Is there such a thing as a midlife crisis? Discuss the idea of a midlife crisis…

Is there such a thing
as a midlife crisis? Discuss the idea of a midlife crisis in terms
of the physical, cognitive, and psychosocial changes in middle
adulthood. Also:

If you believe there is such a thing as a midlife crisis, what
developmental changes in middle adulthood might be the cause? Why
do some middle-aged people experience it and others do not?
If you do not believe that a midlife crisis exists, explain why
you think this myth perpetuates in our society. What developmental
changes (or perhaps stages, i.e. Erikson or Maslow) might be
mistaken for a midlife crisis?