nerve

In Parkinson's disease, this protein sticks together into toxic clumps that cause nerve cell death and leads to patients suffering from symptoms such as tremors, difficulties moving and muscle stiffness.

Detailed scans by the optician showed damage to her optic nerve because of swelling in her brain.

“I knew it would touch a nerve,” Peck, 72, says over Zoom from New York.

Human hands, however, are equipped with thousands of nerve endings of dizzying variety, giving fingers the feedback needed to grip and manipulate tools.

As the nerve cells stop working, swallowing and breathing become more challenging and many people need feeding tubes or breathing apparatus to help them stay alive.