This image shows how the pulley mechanism works.

Mechanized Human Hands

Researchers develop a new device which improves hand function after surgery due to nerve damage.
new bone growth trepanned skull

Ancient Cranial Surgery

Ancient Peruvian healers practiced trepanation, a surgical procedure which involved removing a section of the cranial vault with a hand drill, over 1000 years ago in order to treat a variety of ailments, a new study reports.