Joint kinematics estimate using wearable inertial and magnetic sensing modules

Picerno, Pietro; Cereatti, Andrea; Cappozzo, Aurelio

doi:10.1016/j.gaitpost.2008.04.003

Cited by 225 publications

(204 citation statements)

References 23 publications

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“…(1) its anatomical CSs are consistent with ISB recommendations; (2) its performances are widely tested and documented [1,2,8]; (3) it was the reference protocol used in [17]; (4) it requires the use of clusters of markers, which can be thought as SU, and the definition of technical frames, which are analog to the local CS of a SU. These features ease the simultaneous application of CAST and Outwalk.…”

Section: Discussionmentioning

confidence: 78%

First in vivo assessment of “Outwalk”: a novel protocol for clinical gait analysis based on inertial and magnetic sensors

Ferrari

Cutti

Garofalo

et al. 2009

Med Biol Eng Comput

158

127

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A protocol named "Outwalk" was recently proposed to measure the thorax-pelvis and lower-limb kinematics during gait in free-living conditions, by means of an inertial and magnetic measurement system (IMMS). The aim of this study was to validate Outwalk on four healthy subjects when it is used in combination with a specific IMMS (Xsens Technologies, NL), against a reference protocol (CAST) and measurement system (optoelectronic system; Vicon, Oxford Metrics Group, UK). For this purpose, we developed an original approach based on three tests, which allowed to separately investigate: (1) the consequences on joint kinematics of the differences between protocols (Outwalk vs. CAST), (2) the accuracy of the hardware (Xsens vs. Vicon), and (3) the summation of protocols' differences and hardware accuracy (Outwalk + Xsens vs. CAST + Vicon). In order to assess joint-angles similarity, the coefficient of multiple correlation (CMC) was used. For test 3, the CMC showed that Outwalk + Xsens and CAST + Vicon kinematics can be interchanged, offset included, for hip, knee and ankle flexion-extension, and hip ab-adduction (CMC > 0.88). The other joint-angles can be interchanged offset excluded (CMC > 0.85). Tests 1 and 2 also showed that differences in offset between joint-angles were predominantly induced by differences in the protocols; differences in correlation by both hardware and protocols; differences in range of motion by the Xsens accuracy. Results thus support the commencement of a clinical trial of Outwalk on transtibial amputees.

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Section: Discussionmentioning

confidence: 78%

First in vivo assessment of “Outwalk”: a novel protocol for clinical gait analysis based on inertial and magnetic sensors

Ferrari

Cutti

Garofalo

et al. 2009

Med Biol Eng Comput

158

127

View full text Add to dashboard Cite

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“…Picerno et al [84] calculated waveform similarity of joint angle kinematics using the mean absolute error of each waveform compared to the mean of all recorded waveforms:…”

Section: Mean Absolute Errormentioning

confidence: 99%

Methods for Measuring Swallowing Pressure Variability Using High-Resolution Manometry

Jones

Meisner

Broadfoot

et al. 2018

Front. Appl. Math. Stat.

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Any movement performed repeatedly will be executed with inter-trial variability. Oropharyngeal swallowing is a complex sensorimotor action, and swallow-to-swallow variability can have consequences that impact swallowing safety. Our aim was to determine an appropriate method to measure swallowing pressure waveform variability. An ideal variability metric must be sensitive to known deviations in waveform amplitude, duration, and overall shape, without being biased by waveforms that have both positive and sub-atmospheric pressure profiles. Through systematic analysis of model waveforms, we found a coefficient of variability (CV) parameter on waveforms adjusted such that the overall mean was 0 to be best suited for swallowing pressure variability analysis. We then investigated pharyngeal swallowing pressure variability using high-resolution manometry data from healthy individuals to assess impacts of waveform alignment, pharyngeal region, and number of swallows investigated. The alignment that resulted in the lowest overall swallowing pressure variability was when the superior-most sensor in the upper esophageal sphincter (UES) reached half its maximum pressure. Pressures in the tongue base region of the pharynx were least variable and pressures in the hypopharynx region were most variable. Sets of 3-10 consecutive swallows had no overall difference in variability, but sets of two swallows resulted in significantly less variability than the other dataset sizes. This study identified variability in swallowing pressure waveform shape throughout the pharynx in healthy adults; we discuss implications for swallowing motor control.

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“…Thereafter, to meet the requirements of intra-and intersubject repeatability, the acquired data were represented relative to anatomical planes approximating the frontal, transverse, and sagittal anatomical plane. For this purpose, an anatomical calibration procedure was carried out that determines the orientation of such anatomical planes based on the identification, intrinsically repeatable, of selected anatomical landmarks (ALs) (Picerno et al 2008).…”

Section: Kinematics Acquisitionmentioning

confidence: 99%

“…The orientation of two non-parallel lines was determined with respect to the sensor technical reference frame (TF) by identifying lines connecting couple of ALs with a calibration device, equipped with two mobile pointers and carrying a MARG sensor, an active axis of which was aligned with the line joining the two pointers and, thus, joining the ALs. These non-parallel lined were used to determine the orthogonal axes of each anatomical frame (AF) through given geometric rules (Picerno et al 2008). To minimize problems related to ferro-magnetic disturbances, experiments were conducted in a controlled magnetic field environment.…”

Section: Kinematics Acquisitionmentioning

confidence: 99%

Neuromuscular control adaptations in elite athletes: the case of top level karateka

Sbriccoli

Camomilla

Mario³

et al. 2009

Eur J Appl Physiol

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This paper aimed at investigating the neuromuscular response of knee flexor and extensor muscles in elite karateka and karate amateurs (Amateurs) during isokinetic knee flexion/extensions and during the execution of a front kick (FK). Surface electromyograms (sEMG) were recorded from the right vastus lateralis (VL) and biceps femoris (BF) muscles with a four-array electrode during maximal isometric knee flexion and extension (maximal voluntary contraction), during isokinetic contractions (30 degrees , 90 degrees , 180 degrees , 270 degrees , 340 degrees , 400 degrees /s), and during the FK. The level of VL and BF agonist (ago) and antagonist (ant) activation during the isokinetic and FK protocols was quantified through normalized sEMG root mean square value (%RMS(ago/ant-ISOK/FK)). VL and BF average muscle fiber conduction velocity (CV) was computed for isokinetic and FK. Isokinetic flexion and extension torques and knee angular velocity during FK were also assessed. Analysis of variance was used to test the effect of group, angular velocity, and task on the assessed variables (P < 0.05). Elite karateka showed higher isokinetic knee flexion torque when compared with Amateurs. For all angular velocities, VL and BF %RMS(ant-isokinetic) were lower in elite karateka, while their BF-CV(isokinetic) BF-CV(front kick) and BF %RMS(ant-front kick) values were higher. For VL and BF, %RMS(ago-front kick) was lower than %RMS(ago-isokinetic) in both groups. Elite karateka demonstrated a typical neuromuscular activation strategy that seems task and skill level dependent. Knee flexion torque and CV results suggest the presence of an improved ability of elite karateka to recruit fast MUs as a part of training induced neuromuscular adaptation.

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Joint kinematics estimate using wearable inertial and magnetic sensing modules

Cited by 225 publications

References 23 publications

First in vivo assessment of “Outwalk”: a novel protocol for clinical gait analysis based on inertial and magnetic sensors

First in vivo assessment of “Outwalk”: a novel protocol for clinical gait analysis based on inertial and magnetic sensors

Methods for Measuring Swallowing Pressure Variability Using High-Resolution Manometry

Neuromuscular control adaptations in elite athletes: the case of top level karateka

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