Evaluation of cervical proprioceptive function: optimizing protocols and comparison between tests in normal subjects

STUDY DESIGN: A test-retest design evaluated stability as well as within and between day reliability. \ud \ud OBJECTIVE: The study aimed to define optimum protocols for the cervical joint position error (JPE) and cervicocephalic kinesthesia tests and to investigate association between performances in the tests. \ud \ud SUMMARY OF BACKGROUND DATA: The cervical JPE and cervicocephalic kinesthesia tests are proposed as measures of cervical proprioception. However, there has been little investigation of the number of trials needed to obtain stable and reliable estimates of performance. Both tests have potential limitations in reflecting the underlying construct of cervical proprioception and association between performances in both has not been investigated previously. \ud \ud METHODS: Head repositioning and head-tracking errors were measured using an electromagnetic-tracking system in 16 normal subjects, tested on 3 occasions over 2 days. The effect of different numbers of trial repeats was analyzed descriptively in terms of stability of measures obtained and by using intraclass correlation coefficients to assess reliability. Association between the tests was analyzed with the Pearson correlation coefficient. \ud \ud RESULTS: Stable estimates of performance were obtained when data from 6 or more trials was included. The greatest test-retest reliability was obtained with 5 or more trials in both the cervical JPE (intraclass correlation coefficients = 0.73-0.84) and cervicocephalic kinesthesia (intraclass correlation coefficients = 0.90-0.97) tests. Correlation analyses indicated no significant association between performances in the 2 tests (r = -0.476-0.228, P > 0.05). \ud \ud CONCLUSION: Our finding that at least 6 trials were needed to optimize stability, and reliability of outcome measures has important implications for application of these tests. The lack of correlation between performances in the tests supports the suggestion that they are not comparable measures of cervical proprioception. Further planned studies will include a range of tests challenging different aspects of cervical proprioceptive contribution to sensorimotor control in different subcategories of neck pain patients

THE RELATIONSHIP BETWEEN MUSCULOSKELETAL STRENGTH, PHYSIOLOGICAL CHARACTERISTICS, AND KNEE KINESTHESIA FOLLOWING FATIGUING EXERCISE

Fatiguing exercise may result in impaired functional joint stability and increased risk of unintentional injury. While there are several musculoskeletal and physiological characteristics related to fatigue onset, their relationship with proprioceptive changes following fatigue has not been examined. The purpose of this study was to establish the relationship between musculoskeletal and physiological characteristics and changes in proprioception, measured by threshold to detect passive motion (TTDPM), following fatiguing exercise. Twenty, physically active females participated (age: 28.65 ± 5.6 years, height: 165.6 ± 4.3 cm, weight: 61.8 ± 8.0 kg, BMI: 22.5± 2.3 kg/m2, BF: 23.3 ± 5.4%). During Visit 1, subjects completed an exercise history and 24-hour dietary questionnaire, and body composition, TTDPM familiarization, isokinetic knee strength, and maximal oxygen uptake/lactate threshold assessments. During Visit 2, subjects completed TTDPM and isometric knee strength testing prior to and following a fatiguing exercise protocol. Wilcoxon signed rank tests determined TTDPM and isometric knee strength changes from pre- to post- fatigue. Spearman’s rho correlation coefficients determined the relationship between strength and physiological variables with pre- to post-fatigue changes in TTDPM and with pre-fatigue and post-fatigue TTDPM in extension and flexion (α=0.05). No significant differences were demonstrated from pre-fatigue to post-fatigue TTDPM despite a significant decrease in isometric knee flexion strength (P<0.01) and flexion/extension ratio (P<0.05) following fatigue. No significant correlations were observed between strength or physiological variables and changes in TTDPM from pre- to post-fatigue in extension or flexion. Flexion/extension ratio was significantly correlated with pre-fatigue TTDPM in extension (r=-0.231, P<0.05). Peak oxygen uptake was significantly correlated with pre-fatigue (r=-0.500, P<0.01) and post-fatigue (r=-0.520, P<0.05) TTDPM in extension. No significant relationships were demonstrated between musculoskeletal and physiological characteristics and changes in TTDPM following fatigue. The results suggest that highly trained individuals may have better proprioception, and that the high fitness level of subjects in this investigation may have contributed to absence of TTDPM deficits following fatigue despite reaching a high level of perceptual and physiological fatigue. Future studies should consider various subject populations, other musculoskeletal strength characteristics, and different modalities of proprioception to determine the most important contributions to proprioceptive changes following fatigue

Kinesthesia

Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Αρχιτεκτόνων Μηχανικών. Διπλωματική Εργασί

Aesthetic Dissonance. On Behavior, Values, and Experience through New Media.

Aesthetics is thought of as not only a theory of art or beauty, but also includes sensibility, experience, judgment, and relationships. This paper is a study of Bernard Stiegler’s notion of Aesthetic War (stasis) and symbolic misery. Symbolic violence is ensued through a loss of individuation and participation in the creation of symbols. As a struggle between market values against spirit values human life and consciousness within neoliberal hyperindustrial society has become calculable, which prevents people from creating affective and meaningful attachments to symbols in relation to our retentional apparatuses, technology and memory. Such tension can be thought of as a dissonance between overlapping domains of social life, private and public. New Media is a reflection of aesthetic dissonance, an experience such as being bored and entertained at the same time, between antagonistic experiences, values, and behavior. Moreover, new media is at once a medium of customizing aesthetic experience individually as well as the threat and practice of prioritizing calculability and modeling of consumer behavior in favor of capitalistic effectiveness, which results in the simultaneous categorization of an individual as a data point, putting those who do not fit an algorithm’s premises at a disadvantage

Philosophy of Music Education

A philosophy of music education refers to the value of music, the value of teaching music, and how to practically utilize those values in the music classroom. This thesis explores the philosophies of Emile Jacques-Dalcroze, Carl Orff, Zoltan Kodaly, Bennett Reimer, and David Elliott, and suggests practical applications or their philosophies in the orchestral classroom, especially in the context of ear training and improvisation. From these philosophies, the author develops their own personal philosophy of music education, most broadly defined by the claim that music is key to experiencing and understanding feelingful experiences

Sensing the Urban Interior

Following the principle of “spatial inversion” (Attiwill, 2011), whereby spaces between buildings habitually referred to as exteriors become interiors, this paper presents the background research, methodology and key findings from a case study framed as a perceptual documentation of an urban interior, the More London Estate, a riverside business development in London, England. The location sits at the boundaries between inside and outside, private and public, enclosed and open space. This distinctive position and promise of interiority makes it an ideal site of enquiry. The objective of the research is to uncover connections between the way we feel and our sense of belonging by investigating the correlation between the site’s embodied atmosphere and its perceptual affect on the body. The methodology is inspired by Peter Zumthor’s (2006) writings on atmospheres, James J. Gibson’s (1966, 1986) studies of ecology and perceptual systems, and Joy Monice Malnar and Frank Vodvarka’s (2004) work on sensory design. Key findings reveal a duality in existing perceptual narratives, and the recognition of the way the urban interior resonates with our senses provides a framework for reflection and an incentive towards sensory transformations

Telepresence and telerobotics

The capability for a single operator to simultaneously control complex remote multi degree of freedom robotic arms and associated dextrous end effectors is being developed. An optimal solution within the realm of current technology, can be achieved by recognizing that: (1) machines/computer systems are more effective than humans when the task is routine and specified, and (2) humans process complex data sets and deal with the unpredictable better than machines. These observations lead naturally to a philosophy in which the human's role becomes a higher level function associated with planning, teaching, initiating, monitoring, and intervening when the machine gets into trouble, while the machine performs the codifiable tasks with deliberate efficiency. This concept forms the basis for the integration of man and telerobotics, i.e., robotics with the operator in the control loop. The concept of integration of the human in the loop and maximizing the feed-forward and feed-back data flow is referred to as telepresence

The Philosopher and The Dancer

The Philosopher and The Dancer is an act of spontaneous, solo, movement improvisation; offered here as one particularized instantiation and re-enactment of the corporeal situatedness and interrelatedness of self and world that characterizes Merleau-Ponty’s philosophy. The improvisation can take place in any indoor studio/space, ideally with a suitable floor - the ostensibly static nature of an indoor space/place serving as a clear context for the embodiment and modeling of some of Merleau-Ponty’s core philosophical constructs. As an improvised event, The Philosopher and The Dancer can last for a few minutes (6 or 10) or for longer (15 or 20) and is unaccompanied by music; it is the embodied weave of dancer and immediate environment - a cultivated sensitivity and practised responsiveness to one’s spatial and temporal inherence in a particular world - that is foregrounded. This demonstration/performance is offered as a place in which an alternative articulation of Merleau-Ponty’s thought will be evident

Creative dance can enhance proprioception in older adults

Aim. It has been shown by many authors that proprioception declines with age. However, few studies have examined the effects of exercise interventions on proprioception. The purpose of this study was to investigate the effects of a creative dance program on proprioception of older adults. Methods. Thirty-seven men and women between 55 and 80 years of age, who were not engaged in any exercise program for at least one year, were randomly assigned to an experimental (63.6±5.7 years) or a control group (65.3±7.6 years). The experimental group participated in a creative dance program for 12 weeks with a periodicity of 3 sessions of 90 minutes per week. Measures of knee kinesthesia, knee joint position sense and arm positioning were taken before and after the program. Results. After 12 weeks, knee joint position sense (P=0.005) knee kinesthesia (in flexion) (P=0.04), and arm positioning (P=0.008) significantly improved within the creative dance training group. At 12 weeks follow-up, arm positioning performance was significantly better for the creative dance group when compared with the control group (P=0.043). The control group did not show any significant improvement in proprioception. Conclusion. This study showed that a creative dance program emphasising body awareness can improve proprioception in older adults