Complex sentence: Lashley was originally in search of a single biological locus of memory or "engram" however he ended up disproving his own theory suggesting that memories were not localized in one part of the brain rather they were spread out through the cortex.
Split into simpler sentences: Lashley was originally in search of a single biological locus of memory or "engram". However, he ended up disproving his own theory, suggesting that memories were not localized in one part of the brain; rather, they were spread out through the cortex.