FSHD is a rare genetic muscle disease that affects the muscles of your child’s face, shoulders, upper arms, and lower legs.

The fourth cranial nerve controls the actions of one of the external eye muscles. It can be damaged by disease or injury. The condition usually affects only one eye.

Friedreich's ataxia is a rare, inherited, degenerative disease that damages the spinal cord, peripheral nerves and the cerebellum. It causes movement problems and loss of sensation due to nerve injury.

Frontotemporal dementia (FTD), a common cause of dementia, is a group of disorders that occur when nerve cells in the frontal and temporal lobes of the brain are lost. This causes the lobes to shrink. FTD can affect behavior, ...