Different contributions of efferent and reafferent feedback to sensorimotor temporal recalibration

Adaptation to delays between actions and sensory feedback is important for efficiently interacting with our environment. Adaptation may rely on predictions of action-feedback pairing (motor-sensory component), or predictions of tactile-proprioceptive sensation from the action and sensory feedback of the action (inter-sensory component). Reliability of temporal information might differ across sensory feedback modalities (e.g. auditory or visual), which in turn influences adaptation. Here, we investigated the role of motor-sensory and inter-sensory components on sensorimotor temporal recalibration for motor-auditory (button press-tone) and motor-visual (button press-Gabor patch) events. In the adaptation phase of the experiment, action-feedback pairs were presented with systematic temporal delays (0 ms or 150 ms). In the subsequent test phase, audio/visual feedback of the action were presented with variable delays. The participants were then asked whether they detected a delay. To disentangle motor-sensory from inter-sensory component, we varied movements (active button press or passive depression of button) at adaptation and test. Our results suggest that motor-auditory recalibration is mainly driven by the motor-sensory component, whereas motor-visual recalibration is mainly driven by the inter-sensory component. Recalibration transferred from vision to audition, but not from audition to vision. These results indicate that motor-sensory and inter-sensory components contribute to recalibration in a modality-dependent manner.

Effect of proprioceptive sensation and feedback required for motor learning on function, activity, and daily life behavior of patients after nerve injury

Purpose: This study investigated the effects of modified mirror therapy and taping therapy for providing feedback on upper extremity function, activity, and daily activities of stroke patients. Methods: This study was conducted with 20 stroke patients and randomly assigned 10 subjects to the experimental group and 10 to the control group. In the experimental group, after proprioceptive neuromuscular stimulation treatment, the mirror therapy program was implemented. In the control group, upper extremity taping was performed before proprioceptive neuromuscular facilitation treatment. In this study, a prior evaluation using JTT, FIM, and MAL was performed before intervention to evaluate the patient's function and daily life behavior. Post-tests were performed after the last treatment. Results: In the paired-sample T-test used for within-group comparison of JTTs, FIM, and MAL, there was a significant difference between pre- and post-test for all groups. But there was no statistically significant difference between experimental group 1 and experimental group 2 in an independent t-test conducted to compare the effect sizes of treatments. Conclusion: In other words, by applying mirror therapy and taping therapy that can increase proprioceptive sensation and feedback information in stroke patients, upper extremity function and daily activities can be increased.

Efferent and Afferent Connections of the Supratrigeminal Neurons Conveying Orofacial Muscle Proprioception in Rats

The supratrigeminal nucleus (Su5) is a key structure for controlling jaw-movements since it receives proprioceptive sensation from jaw-closing muscle spindles (JCMSs) and sends projection to the trigeminal motor nucleus (Mo5). However, the central projection and regulation of JCMS proprioceptive sensation have not been fully understood. Therefore, we aimed to reveal the efferents and afferents of the Su5 by means of neuronal tract tracings. Anterograde tracer injections into the Su5 revealed that the Su5 sent contralateral projections (or bilateral projections with a contralateral predominance) to the Su5, basilar pontine nuclei, pontine reticular nucleus, deep mesencephalic nucleus, superior colliculus, caudo-ventromedial edge of ventral posteromedial thalamic nucleus, parafascicular thalamic nucleus, zona incerta, and lateral hypothalamus, and ipsilateral projections (or bilateral projections with an ipsilateral predominance) to the intertrigeminal region, trigeminal oral subnucleus, dorsal medullary reticular formation, and hypoglossal nucleus as well as the Mo5. Retrograde tracer injections into the Su5 demonstrated that the Su5 received bilateral projections with a contralateral predominance (or contralateral projections) from the primary and secondary somatosensory cortices, granular insular cortex and Su5, and ipsilateral projections (or bilateral projections with an ipsilateral predominance) from the dorsal peduncular cortex, bed nuclei of stria terminalis, central amygdaloid nucleus, lateral hypothalamus, parasubthalamic nucleus, trigeminal mesencephalic nucleus, parabrachial nucleus, juxtatrigeminal region, trigeminal oral and caudal subnuclei, and dorsal medullary reticular formation. These findings suggest that the Su5 receiving JCMS proprioceptive sensation has efferent and afferent connections with multiple brain regions, which are involved in emotional and autonomic functions as well as orofacial motor functions.

Sensorimotor temporal recalibration: the contribution of motor-sensory and inter-sensory components

Adaptation to delays between actions and sensory feedback is important for efficiently interacting with our environment. Adaptation may rely on predictions of action-feedback pairing (motor-sensory component), or predictions of tactile-proprioceptive sensation from the action and sensory feedback of the action (inter-sensory component). Reliability of temporal information might differ across sensory feedback modalities (e.g. auditory or visual), influencing adaptation. Here, we investigated the role of motor-sensory and inter-sensory components on sensorimotor temporal recalibration for motor-auditory events (button press-tone) and motor-visual events (button press-Gabor patch). In the adaptation phase of the experiment, the motor action-feedback event pairs were presented with systematic temporal delays (0ms or 150ms). In the subsequent test phase, sensory feedback of the action were presented with variable delays. The participants were then asked whether this delay could be detected. To disentangle motor-sensory from inter-sensory component, we varied movements (active button press or passive depression of button) at adaptation and test. Our results suggest that motor-auditory recalibration is mainly driven by motor-sensory component, whereas motor-visual recalibration is mainly driven by inter-sensory component. Recalibration transferred from vision to audition, but not from audition to vision. These results indicate that motor-sensory and inter-sensory components of recalibration are weighted in a modality-dependent manner.

Touching Feeling Transmission

Touch Workshop is a multimodal set of experiments that untangle the ideological orientation of the senses, organized around proprioceptive sensation and arriving at inverted performances. The project builds on the tactile research of Czech polymath Jan Švankmajer, his response to the censorship of his work in the 1970s. With Covid-19 a pervasive reality, touch is limited and vision dominates. How can the tactile imagination respond in the absence of tactile freedom? How do we transfer and transmit feeling, touching those outside of our time-space?

Sports Injury Prevention and Functional Training: A Literature Review

OBJECTIVES The aim of this review study was to proposes a new paradigm of functional injury prevention(FIP) based on analysis of the effects of sports injury prevention(SIP) and functional training(FT).METHODS The literature used in the study is based on the electronic database and international papers published from 2014 to 2021 related to functional training were searched, screened and evaluated by using the follow keywords: <i>functional training, sports injury, rehabilitation, and prevention</i>.RESULTS FT was divided into the concept of training both improving the sports performance and restoring physical function in the field of rehabilitation. In two areas, FT and SIP are somewhat different in approach method, object and environment, but they are highly correlated that both the activation of proprioceptive sensation and integrated neuromuscular function are reflected in training program. Especially, intrinsic injury factors such as reduced physical ability, skills and conditioning are associated with reduction of sports performance and increased sports injury. In addition, decreased proprioceptive sensation and neuromuscular function is a typical symptom of reduction of sports performance and injury. Therefore, FIP is needed as a training program that not only to prevent sports injury but also to improve sports performance.CONCLUSIONS In this review study, FIP is propose as a new paradigm combining SIP and FT. The follow-up study of FIP should be reviewed on athletes, club members and the general public for the development of programs to prevent sports injury and improve sports performance and the effects by sports events, body parts and age.

Early correctional and pedagogical assistance to children with autism as a means of improving their quality of life

The present article deals with the organization and implementation of correctional care for younger children with autism spectrum disorders. The authors reveal key aspects of the problems underlying the speech and nonspeech difficulties of this category of children, as well as consider the topic of the only generally accepted method (applied behavior analysis) that is widely used when working with these children, and prove the expediency of a different approach to the complex correction of speech problems in children with communication disorders. The approach is based on the identified peculiarities of the speech and nonspeech problems of children with autism. The authors justify the choice of contemporary foreign methods (Tomatis, Floortime, and Sensory Integration) in the correction of speech and behavior of children with communication disorders based on the results of the conducted ascertaining experiment. Based on a comparative analysis of the results of ascertaining and forming experiments in the control and experimental groups, it has been proved experimentally that establishing an emotional and communicative component of the mental development of the child, as well as improving the processing of auditory, tactile, vestibular, and proprioceptive sensation speed up the corrective process that plays a crucial role in speech development and the development of nonlanguage functions. The significance of this study concerns the evidence-based use of a comprehensive approach to the correction of children with autism in the sensitive period of their development (from two to four years). Early comprehensive care provides a chance to achieve success in the social and speech development of these children by the beginning of school education (from seven to eight years), which will significantly improve the quality of their lives and contribute to the best integration into society.