Understanding how your brain and nervous system function can help you recognize the symptoms of conditions that affect them. Learn about diagnostic tests, associated diseases, and treatment options.
Stressed man
Can Stress Cause Seizures?
Subcutaneous injection syringe
Botox (OnabotulinumtoxinA) - Intramuscular, Intradetrusor, or Intradermal
Girl wearing multi-colored sweater looking out the window
What Is the Sympathetic Nervous System?
An image of a male with tree man syndrome
What Is Tree Man Syndrome?
A baby with six toes on each foot
What Is Polydactyly?
Healthcare provider sits across the table from a couple reviewing medical information
What Is XYY Syndrome?
Image of a baby's hand holding an adult's finger
What Is Triple X Syndrome?
Person stretching their fingers while working at desk
What Is Charcot-Marie-Tooth Disease (CMT)?
football players colliding on the field
What Is a Concussion?
Patients holding hands
What is Psychomotor Agitation?
An elderly man looking at black and white photos
Déjà Vu: Definition, Causes, Risk Factors and Treatment
Woman talking to healthcare provider with a clip board
What Is Tethered Cord Syndrome?
images of brain
What Is Amnesia?
Mother checking her son's body temperature using thermometer
What Is Febrile Seizure?
Close up of older person's eye
What Is Locked-In Syndrome?
Healthcare provider looking at brain scans
What Is Hydrocephalus?
Man talking to woman neurologist
What is Progressive Bulbar Palsy?
Doctor talking to older man in examination room
PLS vs ALS: What Are the Differences?
muscle stiffness
What Is Friedreich's Ataxia?
Someone holding a water glass having a motor tic.
Motor Tics
Senior couple holding hands with a cane in one hand.
What Is Superficial Siderosis?
Woman talking to doctor
Brain Tumor Facts and Statistics: What You Need to Know
Person with restless leg syndrome
Using a TENS Unit to Treat Restless Legs Syndrome
Female doctor explains brain injury to mature man after stroke - stock photo
Brain Damage: An Overview
human brain with highlighted corpus callosum
What Is Marchiafava-Bignami Disease?
A disabled man is sitting in a wheelchair.
Paralysis: Everything You Need to Know
woman thinking
What Is a False Memory?
sobriety tracker
How Getting Sober Enabled Me to Confront My Mental Health Issues
impact of alcohol
The Impact of Alcohol on Your Body
Doctor performing brain surgery on patient
What Is Intracranial Hypotension?
Close-up two men clinking glasses of whiskey drink alcohol beverage together at counter in the pub
What Is Alcoholic Neuropathy?
tingling hands
Tingling in the Hands
Couple planning finances and projects is an example of executive function
What Is Executive Function and How Can You Improve It?
Woman with headache talking to doctor about meningitis
Spinal Meningitis: Overview and More
young children in classroom
What Is Cognitive Development & Why Is It Important?
man using scissors
Apraxia: Overview and More
Post Electric Shock Syndrome
What Is Post Electric Shock Syndrome?
Nuerons
What Are Neurons?
Black woman with long braided hair itching her scalp with both hands.
Why Is My Scalp Tingling?
Close up of a doctor having an appointment with a patient with leg pain
Why Is My Leg Shaking?
An illustration of a person sitting up in bed early in the morning
Nocturnal Seizures: Everything You Need to Know
Confused women
What Causes Dissociative Amnesia?
Graphic shows how the stress response system works starting with the hypothalamus and ending with cortisol release.
What Is Cortisol?
Confused women
Retrograde Amnesia: Overview and More
Neurons
Types of Neurons
Early Signs of Tardive Dyskinesia
Child learning on a computer
A Guide to Developmental Dyspraxia
Memory to play game
All About the Different Types of Amnesia
Computer artwork of the brain showing the hypothalamus (red)
What Are Hypothalamus Disorders?
Pharmacist's hands taking medicines from shelf
Tardive Dyskinesia vs. EPS: What Are the Differences?
High Angle View Of Woman Holding Dumbbells
What Is Muscle Weakness?
SPINAL CORD CROSS SECTION, 5X SHOWS: GRAY MATTER (GOLDEN BUTTERFLY), WHITE MATTER, CENTRAL CANAL, DORSAL & VENTRAL ROOT, DORSAL ROOT GANGLION, MENINGES, DORSAL HORN, VENTRAL (ANTERIOR) HORN, & ANTERIOR HORN CELLS (MOTOR NEURON CELL BODIES) - stock photo
How Meninges Support the Brain and Nervous System
Portrait of positive young Asian woman with eye closed, enjoying sunlight under blue sky and clouds
Serotonin vs. Dopamine: What Are the Differences?
young man staring into the sky daydreaming
What Is Maladaptive Daydreaming?
Nerve synapse. Computer artwork of a junction, or synapse, between two nerve cells (neurons, blue). As the electrical signal reaches the presynaptic end of a neuron it triggers the release of neurotransmitters across the gap, or synaptic cleft, between the two cells. The neurotransmitters bind to receptors on the postsynaptic membrane, changing the membrane's excitability and triggering an electrical impulse. A network of neurons is in the background. Each neuron consists of a central cell body with many dendrites branching from it.
What Is Serotonin?
Illustration of synaptic gap between neural cells with neurotransmitters exchanging
What Are Neurotransmitters?
Neuron cell close-up view
Understanding the Structure and Function of an Axon
Portrait of happy woman embracing girls at home
What Are Endorphins?
young woman working on laptop and taking notes
What Is Glutamate?
neurotransmitters in the synaptic gap
What Is Acetylcholine?