After seeing the neurologist yesterday I've finally determined for certain what's going on. It's an obsession with my own intellect gone into a death spiral. Basically, as soon as I started worrying that I was cognitively declining, the worry fed the stress and distraction and became a self-fulfilling prophecy. Now my entire reality is a reminder of my own self-induced pathology. The solution of course is to do things that take my mind off, well, my MIND, and that's incredibly difficult, but it's the only way. I have a report on Homer to do this weekend, and it's partly done. I need to accomplish something to restore some degree of confidence and fight back to where I used to be.
I have to say, I think Freud would have a field day with this.
The "intellect" isn't really an object, but we traditionally represent it to ourselves as such ("I need to hone/polish my intellect"; "my intellect is cunning"; "he wields such an impressive/massive intellect"). The analogue between the intellect and the phallus is pretty obvious in such cases (or, if you don't buy the psycho-sexual approach, the intellect is often boasted as some object of impress). Regardless, the point is that the abstraction of the intellect is reified in the form of an actual object that you take out of your wallet when you come home in the evening and tuck safely away in your lock-box.
If you do buy the Freudian approach, I'd say that Zeph is suffering from a case of the ol' "fear of castration."
The comment about a "death spiral" is also interesting. In one case, you're obsessed with preserving an anterior state (i.e. the prowess of your intellect); in another case, you're obsessed with progress and development (i.e. of your intellect). In one case, you're dealing with regression: you want to attain the state in which you once were, some previous, apparently "better" state; in another, your intellect is what gives you to posterity. Like germ cells, it's what you have to offer to the next generation.
Time opposes these two obsessions, these two "drives." I'm only just spit-balling by the way, not trying to say anything definitive. However, I do think that while we tend to objectify and cathect onto things like "the intellect", resisting this tendency can have some positive effects. For instance, the intellect not as an object but simply as the energetic receiving of information and apperceptions, and transmitting of new formulations or representations, might reappropriate "the intellect" not as something total and whole, something consistently achieving a new sum of its parts, but as an amorphous and malleable energy. We can't always recall everything we've learned, this is simply one of the flaws of consciousness. My bookshelf is loaded with texts I've read and can barely summarize in a cogent manner; but I can recall which texts deal with what topics, and roughly in what way, and can generally call upon them to cite them if need be, aiding me in the formulation of my own (hopefully unique) argument.
Forgetting is part of what it means to be a human subject. I don't concern myself when I find my "mind" or "intellect" not providing me with the stimulation it typically does, or that I desire. The "I" is not a resevoir that collects and preserves what falls into it, but is more of a filter through which various stimuli and data pass. We can't retain all of this, or even what we choose/wish to. Our positions and perspectives are constantly changing, even if we strive (sometimes irrationally) to preserve them.