Neuroscience

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brain neworks

LOCKED IN  Patients in the left two images are outwardly in a vegetative state. But the neural connections, measured by electrical activity, are much more active in the middle patient, whose brain network more closely resembles a healthy volunteer’s (right). All three were asked to imagine themselves playing tennis.

person with breathing mask on

CASE FOR CAUTION  Anesthetics hit young and old brains differently, studies suggest. 

 chemical DHED

TARGETED EFFECT  The chemical DHED produces the hormone estrogen in the brain, but not the body. In mice with tissues genetically modified to light up when exposed to estrogen, pure estrogen produces a bright glowing around the internal organs (center). But mice given DHED (left) do not light up more than untreated mice (right), indicating that DHED does not become estrogen in their bodies. 

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