 |  |  | Low serotonin-receptor levels linked to depression
 Researchers say the low number could be the result of damage to the hippocampus that is caused by depressive episodes.
Goate named to Ludwig psychiatry chair
 A key member of the Genetics Research Program, she also is a major contributor to the Alzheimer's Disease Research Center.
 |  |  |  | ![David Gray demonstrates the iBOT Mobility System's impressive abilities at a recent news conference. ibot action [thumb]](http://record.wustl.edu/pub/libs/images/usr/1740_t.jpg) | | David Gray demonstrates the iBOT Mobility System's impressive abilities at a recent news conference. |
Moving upward: Gray helps develop stair-climbing wheelchair
 Through innovative technology, it can power over curbs, climb up and down stairs and even shuttle across sand.
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