Well, I was wondering if my memory was correct about what happens in so-called "Liminal" depression, and how that differs from other [MLC] depression.
I believe this is what you are referring to:
In his book In Midlife A Jungian Perspective, Murray Stein identifies three stages of a Midlife Transition.
1. Separation 2. Liminality 3. Reintegration
Since a Midlife Crisis is a Midlife Transition of catastrophic levels, the transition stages must be a part of the Crisis stages. I will use the stages outlined below. These are not a Map, but rather a loose structure for the process of growth. The phases cycle and recycle throughout the Midlife Journey. For this reason the main phases may be viewed as a loose order, but the subphases are synergistic characteristics rather than ordered steps.