion of ...
(Date:2/5/2016)... India , February 5, 2016 ... a new market research report "Fetal (Labor & Delivery) ... & Antepartum), Warmer, Incubator, Pulse Oximeter, Phototherapy/Jaundice Management Devices, ... published by MarketsandMarkets, This report studies the global market ... market is estimated at USD 6.28 Billion in 2015 ...
(Date:2/4/2016)... Ohio , Feb. 4, 2016 For ... Program, or those already participating in the program, the ... often referred to as the , Mega-Guidance , could ... final guidance is published in September 2016. ... Product and Service Marketing , summarizes the Mega-Guidance,s key ...
Breaking Medicine Technology: