Body & Brain

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effects of radiation on the brain

BRAIN ZAP  After radiation exposure, mouse dendrites (green) in the medial prefrontal cortex were shorter and branched less than those of mice not exposed to radiation, as seen in this digital reconstruction. Exposed dendrites also had fewer docking sites (red) that detect messages from other cells. 

NUCLEAR DISARRAY  Normally tightly packed bundles of DNA (as in the normal stem cells, left) come undone in cells that age prematurely (right), enlarging their nuclei and promoting aging.

baby crying

A baby’s cries can change the behavior of key cells in mom’s brain, a study in mice suggests. 

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