Navigation Links
'Psychopaths' have an impaired sense of smell
Date:9/20/2012

People with psychopathic tendencies have an impaired sense of smell, which points to inefficient processing in the front part of the brain. These findings by Mehmet Mahmut and Richard Stevenson, from Macquarie University in Australia, are published online in Springer's journal Chemosensory Perception.

Psychopathy is a broad term that covers a severe personality disorder characterized by callousness, manipulation, sensation-seeking and antisocial behaviors, traits which may also be found in otherwise healthy and functional people. Studies have shown that people with psychopathic traits have impaired functioning in the front part of the brain - the area largely responsible for functions such as planning, impulse control and acting in accordance with social norms. In addition, a dysfunction in these areas in the front part of the brain is linked to an impaired sense of smell.

Mahmut and Stevenson looked at whether a poor sense of smell was linked to higher levels of psychopathic tendencies, among 79 non-criminal adults living in the community. First they assessed the participants' olfactory ability as well as the sensitivity of their olfactory system. They also measured subjects' levels of psychopathy, looking at four measures: manipulation; callousness; erratic lifestyles; and criminal tendencies. They also noted how much or how little they emphasized with other people's feelings.

The researchers found that those individuals who scored highly on psychopathic traits were more likely to struggle to both identify smells and tell the difference between smells, even though they knew they were smelling something. These results show that brain areas controlling olfactory processes are less efficient in individuals with psychopathic tendencies.

The authors conclude: " Our findings provide support for the premise that deficits in the front part of the brain may be a characteristic of non-criminal psychopaths. Olfactory measures represent a potentially interesting marker for psychopathic traits, because performance expectancies are unclear in odor tests and may therefore be less susceptible to attempts to fake good or bad responses."


'/>"/>

Contact: Ann Koebler
ann.koebler@springer.com
49-622-148-78414
Springer
Source:Eurekalert

Related biology news :

1. Impaired recovery of Atlantic cod -- forage fish or other factors?
2. The nose knows: Gene therapy restores sense of smell in mice
3. NIH-funded researchers restore sense of smell in mice using genetic technique
4. Making sense out of the biological matrix of bipolar disorder
5. The magnetic sense
6. NUS-led research team discovers how bacteria sense salt stress
7. Manatee hearing good enough to sense approaching motorboats
8. A test of the senses in the search for a shoal mate
9. The birdy smell of a compatible partner
10. Cant smell anything? This discovery may give you hope
11. Smell the potassium
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/30/2016)... , Nov. 30, 2016 Not many of us realize that we spend ... recovery so we need to do it well. Inadequate sleep levels have been found ... pressure, stroke, diabetes, and even cancer. Maybe now is the best time ... could help them to manage their sleep quality? Continue ... ...
(Date:11/29/2016)... -- BioDirection, a privately held medical device company developing ... of concussion and other traumatic brain injury (TBI), announced ... with the U.S. Food and Drug Administration (FDA) to ... the meeting company representatives reviewed plans for clinical development ... of a planned pilot trial. "We ...
(Date:11/29/2016)... CANNES, France , November 29, 2016 Nearly ... Continue Reading ... ... System is part of an efficient Identity Management. (PRNewsFoto/DERMALOG Identification Systems) ... DERMALOG is Germany's largest Multi-Biometric ...
Breaking Biology News(10 mins):
(Date:12/2/2016)... , Dec. 1, 2016   SurePure, Inc. ... today that the Company has concluded an agreement with ... for a 90-day period to acquire units of the ... approximately USD 3.7 million.  Concurrently with ... Tamarack under which Tamarack will seek regulatory approvals in ...
(Date:11/30/2016)... , November 30, 2016 The global ... few players hold a dominant share in the overall ... Laboratories International, Inc., and Merck KGaA, held a lion,s ... Transparency Market Research observes that these companies are expected ... development products that are do not require rabbit pyrogen ...
(Date:11/30/2016)... CHICAGO , Nov. 30, 2016  Tempus, ... customized cancer care, and Penn,s Abramson Cancer Center ... have a positive response to immunotherapy treatment based ... As part of a research collaboration, ... pancreatic and melanoma cancer patient data to Penn. ...
(Date:11/30/2016)... West Lafayette, IN (PRWEB) , ... November 30, 2016 , ... ... together industry experts to discuss the implications of the latest FDA guidance on ... on December 8, 2016 in Cambridge, MA. , The event follows the ...
Breaking Biology Technology: