Manzotti has also been a topic in here before:
Consciousness: Where Are Words? (interview with Riccardo Manzotti)
It's one of those hypotheses that's interesting even if it's wrong, because he's essentially making a herculean effort to explain and map how commonsense realism could even be possible.
The Spread Mind (slide-show)
http://www.thespreadmind.com/The_Spread_Mind_C0.php
Memories seem to be treated as
delayed perceptions; or relationships to the original objects in the past that are still circulating "live" in the brain to be contingently presented again. Thoughts are apparently creative combinations of those. If "appearance is reality", then the original objects themselves should as much be manifestations as the technically described abstractions of the physicist (rational objects). But they conform to coordinates in space and time (physical framework; physical). Arguably residents of an "objective experience" rather than subjective experience. -->
http://www.thespreadmind.com/The_Spread_Mind_C1.php
It's not the first time that phenomena were externalized with respect to the brain and (deceptively or erroneously?) associated with materialism or physicalism rather than traditional mental category or products of neural activity. In panphenomenalism, mind itself was a bundle of impressions rather than being fundamental (as in Berkeley's immaterialism or even one-half of Descartes' dualism).
Edward S. Reed: "
Matter for Huxley was just what it was for Mach or Hertz: a set of phenomenal observations made by scientists. It is thus remarkable but true that the most reviled "materialists" of the 1880s--Huxley, Tyndall, and Clifford--were all phenomenalists of sort or another and not materialists at all. The positivist impulse gave new life to a variety of panphenomenalism..."
Panphenomenalism:
David Hume (1711-1776) formulated the theory of Panphenomenalism [retrospectively labeled as such].
He denied the existence of all ultimate reality (metaphysical reality), accepting as valid data only those things experienced as sense impressions; in other words, he asserted that existence is limited to phenomena, which are objects, not of reason, but of experience. By rejecting the idea of cause and soul as substances, he eliminated the entire problem of interaction. Hume concluded that events depend upon merely repetitious or sequential activities; that nothing in the universe is ever created, or caused to act, by anything else; and that reality consists only of a series of phenomena appearing in a temporal order. Ideas of the Great Philosophers; p. 107 - 108; by William S. Sahakian, Mabel Lewis Sahakian (1966)
Manzotti brings back causal relationships, however. "
All our experience is made of physical things that have had some causal relationship with our bodies."
Tim Parks: "
I can see we’re not going to get very far with this. Your general prediction is that every experience will be traceable back to an actual physical property in the world. But when it comes to fleeting feelings and intuitions, any such tracing back becomes extremely complicated."