Psychology news

• Genetic risk factors for Alzheimer's disease may be detectable even in young adults

  06-07-2016 23:55
  A genetic risk score may detect those at higher risk for Alzheimer’s disease long before symptoms appear—even possibly in healthy young adults, according to a new study.
  
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• People with anger disorder have decreased connectivity between regions of the brain

  06-07-2016 23:53
  People with intermittent explosive disorder (IED), or impulsive aggression, have a weakened connection between regions of the brain associated with sensory input, language processing and social interaction.
  
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• Small molecule keeps new adult neurons from straying, may be tied to schizophrenia

  06-07-2016 19:59
  The microRNA miR-19 helps budding adult brain cells stay on track, new research indicates. The findings pave the way toward a better understanding of how the adult brain controls the growth of new neurons and how it can go wrong.
  
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• Poor sleep health could contribute to inflammatory disease

  06-07-2016 18:00
  
  A new meta-analysis in Biological Psychiatry reports that sleep disturbances and long sleep duration are associated with increases in markers of inflammation.
  
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• Marijuana use dampens brain's response to reward over time, study finds

  06-07-2016 17:44
  Most people would get a little 'rush' out of the idea that they're about to win some money. In fact, if you could look into their brain at that very moment, you'd see activity in the part of the brain that responds to rewards. But for marijuana users, that rush just isn't as big -- and gets smaller over time, a new study finds. And that may open them up to more risk of addiction.
  
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• A sense of direction in the brain: Seeing the inner compass

  06-07-2016 15:28
  Head direction cells in rodents are directly connected with other neuronal structures used in navigation, most importantly the ‘grid cell area,’ report investigators.
  
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• Artificial intelligence may aid in Alzheimer's diagnosis

  06-07-2016 15:14
  Machine learning is a type of artificial intelligence that allows computer programs to learn when exposed to new data without being programmed. Now, researchers have coupled machine learning methods with a special MRI technique that measures the perfusion, or tissue absorption rate, of blood throughout the brain to detect early forms of dementia, such as mild cognitive impairment, according to a new study.
  
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• Smoking cannabis with tobacco increases risk of dependence

  06-07-2016 09:00
  
  A recent large-scale survey investigating cannabis use in 18 countries finds that mixing it with tobacco lessens an individuals motivation to quit.
  
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