Caption: Astrocytes are star-shaped cells that are the most common cell in the human brain and have now been grown from embryonic and induced stem cells in the laboratory of UW-Madison neuroscientist Su-Chun Zhang. Once considered mere putty or glue in the brain, astrocytes are of growing interest to biomedical research as they appear to play key roles in many of the brain's basic functions, as well as neurological disorders ranging from headaches to dementia. In this picture astrocyte progenitors and immature astrocytes cluster to form an "astrosphere." The work was conducted at UW-Madison's Waisman Center.
Photo: provided by Robert Krencik/ UW-Madison