Neuroscience

noun a chronic, typically progressive disease involving damage to the sheaths of nerve cells in the brain and spinal cord, whose symptoms may include numbness, impairment of speech and muscular coordination, blurred vision, and severe fatigue

• Multiple sclerosis is a chronic disease affecting the central nervous system.
• My aunt was recently diagnosed with multiple sclerosis.
• Dealing with MS can be really tough.
• Living with multiple sclerosis feels like constantly walking on a tightrope.

noun a sleep disorder characterized by sudden and uncontrollable episodes of deep sleep

• Narcolepsy is a chronic sleep disorder characterized by overwhelming daytime drowsiness and sudden attacks of sleep.
• My friend has narcolepsy, so he often falls asleep unexpectedly during the day.
• I heard that narcolepsy is like having a superpower that makes you fall asleep at any moment.
• His narcolepsy causes him to drift off into dreamland at the most inconvenient times.

noun Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease that affects nerve cells in the brain and the spinal cord.

• Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease that affects nerve cells in the brain and spinal cord.
• My neighbor was recently diagnosed with ALS.
• ALS is no joke, it's a serious condition.
• The ALS ice bucket challenge raised awareness and funds for research on the disease.