In theory, it is possible to recognize higher level associations above the level of the gene class, because the diversification of homeobox genes will have taken place by a continual series of gene duplication events.
Many of the genetic events are loosely associated with specific tumor subtypes (for example, PIK3CA mutations were not found in basal cancers) such that metabolite correlations with specific genetic features may be confounded by higher level associations.
The study found that clinic scores for GP and patient assessment of waiting time for patients had a positive high-level association.
We use 'ascending' (resp. afferent) and 'descending' (resp. efferent) in reference to the hierarchical direction of corticocortical and corticofugal projections: towards and away from high-level (association) cortex, respectively.
High-level association cortices not only receive feedforward signals from sensory regions but also anticipate and reciprocate these inputs with backward connections conferring context-specificity and higher-level constraints (i.e. predictions) (Rao and Ballard, 1999; Friston, 2003, 2005; Angelucci and Bressloff, 2006).
That is, input from visual cortex influences activity within higher-level association areas (e.g., the frontoparietal network), thus affecting activity within LIM, via connections between frontoparietal network and LIM.
To investigate these phenomena further, neuroimaging measures of functional and effective connectivity could be employed to assess whether e.g. phasic events in REM sleep or the hallucinogenic drug state correlate with an increased limbic input to higher-level association cortices.
No matter what he says, however, Polonsky can't shake speculation of high-level associations and sweetheart deals.
In this study, our goal is to identify high-level associations between gene sets and brain circuits, which typically include multiple genes and multiple QTs.
In this paper, we have proposed a novel enrichment analysis paradigm IGEA to detect high-level associations between gene sets and brain circuits.
