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:2/2/2016)...   Parabon NanoLabs (Parabon) announced today ... Office and the Defense Forensics and Biometrics Agency ... company,s Snapshot Kinship Inference software for ... defense-related DNA forensics.  Although Snapshot is best known ... ancestry from DNA evidence), it also has the ...
(Date:1/28/2016)... Synaptics (NASDAQ: SYNA ), a leading developer of human interface ... 31, 2015. --> --> ... percent compared to the comparable quarter last year to $470.5 million. ... million, or $0.93 per diluted share. --> ... of fiscal 2016 grew 9 percent over the prior year period ...
(Date:1/22/2016)... 2016 http://www.researchandmarkets.com/research/p74whf/global_biometrics ... "Global Biometrics Market in Retail Sector ... --> http://www.researchandmarkets.com/research/p74whf/global_biometrics ) has announced ... Market in Retail Sector 2016-2020" report ... Research and Markets ( http://www.researchandmarkets.com/research/p74whf/global_biometrics ) has ...
Breaking Biology News(10 mins):
(Date:2/3/2016)... 3, 2016 New Jersey Health Foundation (NJHF) ... million for researchers in New Jersey ... that demonstrates exciting potential.   James ... the New Jersey Health Foundation Research Grant Program ... educational institutions— Princeton University, Rutgers University, Rowan University ...
(Date:2/3/2016)... ... February 03, 2016 , ... ProMIS Neurosciences is currently in ... to misfolded, propagating strains of Amyloid beta involved in Alzheimer’s disease. The Company ... , Following on from the first misfolded Amyloid beta target announced on Nov. ...
(Date:2/3/2016)... ... February 03, 2016 , ... Resilinc released ... and analyzes nearly 750 unique supply chain notifications and alerts generated by its ... Supply chain risk management practitioners subscribe to the EventWatch service to receive early ...
(Date:2/3/2016)...  Today, Symphony Technology Group (STG) announced the closing ... provider of primary research and analytics-based insight for biopharmaceutical ... a global information and technology services company serving the ... be integrated into IMS Health to form a foundation ... ...
Breaking Biology Technology: