Effect of the position of the interphalangeal joint on movements of the trapeziometacarpal joint during thumb opposition

2022 ◽  
pp. 175319342110658
Author(s):  
Hiroshi Kurumadani ◽  
Kazuya Kurauchi ◽  
Shota Date ◽  
Yosuke Ishii ◽  
Toru Sunagawa
Keyword(s):  
Motion Capture ◽  
Muscle Activity ◽  
Interphalangeal Joint ◽  
Joint Position ◽  
Joint Movement ◽  
Trapeziometacarpal Joint ◽  
Thenar Muscle ◽  
Simple Method ◽  
Joint Flexion ◽  
Healthy Participants

The Kapandji test is a simple method to score thumb opposition; however, the position of the interphalangeal joint of the thumb during this test has not been described. We aimed to quantitatively examine the effect of the thumb interphalangeal joint position on movements of the trapeziometacarpal joint during thumb opposition using the Kapandji test. The Kapandji test was carried out in 20 healthy participants during thumb interphalangeal joint extension and flexion. Movements of the joints and the activity of thenar muscles were recorded using motion capture and electromyography, respectively. We found that interphalangeal joint extension increased the trapeziometacarpal joint movement and thenar muscle activity compared with interphalangeal joint flexion, which contributed to thumb opposition at Kapandji Positions 0–6. These findings suggest the position of the thumb interphalangeal joint affects the trapeziometacarpal joint during thumb opposition, and assessment of thumb opposition using the Kapandji test is best done with the thumb interphalangeal joint in extension.

Modeling the resistance mechanism of passive knee joint flexion and extension for use in rehabilitation equipment

2021 ◽  
pp. 095441192199013
Author(s):  
Mansoor Amiri ◽  
Farhad Tabatabai Ghomsheh ◽  
Farshad Ghazalian
Keyword(s):  
Knee Joint ◽  
Sagittal Plane ◽  
Resistance Mechanism ◽  
Time Dependent ◽  
Coefficient Of Determination ◽  
Joint Movement ◽  
Elastic Coefficient ◽  
Knee Movement ◽  
Joint Flexion ◽  
Flexion And Extension

The purpose of this study was to model the resistance mechanism of Passive Knee Joint Flexion and Extension to create a similar torque mechanism in rehabilitation equipment. In order to better model the behavior of passive knee tissues, it is necessary to exactly calculate the two coefficients of elasticity of time-independent and time-dependent parts. Ten healthy male volunteers (mean height 176.4+/−4.59 cm) participated in this study. Passive knee joint flexion and extension occurred at velocities of 15, 45, and 120 (degree/s), and in five consecutive cycles and within the range of 0 to 100° of knee movement on the sagittal plane on Cybex isokinetic dynamometer. To ensure that the muscles were relaxed, the electrical activity of knee muscles was recorded. The elastic coefficient, (KS) increased with elevating the passive velocity in flexion and extension. The elastic coefficient, (KP) was observed to grow with the passive velocity increase. While, the viscous coefficient (C) diminished with passive velocity rise in extension and flexion. The heightened passive velocity of the motion resulted in increased hysteresis (at a rate of 42%). The desired of passive velocity is lower so that there is less energy lost and the viscoelastic resistance of the tissue in the movement decreases. The Coefficient of Determination, R2 between the model-responses and experimental curves in the extension was 0.96 < R2 < 0.99 and in flexion was 0.95 < R2 < 0.99. This modeling is capable of predicting the true performance of the components of passive knee movement and we can create a resistance mechanism in the rehabilitation equipment to perform knee joint movement. Quantitative measurements of two elastic coefficients of Time-independent and Time-dependent parts passive knee joint coefficients should be used for better accurate simulation the behavior of passive tissues in the knee which is not seen in other studies.

Postburn Nailfold Retraction: A Reconstructive Technique

1986 ◽  
Vol 11 (3) ◽  
pp. 385-387
Author(s):  
R. C. K. NGIM ◽  
K. SOIN
Keyword(s):  
Interphalangeal Joint ◽  
Distal Interphalangeal Joint ◽  
Transposition Flap ◽  
Left Thumb ◽  
Nail Deformity ◽  
Distal Interphalangeal ◽  
Joint Flexion ◽  
Reconstructive Technique

Postburn nailfold retraction often results in nail deformity and loss of distal interphalangeal joint flexion. A technique of reconstruction of the nailfold using a proximally based transposition flap is described in a patient with postburn nailfold retraction of the left thumb, index and middle fingers.

Central patterning and reflex control of antennular flicking in the hermit crab Pagurus alaskensis (Benedict)

1975 ◽  
Vol 63 (1) ◽  
pp. 17-32
Author(s):  
P. J. Snow
Keyword(s):  
Hermit Crab ◽  
Functional Significance ◽  
Sensory Feedback ◽  
Sensory Input ◽  
Spike Frequency ◽  
Joint Movement ◽  
Trigger System ◽  
System A ◽  
Joint Flexion ◽  
Reflex Control

1. The effects of altering sensory input on the motoneuronal activity underlying antennular flicking have been tested. 2. Removal of the short segments of the outer flagellum results in a reduction of the number of spikes/burst in the fast flexor motoneurones A31F and A32F. 3. During a flick the delay between the burst in motoneurone A31F and the burst in motoneurone A32F is insensitive to alteration of sensory input. 4. Sensory feedback from the flexion phase of a flick is necessary for the activation of either extensor motoneurone. Evidence is presented to suggest that this feedback is primarily from joint-movement receptors at the MS-DS and DS-OF joints. 5. The results are incorporated into a model in which the patterns of flexor activity result from some specified properties of three components: a trigger system, a follower system, and the spike initiating zone of the flexor motoneurones. The trigger system determines when a flick will occur. The follower system determines the number of flexor spikes during a flick. Properties of the spike initiating zone determine the spike frequency and the timing between bursts in the flexor motoneurones. Extensor activity in the model is reflexively elicited by feedback from phasic, unidirectional receptors sensitive to joint flexion. 6. The functional significance of reflex control of extensor activity is discussed in relation to the form and proposed function of antennular flicking. It is suggested that this form of control is adapted to the function of antennular flicking because flexion at the MS-DS joint is not always necessary for the fulfilment of the fuction of a flick.

scholarly journals A Textile Sensor for Long Durations of Human Motion Capture

Sensors ◽  
2019 ◽  
Vol 19 (10) ◽  
pp. 2369 ◽  
Author(s):  
Sufeng Hu ◽  
Miaoding Dai ◽  
Tianyun Dong ◽  
Tao Liu
Keyword(s):  
Knee Joint ◽  
Motion Capture ◽  
Sports Medicine ◽  
Low Cost ◽  
Movement Analysis ◽  
Human Motion ◽  
Joint Movement ◽  
Human Motion Capture ◽  
Knee Joint Motion ◽  
Textile Sensor

Human posture and movement analysis is important in the areas of rehabilitation, sports medicine, and virtual training. However, the development of sensors with good accuracy, low cost, light weight, and suitability for long durations of human motion capture is still an ongoing issue. In this paper, a new flexible textile sensor for knee joint movement measurements was developed by using ordinary fabrics and conductive yarns. An electrogoniometer was adopted as a standard reference to calibrate the proposed sensor and validate its accuracy. The knee movements of different daily activities were performed to evaluate the performance of the sensor. The results show that the proposed sensor could be used to monitor knee joint motion in everyday life with acceptable accuracy.

A simple method of identification of 1U and 1R portals in trapeziometacarpal joint arthroscopy

2020 ◽  
pp. 175319342095200
Author(s):  
RaviKanth Mallina ◽  
Lawrence Chun-Man Lau ◽  
Michael Chu-Kay Mak ◽  
Pak-Cheong Ho
Keyword(s):  
Trapeziometacarpal Joint ◽  
Simple Method

Quantitative Analysis of the Linkage between the interphalangeal Joints of the Index Finger

1995 ◽  
Vol 20 (5) ◽  
pp. 696-699 ◽  
Author(s):  
P. HAHN ◽  
H. KRIMMER ◽  
A. HRADETZKY ◽  
U. LANZ
Keyword(s):  
System Analysis ◽  
Measuring System ◽  
Dominant Hand ◽  
Rectangular Coordinate System ◽  
Simple Method ◽  
Significant Difference ◽  
Pip Joint ◽  
Distal Interphalangeal ◽  
Joint Flexion ◽  
Opening And Closing

We have established a simple method of measuring joint motion under physiological conditions. For this purpose we use an ultrasound measuring system employing marker points consisting of miniaturized ultrasound transmitters. This device was tested on a simple biomeehanical model, the linkage of the proximal and distal interphalangeal joints. The angles of these joints were recorded during opening and closing of the fist in 34 index fingers of 17 healthy persons. The results of the measurements were plotted on a rectangular coordinate system. Analysis showed an approximately linear linkage between the IP joints of the index linger. The curve for extension was the same as that for flexion. The linkage varies greatly. On average 1° of PIP joint flexion is equivalent to 0.76° of DIP joint flexion. Our study showed no significant difference between the dominant and non-dominant hand. The results showed that there is a linear linkage between the proximal and distal interphalangeal joints, which is equal for flexion and extension.

Study of the interaction between knee joint position, joint loads, and muscle activity at the knee

1983 ◽  
Vol 16 (4) ◽  
pp. 295-296
Author(s):  
T.P. Andriacchi ◽  
G.B.J. Andersson ◽  
R. Ortengren ◽  
R. Mikosz
Keyword(s):  
Knee Joint ◽  
Muscle Activity ◽  
Joint Position ◽  
Joint Loads
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