Skip to main content
Logo for WebMD
Logo for WebMD
  • Coronavirus Update
  • Check Your Symptoms
  • Find A Doctor
  • Find A Dentist
  • Connect to Care
  • Find Lowest Drug Prices
  • Health
    A-Z     Health A-Z
    Health A-Z
    Common Conditions
    • ADD/ADHD
    • Allergies
    • Arthritis
    • Cancer
    • Coronavirus (COVID-19)
    • Depression
    • Diabetes
    • Eye Health
    • Heart Disease
    • Lung Disease
    • Orthopedics
    • Pain Management
    • Sexual Conditions
    • Skin Problems
    • Sleep Disorders
    • View All
    Resources
    • Symptom Checker
    • WebMD Blogs
    • Podcasts
    • Newsletters
    • Questions & Answers
    • Best Hospitals
    • Find a Doctor
    • Children's Conditions A-Z
    • Surgeries and Procedures A-Z
      • Featured Topics
    • woman experiencing chest discomfort Symptom Checker COVID-19: Check Your Symptoms Now
    • photo of migraine Slideshow Get Help for Migraine Relief
  • Drugs &
    Supplements     Drugs & Supplements
    Drugs & Supplements
    Find & Review
    • Drugs
    • Supplements
    Drug Basics & Safety
    • Commonly Abused Drugs
    • Taking Meds When Pregnant
    Tools
    • Manage Your Medications
    • Pill Identifier
    • Check for Interactions
    • Drug Comparison Tool
      • Featured Topics
    • assorted vitamins Slideshow Vitamins You Need as You Age
    • photo of vaccine Coronavirus COVID-19 Vaccines
  • Living
    Healthy     Living Healthy
    Living Healthy
    Diet, Food & Fitness
    • Diet & Weight Management
    • Weight Loss & Obesity
    • Food & Recipes
    • Fitness & Exercise
    Beauty & Balance
    • Healthy Beauty
    • Health & Balance
    • Sex & Relationships
    • Oral Care
    Living Well
    • Women's Health
    • Men's Health
    • Aging Well
    • Healthy Sleep
    • Healthy Teens
      • Featured Topics
    • grocery cart Article Smart Grocery Shopping When You Have Diabetes
    • walking sneakers Quiz Do You Know the Benefits of Walking?
  • Family &
    Pregnancy     Family & Pregnancy
    Family & Pregnancy
    All About Pregnancy
    • Getting Pregnant
    • First Trimester
    • Second Trimester
    • Third Trimester
    • View All
    Parenting Guide
    • Newborn & Baby
    • Children's Health
    • Children's Vaccines
    • Raising Fit Kids
    • View All
    Pet Care Essentials
    • Healthy Cats
    • Healthy Dogs
    • View All
      • Featured Topics
    • apple slices and peanut butter Slideshow Smart Snacks When You're Pregnant
    • photo of dogs kissing Slideshow Surprising Things You Didn't Know About Dogs and Cats
  • News &
    Experts     News & Experts
    News & Experts
    Health News
    • Why Getting COVID on Purpose Is a Dangerous Idea
    • Why It Takes So Long to Get Your COVID Test Results
    • 7 COVID Antigen Tests Ranked by Ease of Use
    • Red Cross Declares National Blood Crisis
    • Will Smith’s Personal Trainer Talks With WebMD
    Experts & Community
    • Support Groups
    • WebMD Blogs
    • News Center
    • Dr. Whyte's Book: Take Control of Your Cancer Risk
      • Featured Topics
    • photo of Kristy Hammam and Kathy Bates In Memoriam WebMD Loses Cherished Leader Kristy Hammam
    • photo of person typing Get Our Newsletters Health News and Information, Delivered to Your Inbox
  • Mobile Apps
  • Subscriptions
  • Sign In
  • Subscribe
  • My Profile
    • My Tools
    • My WebMD Pages
    • My Account
    • Sign Out

    Brain and Nervous System Research and Studies Home

    • Medical Reference
    • Features
    • Video
    • Slideshows & Images
    • Quizzes
    • News Archive

    Brain & Nervous System Home

    • News & Features
    • Reference
    • Slideshows
    • Quizzes
    • Videos
    • Questions & Answers
    • Find a Neurologist

    Related to Brain & Nervous

    • Living Better With MS
    • ADHD
    • Alzheimer's Disease
    • Autism
    • Bell’s Palsy
    • Concussion
    • Creutzfeldt-Jakob Disease
    • Epilepsy
    • Guillain-Barré Syndrome
    • Lou Gehrig’s Disease (ALS)
    • Multiple Sclerosis
    • Parkinson's Disease
    • Restless Legs Syndrome
    • Spinal Muscular Atrophy
    • Stroke
    • More Related Topics
    • Brain & Nervous System

    5 Types of Spinal Muscular Atrophy

    Back to Brain and Nervous System Research and Studies Home

    Brain and Nervous System Research and Studies Directory

    Medical Reference

    Sort by: Date A-Z
    • Brain Diseases
    • Post-Concussion Syndrome: Symptoms, Treatments, Tests, Recovery, and More
    • Sensory Processing Disorder: Causes, Symptoms, and Treatment
    • Clinical Trials for ADHD

    Today on WebMD

    nerve damage

    What Is Multiple Sclerosis?

    Learn how this disease affects the nervous system.
    tired man

    Why Is My Muscle Twitching?

    Causes of spasms and cramps.
    woman in art gallery

    Keep Your Brain In Good Shape

    Tips to stay smart, sharp, and focused.
    medical marijuana plant

    Medical Marijuana

    What is it used for?

    Recommended for You

    human brain Article

    Is It MS or Am I Having a Stroke?
    boy hits soccer ball with head Slideshow

    How Head Injuries Hurt Your Brain
    red and white swirl Article

    Vertigo: Types, Causes
    marijuana plant ARTICLE

    Medical Marijuana: Can It Treat MS?
    brain illustration stroke Slideshow

    What Is a Stroke?
    nerve damage Slideshow

    MS Symptoms & Causes
    Alzheimers Overview Slideshow

    Signs of Alzheimer's Disease
    Graphic of number filled head and dna double helix Quiz

    How Well Do You Know Your Brain?

    Tools & Resources

    • What Is Sluggish Cognitive Tempo?
    • Stroke Explained in Photos
    • Parkinson's Disease Overview
    • Types of Psychotic Disorders
    • Treating and Preventing Migraines
    • MS & Your Brain: 10 Ways to Stay Sharp

    Health Solutions

    • Penis Curved When Erect?
    • Could I have CAD?
    • Treat Bent Fingers
    • Treat HR+, HER2- MBC
    • Tired of Dandruff?
    • Benefits of CBD
    • Rethink MS Treatment
    • AFib-Related Strokes
    • Risk of a Future DVT/PE
    • Is My Penis Normal?
    • Relapsing MS Options
    • Liver Transplants Save Lives
    • Finance Plastic Surgery
    • Bent Finger Causes
    • Living With Psoriasis?
    • Missing Teeth?

    More from WebMD

    • 5 Tips to Help With Relapsing MS
    • How to Thrive With Narcolepsy
    • Relief for Blocked Hair Follicles
    • Psoriatic Arthritis and Your Sleep
    • What Psoriasis Feels Like
    • First Psoriatic Arthritis Flare
    • Talking to Your Doctor About RA
    • Crohn's: A 'Full-Body' Disease
    • Avoiding Crohn’s Flares
    • Health Benefits of Hemp Seed Oil
    • Live Better With Psoriatic Disease
    • Types of B-Cell Therapy for MS
    • 5 Health Benefits of Hemp
    • Why Prostate Cancer Spreads
    • Living with Advanced Breast Cancer
    • Where Breast Cancer Spreads
    • Logo for WebMD
      • Visit WebMD on Facebook
      • Visit WebMD on Twitter
      • Visit WebMD on Pinterest

    • Policies

      • Privacy Policy
      • Cookie Policy
      • Editorial Policy
      • Advertising Policy
      • Correction Policy
      • Terms of Use

      About

      • Contact Us
      • About WebMD
      • Careers
      • Newsletter
      • Corporate
      • WebMD Health Services
      • Site Map
      • Accessibility

    • WebMD Network

      • Medscape
      • Medscape Reference
      • MedicineNet
      • eMedicineHealth
      • RxList
      • OnHealth
      • WebMDRx
      • First Aid
      • WebMD Magazine
      • WebMD Health Record
      • Dictionary
      • Physician Directory

    • Our Apps

      • WebMD Mobile
      • WebMD App
      • Pregnancy
      • Baby
      • Allergy
      • Medscape

      For Advertisers

      • Advertise with Us
      • Advertising Policy

    © 2005 - 2019 WebMD LLC. All rights reserved.

    WebMD does not provide medical advice, diagnosis or treatment.

    See additional information.