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Neuroscience

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prosthetic hand

LIFE AND LIMB  Prostheses have come a long way in 50 years. Some new artificial limbs can restore wearers’ sense of touch or be controlled by wearers’ thoughts.

hippocampal nerve cells

NO NEW NERVE CELLS  A preliminary study suggests that new nerve cells are not produced in adult humans’ hippocampi, results that conflict with earlier data. Hippocampal nerve cell axons are shown in blue, and glial cells are green. All cells’ nuclei are stained red.

astrocyte

NEW ROLE  A kind of brain cell called an astrocyte (shown) may help nerve cells in the hippocampus form traumatic memories, a study in rats suggests.

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