Persistent sensory experience is good for aging brain

Despite a long-held scientific belief that much of the wiring of the brain is fixed by the time of adolescence, a new study shows that changes in sensory experience can cause massive rewiring of the brain, even as one ages. In addition, the study found that this rewiring involves fibers that supply the primary input to the cerebral cortex, the part of the brain that is responsible for sensory perception, motor control and cognition. These findings promise to open new avenues of research on brain remodeling and aging.

Treating pain with transplants

A new study finds that transplanting embryonic cells into adult mouse spinal cord can alleviate persistent pain. The research, published by Cell Press in the May 24th issue of the journal Neuron, suggests that reduced pain results from successful integration of the embryonic cells into the host spinal cord. The findings open avenues for clinical strategies aimed not just at treating the symptoms of chronic debilitating pain, but correcting the underlying disease pathology.

Study shows how immune cells change wiring of the developing mouse brain

Researchers have shown in mice how immune cells in the brain target and remove unused connections between brain cells during normal development. This research, supported by the National Institutes of Health, sheds light on how brain activity influences brain development, and highlights the newly found importance of the immune system in how the brain is wired, as well as how the brain forms new connections throughout life in response to change.