Gamma-aminobutyric acid (GABA) is an inhibitory neurotransmitter in your brain, meaning it slows your brain’s functions. GABA is known for producing a calming effect.

A hematocrit test is part of a complete blood count (CBC). It tells your provider what percentage of your blood is red blood cells. Learn more about this test here.

Glutamate is also needed for making another neurotransmitter in your brain called gamma-aminobutyric acid (GABA). GABA is known as the “calming” neurotransmitter. It’s involved in sleep, relaxation, anxiety regulation and muscle function. Glutamate is also an amino acid. Amino acids are the building blocks of protein.

Sciatica is nerve pain that starts in your lower back and may shoot down your leg. It’s common and often improves with self-care or treatment.

Many people with stiff person syndrome make antibodies against glutamic acid decarboxylase (GAD). GAD makes a neurotransmitter called gamma-aminobutyric acid (GABA), which helps control muscle movement. Researchers don’t yet understand the exact role that GAD plays in the development and worsening of stiff person syndrome.

Postpartum psychosis is a condition that disrupts a person’s sense of reality after they give birth. This is a mental health emergency that needs immediate care.

Epstein-Barr Virus is a very common and highly contagious infection. The virus spreads through saliva and body fluids and can lead to mononucleosis.

Perimenopause is the transition to menopause when hormone levels decline and symptoms like hot flashes and irregular periods start. It can last years.

Iliotibial band syndrome is where a tendon called the iliotibial band gets irritated or swollen from rubbing against your hip or knee bones. It causes sharp pain.

Foraminal stenosis is a narrowing that affects spinal nerves in your back. Most people with it don’t have symptoms, but some may have pain or nerve-related issues.