The Theory of Reinvestment argues that conscious processing can impair motor performance. The present study tested the utility of left temporal-frontal cortical connectivity as a neurophysiological marker of movement specific conscious processing. Expert and novice golfers completed putts while temporal-frontal connectivity was computed using high alpha Inter Site Phase Clustering (ISPC) and then analyzed as a function of experience (experts versus novices), performance (holed versus missed putts), and pressure (low versus high). Existing evidence shows that left temporal to frontal connectivity is related to dispositional conscious processing and is sensitive to the amount of declarative knowledge acquired during learning. We found that T7-Fz ISPC, but not T8-Fz ISPC, was lower in experts than novices, and lower when putts were holed than missed. Accordingly, our findings provide additional evidence that communication between verbal/language and motor areas of the brain during preparation for action and its execution is associated with poor motor performance. Our findings validate high-alpha left temporal-frontal connectivity as a neurophysiological correlate of movement specific conscious processing.
Key wordsconscious processing; Inter Site Phase Clustering (ISPC); motor control; Reinvestment Theory; temporal-frontal connectivity 3 Classic theories of motor learning (e.g., Fitts & Posner, 1967) suggest that early in the learning process novices control movements deliberately and consciously, whereas following extensive practice they can learn to control movements automatically with reduced conscious awareness (i.e., they can evolve into experts). Thus, learning represents a transition from deliberate and explicit to automatic and implicit control of movement. This notion has been supported by research using electroencephalography (EEG) to assess cortical activity during movement tasks (for reviews see Cooke, 2013;Hatfield et al., 2004;Requin, Brener, & Ring, 1991). For instance, EEG research has indicated that experts display greater cortical efficiency (e.g., Babiloni et al., 2010), while also being more sensitive to errors (e.g., Cooke et al., 2015) when planning and executing movements.Grounded on classic theories of motor learning and control, the Theory of Reinvestment (Masters, 1992;Masters & Maxwell, 2008) proposes that automated motor processes can be disrupted when task-relevant declarative knowledge is used to consciously control movements. Specifically, reinvestment of declarative knowledge de-chunks automatic motor programs into separate components that require conscious control, causing a regression on the skill acquisition continuum to an earlier, more primitive and less effective stage of movement control (MacMahon & Masters, 1999). Importantly, the theory argues that contingencies such as movement errors, or increases in pressure, can create the conditions for reinvestment to occur (Lam, Masters, & Maxwell, 2010).For instance, pressure -defined as "the presence of situational incentive...