Cardiology

New device could allow your heartbeat to power pacemaker

An experimental device converted energy from a beating heart to provide enough electricity to power a pacemaker, in a study presented at the American Heart Association's Scientific Sessions 2012.

Medical research

Brain's stem cells 'eavesdrop' to find out when to act

Working with mice, Johns Hopkins researchers say they have figured out how stem cells found in a part of the brain responsible for learning, memory and mood regulation decide to remain dormant or create new brain cells. Apparently, ...

Neuroscience

Oligodendroglia cells protect neurons against neurodegeneration

(Medical Xpress) -- Johns Hopkins researchers say they have discovered that the central nervous system's oligodendroglia cells, long believed to simply insulate nerves as they "fire" signals, are unexpectedly also vital to ...

Health

Use of stun guns increases injuries

The police use of stun guns increases the risk of injuries for those on the receiving end, but tends to increase officer safety, according to the most comprehensive study of such devices to date.

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