Sarcasm is healthy

I'm so sarcastic, so I must be really healthy. Ha ha.
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This title is a bit misleading. Recent research shows that patients who have certain brain disabilities are unable to perceive sarcasm.
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To perceive sarcasm consists of reading the social context. The right parahippocampal gyrus is the part of the brain that detects sarcasm, while the right frontal lobe is where humor is detected on the MRI.
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So when people start being unable to perceive sarcasm it can be a sign of impending dementia.
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Read the interesting article:
http://www.nytimes.com/2008/06/03/health/research/03sarc.html?ex=1228622400&en=03e580d3852b34b7&ei=5087&WT.mc_id=HL-D-I-NYT-MOD-MOD-M047-ROS-0608-HDR&WT.mc_ev=click&mkt=HL-D-I-NYT-MOD-MOD-M047-ROS-0608-HDR