Neuroscience

Scientists shed light on how brains turn pain up or down

Pain perception is essential for survival, but how much something hurts can sometimes be amplified or suppressed: for example, soldiers who sustain an injury in battle often recall not feeling anything at the time.

Health

Young drinkers more 'selfie-conscious,' research suggests

Young Australians are less likely to over-indulge in booze and illicit drugs because they like to keep up appearances in their social media-sphere, according to a Flinders University expert on substance abuse and addiction.

Health

'This ain't your mother's marijuana,' surgeon general says

Federal health officials issued a national warning Thursday against marijuana use by adolescents and pregnant women, as more states legalize the increasingly potent drug for medicinal and recreational use.

Diseases, Conditions, Syndromes

Florida latest place to declare emergency over hepatitis A

Officials have declared a public health emergency over the rising number of hepatitis A cases in Florida, the latest part of the country dealing with outbreaks of the liver disease.

Neuroscience

Unraveling the brain's reward circuits

To some, a chocolate cake may spark a shot of pleasure typically associated with illicit drugs. A new study by Penn biologists offers some insights into that link, revealing new information about how the brain responds to ...

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