Eigenworm

This extends the applicability of the eigenworm representation and provides a common and compact basis for capturing worm postures.

Source: wiktionary

This suggests that there is some relevant information that is lost in the eigenworm transform.

Source: wiktionary

[…]They illustrated the power of this approach by analyzing the behavior of mutant strains of C. elegans, which did not differ in their classical behaviors as defined via traditional ethograms , but they did differ substan- tially in the detailed statistics of their behavior , as quantified by projecting their behavior onto a 4D eigenworm space.

Source: wiktionary