Eva V. Monsma
Sandra E. Short, Eva V. Monsma and Martin W. Short
Brian D. Seiler, Eva V. Monsma and Roger D. Newman-Norlund
This study extended motor imagery theories by establishing specificity and verification of expected brain activation patterns during imagery. Eighteen female participants screened with the Movement Imagery Questionnaire-3 (MIQ-3) as having good imagery abilities were scanned to determine the neural networks active during an arm rotation task. Four experimental conditions (i.e., KINESTHETIC, INTERNAL Perspective, EXTERNAL Perspective, and REST) were randomly presented (counterbalanced for condition) during three brain scans. Behaviorally, moderate interscale correlations were found between the MIQ-3 and Vividness of Movement Imagery Questionnaire-2, indicating relatedness between the questionnaires. Partially confirming our hypotheses, common and distinct brain activity provides initial biological validation for imagery abilities delineated in the MIQ-3: kinesthetic imagery activated motor-related areas, internal visual imagery activated inferior parietal lobule, and external visual imagery activated temporal, but no occipital areas. Lastly, inconsistent neuroanatomical intraindividual differences per condition were found. These findings relative to recent biological evidence of imagery abilities are highlighted.
Jennifer L. Gay, Eva V. Monsma, Alan L. Smith, J.D. DeFreese and Toni Torres-McGehee
Growth and maturation may impact adolescent behavior and development of psychological disorders. Currently age at menarche is used as the primary marker of maturation, even though it occurs later than other indicators of growth such as peak height velocity (PHV). Maturity offset predicting age at PHV has not been validated in diverse samples. Anthropometric measures and self-reported age at menarche were obtained for 212 female athletes ages 11 to 16 years (M = 13.25). Shared variance between menarcheal age and estimated age at PHV (APHV) was small (R 2 = 5.3%). Discriminant validity was established by classifying participants as pre- or post-PHV or menarche (X2 = 32.62, P < .0001). The Pearson’s correlation between chronological age and age at PHV (r = .69) was stronger than with age at menarche (r = .26). Making informed decisions about accounting for growth and maturation using estimated age at PHV are offered.