When is solitary confinement used and what is the impact upon the prisoner from a mental and sociological perspective? Is there a “type” of prisoner that is subjected more to solitary confinement than other “types” of prisoners?

When is solitary confinement used and what is the impact upon the prisoner from a mental and sociological perspective? Is there a “type” of prisoner that is subjected more to solitary confinement than other “types” of prisoners? Address the validity of using solitary confinement as a remedy to reduce prison violence, inmate punishment, and inmate protection.