Doctors donât know exactly what causes migraines. It appears that migraine headaches may be caused in part by changes in the level of a body chemical called serotonin. Serotonin plays many roles in the body, and it can have an effect on the blood vessels. When serotonin levels are high, blood vessels constrict (shrink).
Average Salary. The average annual salary for physical therapist in the United States is $86,520, which is 103% higher than the average income of Americans. The median pay for PTs is $7,210 per month, $1,663 per week and $41.59 per hour.
While the fees therapists charge vary according to geographic location and levels of training, one standard session (45-55 minutes) of talk therapy generally runs between $80 and $120. In New York City seeing a psychotherapist runs higher (between $200 and $300), while on the lower end of the scale it is closer to $60.hile the fees therapists charge vary according to geographic location and levels of training, one standard session (45-55 minutes) of talk therapy generally runs between $80 and $120. In New York City seeing a psychotherapist runs higher (between $200 and $300), while on the lower end of the scale it is closer to $60.