Search Results

You are looking at 1 - 10 of 1,886 items for :

  • "complexity" x
  • Refine by Access: All Content x
Clear All
Restricted access

Alterations in Quadriceps Neurologic Complexity After Anterior Cruciate Ligament Reconstruction

Steven M. Davi, Colleen K. Woxholdt, Justin L. Rush, Adam S. Lepley, and Lindsey K. Lepley

quadriceps health as it is unable to provide context regarding the complexity of quadriceps neuromuscular function over the entirety of contraction. Utilizing techniques capable of evaluating the complexity of quadriceps neuromuscular function over the duration of contraction is key to progressing our

Restricted access

Contrasting Age Effects on Complexity of Tracking Force and Force Fluctuations During Monorhythmic Contraction

Yi-Ching Chen, I-Chen Lin, Yen-Ting Lin, Wei-Min Huang, Chien-Chun Huang, and Ing-Shiou Hwang

One of the manifestations of aging is that a given function loses its specialization and becomes simplified, known as age-related loss of complexity ( Baltes & Lindenberger, 1997 ). Numerous studies have demonstrated age-related reduction in complexity in the cardiovascular ( Bartzokis, 2004

Restricted access

The Complexity of Sport: Universal Challenges and Their Impact on Women in Sport

Gwendolyn M. Weatherford, Betty A. Block, and Fredrick L. Wagner

nature of sport is also observed and felt on personal levels for many other reasons not attributed to money. As a result of this multi-billion dollar industry and its commodification, there are ensuing complexities and capitalistic directives that correspond with issues and challenges in sport. Mangan

Restricted access

Anticipatory Planning of Movement Sequences in Hemiparetic Cerebral Palsy

Marcel Mutsaarts, Bert Steenbergen, and Harold Bekkering

Anticipatory planning was examined in detail for a complex object manipulation task by capitalizing on both the complexity and the number of elements in the movement sequences in seven individuals with hemiparetic cerebral palsy (HCP) and seven left-handed control participants. Participants had to grasp a hexagonal knob using one of five possible grasping patterns as quicklly as possible following a starting cue (condition I), and sometimes, they had to rotate it subsequently either 60˚ or 120˚ clockwise or counterclockwise (condition II). In the first condition, the HCP participants appear to anticipate the comfort of the different grasping patterns before movement onset, as controls did. However, when the task consisted of more than one movement part, HCP participants did not complete their planning processes before movement onset, which was contrary to controls. Instead, the results suggest that they use a step-by-step planning strategy, that is, they planned the latter parts of a movement sequence as the movement unfolds. The results are discussed in the light of possible capacity limitations of an internal model for grip selection, and a recent model on the planning and on-line control of movement performance.

Restricted access

Restoring Walking Complexity in Older Adults Through Arm-in-Arm Walking: Were Almurad et al.’s (2018) Results an Artifact?

Samar Ezzina, Clément Roume, Simon Pla, Hubert Blain, and Didier Delignières

Complexity is considered an essential feature for living systems, providing them with both robustness and adaptability ( Whitacre, 2010 ). As such, complexity represents an important scope for research focusing on evolution ( Whitacre & Bender, 2010 ) or health ( Lipsitz & Goldberger, 1992

Restricted access

Complexity of Center of Pressure in Postural Control for Children With Autism Spectrum Disorders Was Partially Compromised

Yumeng Li, Melissa A. Mache, and Teri A. Todd

physiological complexity. 18 Multiscale entropy is a nonlinear analysis tool to quantify complexity or irregularity of a time-series signal over multiple time scales. Compared with approximate entropy and sample entropy, multiscale entropy quantifies the overall complexity of a system and allows researchers to

Open access

The Need for Contextual Intelligence in Athletic Training

Matthew R. Kutz

are being asked to navigate is emergent and full of volatility , uncertainty , complexity , and ambiguity (VUCA). This emergence threatens our personal and professional impact. In response, the scholarly literature is full of recommendations on how to navigate VUCA in health care. 1 – 6 In short

Restricted access

Reconceptualizing Teacher Identity: Teachers’ Becoming in the Dynamic Complexity of Teaching Situations

Romana Puchegger and Toni Bruce

, effective, involved, caring, fair, efficient, responsible, reflective, acknowledgeable, collegial, and so on” (p. 163). Instead, weaving together complexity thinking and Deleuze and Guattari’s ( 1987 ) notion of becoming, we argue for a reconceptualization of teaching and teacher–education that moves away

Restricted access

Movement Regularity Differentiates Specialized and Nonspecialized Athletes in a Virtual Reality Soccer Header Task

Christopher D. Riehm, Scott Bonnette, Michael A. Riley, Jed A. Diekfuss, Christopher A. DiCesare, Andrew Schille, Adam W. Kiefer, Neeru A. Jayanthi, Stephanie Kliethermes, Rhodri S. Lloyd, Mathew W. Pombo, and Gregory D. Myer

noticeably less complex than even the low complexity example in Figure  3 . This is also reflected in the lower mean SampEn values from both groups on the DVJ than the same groups on the header task. Figure 4 —Three example COG trajectories from a single participant’s DVJ trials. COG indicates center of

Restricted access

The Amount and Temporal Structure of Center of Pressure Fluctuations During Quiet Standing in Patients With Chronic Low Back Pain

Fatemeh Azadinia, Ismail Ebrahimi-Takamjani, Mojtaba Kamyab, Morteza Asgari, and Mohamad Parnianpour

– 735 . PubMed ID: 25737236 doi:10.1016/j.gaitpost.2015.01.008 10.1016/j.gaitpost.2015.01.008 Rhea , C.K. , Silver , T.A. , Hong , S.L. , Ryu , J.H. , Studenka , B.E. , Hughes , C.M. , & Haddad , J.M. ( 2011 ). Noise and complexity in human postural control: Interpreting the different