Of the choices listed below, the most common cause of traumatic brain injury is
a. stroke.
b. motor vehicle accidents.
c. drug abuse.
d. Alzheimer's disease.
Question 2
Cross-cultural studies of tics find that
a. the types of tics seen most commonly vary with culture.
b. the average age of tic onset appears to be universal.
c. tics occur less frequently in cultures that are less expressive.
d. tics are always seen more frequently in females.
