Manic depression is the old school term for bipolar. So, it is, indeed the same thing. Borderline Personality disorder is different again; a different set of criteria apply to have that diagnosis, although it appears to share many traits with bipolar disorder.

I have the same as @A MyDepressionTeam Member - bipolar, borderline and PTSD, and general anxiety disorder. I am stable on medication after a long battle without it - and a short battle of trying to find the right combination of meds that would stabilise me.

the manic in depression is the other pole Mania/Depression

The technical term used to be manic depression. Now it's bipolar disorder. That's the current name in the medical world anyway. They are both the same thing though.

@classy Jackie, how do you differentiate between PTSD and depression?

thanks for the reply I can see how the post traumatic stress disorder is different ive seen and witnessed and heard distress enough I hope never experience in life again im permently scared xx