These BPD memory losses kind of reminds me of a person with Multiple Personality Disorder.  Which I have no experience with other than college Psych classes, and actors on tv. 

I wonder if partially it's because pwBPD are so focused on their internal monologue that they do not attend to outside events? Like, how could you remember a movie you watched when you had headphones in blasting loud music?

Or maybe a more truer analogy would be there is a movie already playing in our heads - with its own plot, characterization, soundtrack - so that it drowns out the movie playing in the theatre we're sitting in.

I know it's more complex than that, just a thought... .

In my opinion, BPD is a mini form of DID.

I hallucinate, dissociate and hear voices when I'm overloaded or upset. I would have episodes of being abuses, where my boyfriend would say my face and mannerisms changed, like I had been 'replaced'.

People with BPD have no 'self' so make up parts as they go along. I would mimick people I was with, or try to copy people I admired and recreate their characteristics. I was empty and let other people define me.

Psychiatry Research. 2005 Dec 15;137(3):191-202. Epub 2005 Nov 17.

The neuropsychology of borderline personality disorder: a meta-analysis and review.

Ruocco AC.

Source: Department of Psychology, Drexel University, 245 N. 15th Street, Mail Stop 626, Philadelphia, PA 19102-1192, USA. acr32@drexel.edu

Abstract

The neuropsychological profile of borderline personality disorder (BPD) is unclear.  Past investigations have produced seemingly inconsistent results of precisely what neuropsychological deficits characterize the patient with BPD.  A meta-analysis of 10 studies was conducted comparing BPD and healthy comparison groups on select neuropsychological measures comprising six domains of functioning: attention, cognitive flexibility, learning and memory, planning, speeded processing, and visuospatial abilities.  BPD participants performed more poorly than controls across all neuropsychological domains, with mean effect sizes (Cohen’s d) ranging from -.29 for cognitive flexibility to -1.43 for planning.  The results suggest that persons with BPD perform more poorly than healthy comparison groups in multiple neurocognitive domains and that these deficits may be more strongly lateralized to the right hemisphere.  Although neuropsychological testing appears to be sensitive to the neurocognitive deficits of BPD, the clinical utility of these results is limited.  Implications of these findings for future neurocognitive investigations of BPD are discussed.