NOVA | scienceNOW | Brain Trauma

Even so-called "mild" head injuries turn out to be anything but.

A helmet that gauges the trauma caused by a blow to the head is just one of many possible ways to assess injury.

Neurosurgeon Jam Ghajar answers viewer questions about preventing and treating concussions and more severe brain injuries.

Read the personal stories of viewers who wrote into NOVA about their traumatic brain injury or that of someone they know.

Examine the skull of a person from 5100 B.C. who underwent brain surgery ... twice.

Brain Trauma