Visuomotor expertise and dimensional complexity of cerebral cortical activity

Tsung Min Hung, Amy J. Haufler, Li Chuan Lo, Gottfried Mayer-Kress, Bradley D. Hatfield

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


PURPOSE: This study employed the correlation dimension (D2) to examine whether visuomotor expertise was inversely related to the complexity of cerebral cortical activity. METHOD: Expert rifle shooters (N = 15) and novices (N = 21) completed 40 shots in the standing position during which the electroencephalogram (EEG) was recorded at 10 sites (F3, F4, C3, C4, T3, T4, P3, P4, O1, and O2) during a 5-s aiming period prior to trigger pull. D2 was derived for each trial and averaged across shots. A 2 x 2 x 5 (group x cerebral hemisphere x region) ANOVA was employed to contrast D2, while correlation analyses were used to determine the relationship between D2 and target shooting accuracy as well as variability of shot placement. RESULTS: As predicted, experts exhibited lower D2 (5.02 ± 0.16 vs 5.49 ± 0.13, respectively) and greater accuracy of shot placement ((339.8 ± 44.7 vs 90.7 ± 38.9 points out of 400 possible, respectively). Experts also exhibited an inverse relationship between D2 and shooting accuracy, while, in contrast, novices revealed a positive relationship. DISCUSSION: The results suggest that refinement and efficiency of cerebral cortical activity facilitates visuomotor performance. Lower complexity may be associated with less neuromotor "noise" in the brain, thus reducing interference with intended action.

Original languageEnglish
Pages (from-to)752-759
Number of pages8
JournalMedicine and Science in Sports and Exercise
Issue number4
Publication statusPublished - 2008 Apr
Externally publishedYes


  • Brain
  • Eeg
  • Nonlinear dynamics
  • Psychomotor skill

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation


Dive into the research topics of 'Visuomotor expertise and dimensional complexity of cerebral cortical activity'. Together they form a unique fingerprint.

Cite this