Mrs. danvers has multiple sclerosis (ms). she experiences muscle weakness, loss of coordination and speech, and visual disturbances that result from the slowdown or interruption of neural transmission. the cause of these symptoms probably involves the degeneration of her:

Myelin Sheath

Explanation:

Based on the information provided within the question it can be said that the cause of these symptoms probably involves the degeneration of her Myelin Sheath. This is an insulating layer that develops around the nerves and allows electrical impulses to transmit quickly and efficiently throughout the nerve cells, allowing fast coordination, speech, visual accuracy, and muscle movements. Damage to this would cause these impulses to slow down as is the case with Mrs. Danvers.

the use of electrical signals that transit messages is know as