Skeletal muscle interaction synergetic effects during a complex acyclic motor action performing

The study showed the sambo wrestlers’ muscle synergies’ spatial-temporal structure, extracted using the PCA method. We considered the individual periods of the "leg grabbing" throw coordination structure. It was revealed the electrical activity of extensive synergies changes depending on registered muscular efforts values, typical for different periods of the performed movement. The synergetic effects of skeletal muscle interaction demonstrate plasticity, manifested in typical patterns of spatial and temporal activation of revealed muscle synergies, which ensures reliable control of motor function in various periods of complex movement coordination performing. Key words: muscle synergies; synergetic effects; intermuscular coordination; motion control, skeletal muscle.

Dance

The study of dance can be summed up as the four Ps: patterning, partnering, pacing, and person. Patterning is about the intra- and interpersonal processes used in creating complex movement patterns in space and time. Partnering in dance involves the coordinated movement of multiple dancers, generally in defined spatial configurations, sometimes occurring through direct body contact. Next, pacing in dance refers to the synchronization of movement patterns with both musical beats and interaction partners. Finally, the person aspect of dance deals with how dancers are able to engage in acting by portraying characters in narrative forms of dance and to tell stories with their bodies in a wordless manner using iconic and affective gestures.

Phonological restrictions on nominal pluralization in Sign Language of the Netherlands: evidence from corpus and elicited data

This study focuses on nominal pluralization in Sign Language of the Netherlands (NGT). The aim is to offer a comprehensive description of nominal pluralization processes in the language, based on both corpus data and elicited data, taking into account potential phonological restrictions. The results reveal that NGT nouns can undergo several pluralization processes, the main ones being simple reduplication (i.e., repeating the noun sign at one location) and sideward reduplication (i.e., repeating the noun sign while moving the hand sideward). The choice of pluralization process depends on phonological properties of the base noun: (i) nouns that are body-anchored or involve a complex movement undergo simple reduplication; (ii) nouns articulated at the lateral side of the signing space undergo sideward reduplication; (iii) nouns articulated on the midsagittal plane can undergo both simple and sideward reduplication. Strikingly, the data show considerable variation, and all types of nouns can be zero-marked, that is, plural marking on the noun is not obligatory. The results further suggest that all nouns can undergo at least one type of reduplication. Thus, while phonological properties of the base noun influence the type of reduplication, they do not block reduplication altogether. Plural reduplication in NGT is therefore less constrained than has been reported for other sign languages, where certain noun types cannot undergo reduplication. This shows that reduplication – despite being iconically motivated – is subject to language-specific grammatical constraints.

Phonological restrictions on nominal pluralization in Sign Language of the Netherlands: evidence from corpus and elicited data

This study focuses on nominal pluralization in Sign Language of the Netherlands (NGT). The aim is to offer a comprehensive description of nominal pluralization processes in the language, based on both corpus data and elicited data, taking into account potential phonological restrictions. The results reveal that NGT nouns can undergo several pluralization processes, the main ones being simple reduplication (i.e., repeating the noun sign at one location) and sideward reduplication (i.e., repeating the noun sign while moving the hand sideward). The choice of pluralization process depends on phonological properties of the base noun: (i) nouns that are body-anchored or involve a complex movement undergo simple reduplication; (ii) nouns articulated at the lateral side of the signing space undergo sideward reduplication; (iii) nouns articulated on the midsagittal plane can undergo both simple and sideward reduplication. Strikingly, the data show considerable variation, and all types of nouns can be zero-marked, that is, plural marking on the noun is not obligatory. The results further suggest that all nouns can undergo at least one type of reduplication. Thus, while phonological properties of the base noun influence the type of reduplication, they do not block reduplication altogether. Plural reduplication in NGT is therefore less constrained than has been reported for other sign languages, where certain noun types cannot undergo reduplication. This shows that reduplication – despite being iconically motivated – is subject to language-specific grammatical constraints.

Relationship between Asymmetries Measured on Different Levels in Elite Basketball Players

In this study, we investigated the association of magnitude and agreement in direction between asymmetries measured on single-joint (hip and trunk), complex movement (jumping), and skill (change of direction (CoD)) levels. The study sample comprised 43 junior- and senior-level (age = 20.5 ± 6.0 years; height = 194.5 ± 7.2 cm; body mass = 86.8 ± 10.1 kg) elite male basketball players. Both limbs/sides were tested in hip and trunk isometric strength; passive range of motion (RoM); unilateral, horizontal, and vertical jumping; and CoD tests, from which asymmetry indexes were calculated. The associations between asymmetry magnitudes were calculated with Spearman’s ρ correlation coefficient. The agreement between the direction of asymmetries on different levels was calculated with Cohen’’s Kappa (κ) coefficient. The average magnitude of asymmetry varied substantially (2.9–40.3%). Most associations between asymmetry magnitudes measured on different levels were small and statistically non-significant, with a few exceptions of moderate and large associations. Asymmetry in single-leg countermovement jump parameters was strongly associated with hip abduction maximal strength (ρ = 0.58 and 0.50, p < 0.01). Agreement between asymmetry directions was slight to fair, with a few moderate exceptions. Results indicate that multiple tests are needed to obtain a comprehensive picture of athletes’ asymmetries and that universal thresholds and golden standard tests for return to play should be reconsidered and reinvestigated.

Hydrological Modeling in Water Cycle Processes

The water cycle shows the continuous and complex movement of water within the earth and atmosphere in which water moves from the land and ocean surface to the atmosphere and back in form of precipitation [...]

Monitoring and evaluating body knowledge: metaphors and metonymies of body position in children’s music instrument instruction

This paper examines music instrument teachers’ instructive use of noun metaphors and metonymies of behaviors related to the playing and handling of a musical instrument. Drawing on 10 video-recorded 30–40 min-long instrument lessons as data, and conversation analysis as a method, the paper examines the temporal location of these figurative turns (i.e., instruction turns including a noun metaphor or metonymy) within the instructional activities and in relation to the student’s behaviors. At the beginning of a new instructional sequence, a figurative turn allows the teacher to test and monitor the level of student’s knowledge, while the student orients to a need to demonstrate that knowledge. Figurative turns also enable the teacher to initiate correction in complex movement sequences, its organization as a series of metaphors or metonymies enabling an easy return to an earlier point in a sequence. Furthermore, the flexibility of metaphors and metonymies as interactional resources is evidenced by the ease by which a figurative instruction turn may be transformed into an affirmative evaluation of student conduct. The paper thus suggests that instructing body knowledge through metaphors and metonymies has significant pedagogical advantages, also providing a detailed account for why and how this is the case.

Role of Electromyography(EMG) for (Muscle Conductivity) management of Paralyzed Patients in Dhaka city

The purpose of this study is to assess the electromyography (EMG) signals of biceps muscle of paralyzed patients to know the condition of their affected muscle. For measuring the muscle signal, 5 voltages analog signal is sent to biceps muscle via EMG sensor with Arduino. As higher the voltage is, the condition of the muscle status is better. In this study, we have observed paralyzed patients in Dhaka city having different kinds of paralysis patients like Complete paralysis, Partial or incomplete paralysis and localized paralysis. The study also focused on monitoring different stage of paralysis like Flaccidity, dealing with appearance of spasticity, increased spasticity or decreased spasticity, complex movement combination, spasticity disappear and normal function return. This observational study was carried out in three largest and tertiary care hospitals located in Dhaka metropolitan area with the help of Myoware EMG based muscle sensor. Total 50 paralyzed cases were included in this study. Among the 50 cases of paralyzed patients, majority of the cases (55%) were of 40-55 years aged group where 75% were male and 25% were female. In this study, 85% were Localized paralyzed patients, 10% Partial paralyzed and 5% Complete paralyzed. This study also shows the condition of healthy biceps muscle as compared with paralyzed muscle. The findings of this study could play an important role to observe the condition of paralyzed muscle for better management of paralyzed patients and give a clear idea about which management is needed.

The possibility to apply the Frenet trihedron and formulas for the complex movement of a point on a plane with the predefined plane displacement

Material particles interact with the working moving surfaces of machines in various technological processes. Mechanics considers a technique to describe the movement of a point and decompose the speed and acceleration into single unit vectors of the accompanying trajectory trihedron for simple movement. The shape of the spatial curve uniquely sets the movement of the accompanying Frenet trihedral as a solid body. This paper has considered the relative movement of a material particle in the static plane of the accompanying Frenet trihedron, which moves along a flat curve with variable curvature. Frenet formulas were used to build a system of differential equations of relative particle movement. In contrast to the conventional approach, the chosen independent variable was not the time but the length of the arc of the guide curve along which the trihedron moves. The system of equations has been built in the projections onto the unit vectors of the moving trihedron; it has been solved by numerical methods. The use of the accompanying curve trihedron as a moving coordinate system makes it possible to solve the problems of the complex movement of a point. The shape of the curve guide assigned by parametric equations in its length function determines the portable movement of the trihedron and makes it possible to use Frenet formulas to describe the relative movement of a point in the trihedron system. This approach enables setting the portable movement of the trihedron osculating plane along a curve with variable curvature, thereby revealing additional possibilities for solving problems on a complex movement of a point at which rotational motion around a fixed axis is a partial case. The proposed approach has been considered using an example of the relative movement of cargo in the body of a truck moving along the road with a curvilinear axis of variable curvature. The charts of the relative trajectory of cargo slip and the relative speed for the predefined speed of the truck have been constructed