Of these, she is most likely to have a lower level of the neurotransmitter GABA (gamma-aminobutyric acid).
GABA (gamma-aminobutyric acid) is a vital neurotransmitter produced in the brain, which controls most of the functions of the body and mind. GABA functions by blocking brain signals throughout the nervous system. GABA also takes part in the regulation of muscle tone. GABA is associated with many health problems such as epilepsy, anxiety disorders, depression, movement disorders and insomnia.