RT Journal A1 Stephenson J T1 CIty living may shape how the brain processes stress JF JAMA JO JAMA YR 2011 FD July 20 VO 306 IS 3 SP 256 OP 256 DO 10.1001/jama.2011.1000 UL http://dx.doi.org/10.1001/jama.2011.1000 AB The researchers used functional magnetic resonance imaging to scan the brain of 32 healthy student volunteers as they performed arithmetic calculations and heard critical comments about their performance. Measurements of heart rate, blood pressure, and stress hormone levels indicated that the volunteers were indeed experiencing stress during the experiment.