**5. Portable media device: wireless gyroscope platform for quantifying human movement**

Because of the opportunities facilitated by Internet connectivity though the email address, the experimental site and post-processing resources are trans-continentally situated on either

Upon testing and evaluation notable advantages of the portable media device are evident. The portable media device is lighter than the smartphone. Because it only relies on local wireless Internet connectivity, there is only a fixed cost for the device as opposed to a continuous marginal cost to sustain a telecommunication footprint. The portable media device demonstrated the ability to acquire gait data in an accurate and consistent manner [33]. Further testing and evaluation of the portable media device as wireless accelerometer gait analysis system about

As possession of two portable media devices is relatively more feasible than ownership of two smartphones, the application of tandem mounted portable media devices to quantify the disparity present in hemiplegic gait can be readily accomplished. Both portable media devices functioning as wearable and wireless accelerometers were mounted proximal to the lateral malleolus near the ankle joint for the hemiplegic affected leg and unaffected leg. Again the experimental and post-processing resources were trans-continentally situated with the trial

The post-processing aspect derived the affected leg and unaffected leg temporal disparity of stance to stance, time averaged acceleration of stance to stance, and the affected leg/unaffected leg ratio for stance to stance time averaged acceleration less the offset. These quantified gait parameters demonstrated considerable accuracy, consistency, and reliability. From an inferential statistical perspective the temporal disparity of stance to stance and time averaged acceleration of stance to stance for the affected leg contrasted to the unaffected leg demonstrated statistical significance. Future evolutions to the concept envision automated deriva-

As previously disclosed gait and reflex of the lower limb, such as the patellar tendon reflex, are neurologically associated [19, 36]. Therefore the portable media device provides a useful means of quantifying the patellar tendon reflex response. In particular the localized wireless connectivity to the Internet is interrelated with the generally indoor and localized environment inherent for obtaining a series of patellar tendon reflex response samples. LeMoyne and Mastroianni demonstrated in 2011 the ability to accurately and consistently characterize the reflex response through manual supramaximal stimulation using a portable media device as

Further application of the portable media device as a wireless accelerometer platform amalgamated the utility of the potential energy impact pendulum. The portable media device was mounted proximal to the lateral malleolus of the ankle joint by an elastic sock. Each trial sample was transmitted to the Internet through localized wireless connectivity. Post-processing consolidated the accelerometer signals in three dimensions to a single signal presenting acceleration magnitude. The maximum acceleration of the reflex response was the parameter of interest. The application for quantifying reflexes demonstrated the capacity to characterize

the reflex response in a considerably accurate and consistent manner [38].

the lower aspect of the trunk successfully identified temporal features of gait [34].

data wirelessly conveyed to the Internet as an email attachment [35].

tion of parameters and machine learning classification [35].

a wireless accelerometer platform [37].

side of the United States of America [33].

6 Smartphones from an Applied Research Perspective

Further evaluation of the portable media device and its associated software for the capability as a wireless gyroscope platform developed. In particular since the reflex response of the patellar tendon is jointed about the knee, therefore the gyroscope signal revealing the rate of angular rotation provides a highly clinically relevant signal. The trial data of the portable media device functioning as wireless gyroscope platform is wirelessly conveyed to the Internet as an email attachment [31, 39]. Its implications are that the post-processing location, such as in America, can be totally remote from the experimental site, such as remote Tibet.

While on travel LeMoyne and Mastroianni decided to truly test the robust capability of the portable media device as a wireless gyroscope platform for quantifying the patellar tendon reflex response with the experimental site selected as Lhasa, Tibet and the subsequent postprocessing in Flagstaff, Arizona in the United States of America. An advantage of the portable media device is the sole need to locally connect to a local wireless Internet zone. The data samples were obtained through supramaximal stimulation of the patellar tendon reflex. The portable media device was mounted to the lateral malleolus of the ankle through a sock. The data was stored at an assigned email site for later post-processing, for which the maximum of the gyroscope signal characterizing the reflex response was acquired with considerable accuracy and consistency [39].
