Anticipatory judgements associated with vision of an opponent’s end-effector: An approach by motion perturbation and spatial occlusion

2018 ◽  
Vol 72 (5) ◽  
pp. 1131-1140
Author(s):  
Hirofumi Ida ◽  
Kazunobu Fukuhara ◽  
Motonobu Ishii ◽  
Tetsuri Inoue
Keyword(s):  
Visual Analogue Scale ◽  
Visual Information ◽  
Analogue Scale ◽  
Rotation Speed ◽  
Elbow Extension ◽  
End Effector ◽  
Tennis Players ◽  
Occlusion Model ◽  
Tennis Serve ◽  
The Individual

This study was aimed at determining how the visual information of an end-effector (racket) and the intermediate extremity (arm) of a tennis server contribute to the receiver’s anticipatory judgement of ball direction. In all, 15 experienced tennis players and 15 novice counterparts viewed a spatially occluded computer graphics animation of a tennis serve (no-occlusion, racket-occlusion, and body-occlusion) and made anticipatory judgements of ball direction on a visual analogue scale (VAS). The patterns of the serve motions were generated by a simulation technique that computationally perturbs the rotation speed of the selected racket-arm joint (forearm pronation and elbow extension) on a captured serve motion. The results suggested that the anticipatory judgements were monotonically attuned with the perturbation rate of the forearm pronation speed excepting under the conditions of the racket-occlusion model. Although such attunements were not observed in the elbow perturbation conditions, the results of correlation analysis indicated that the residual information in the spatially occluded models had a similar effect to the no-occlusion model within the individual experienced participants. The findings support the notion that end-effector (racket) provides deterministic cues for anticipation, as well as imply that players are able to benefit from the relative motion of an intermediate extremity (elbow extension).

scholarly journals Skill Level in Tennis Serve Return Is Related to Adaptability in Visual Search Behavior

2021 ◽  
Vol 12 ◽  
Author(s):  
Jernej Rosker ◽  
Ziva Majcen Rosker
Keyword(s):  
Visual Search ◽  
Hand Movement ◽  
National Level ◽  
Area Under The Curve ◽  
Search Strategies ◽  
Visual Behavior ◽  
Tennis Players ◽  
Machine Learning Model ◽  
Tennis Serve ◽  
The Individual

Analyzing visual search strategies in tennis is primarily focused on studying relationships between visual behavior and tennis performance. However, diverse movement characteristics among different servers suggest the importance of adjusting the visual search strategies of an individual while playing against different opponents. The aim of this study was to analyze whether visual search strategies can be attributed to the individual server and the returning player during the tennis serve return or return performance. Seventeen tennis players were enrolled in this study (five international players and 12 national players) producing a sample of 1,020 returns measured with mobile eye trackers. The random forest machine learning model was used to analyze the ability to classify the returning player [area under the curve (AUC): 0.953], individual server (AUC: 0.686), and return performance category (AUC: 0.667) based on the location and duration of the focal vision fixation. In international tennis players, the higher predictability of the server was observed as compared with national level players (AUC: 0.901 and 0.834, respectively). More experienced tennis players presented with a higher ability to adjust their visual search strategies to different servers. International players also demonstrated anticipatory visual behavior during the tossing hand movement and superior information pickup during the final phases of the stroke of a server.

scholarly journals An 8-Stage Model for Evaluating the Tennis Serve

2011 ◽  
Vol 3 (6) ◽  
pp. 504-513 ◽  
Author(s):  
Mark Kovacs ◽  
Todd Ellenbecker
Keyword(s):  
Stage Model ◽  
Kinetic Chain ◽  
Descriptive Model ◽  
Tennis Players ◽  
Overhead Athletes ◽  
Specific Analysis ◽  
Depth Analysis ◽  
Tennis Serve ◽  
Total Body ◽  
The Individual

Background: The tennis serve is a complex stroke characterized by a series of segmental rotations involving the entire kinetic chain. Many overhead athletes use a basic 6-stage throwing model; however, the tennis serve does provide some differences. Evidence Acquisition: To support the present 8-stage descriptive model, data were gathered from PubMed and SPORTDiscus databases using keywords tennis and serve for publications between 1980 and 2010. Results: An 8-stage model of analysis for the tennis serve that includes 3 distinct phases—preparation, acceleration, and follow-through—provides a more tennis-specific analysis than that previously presented in the clinical tennis literature. When a serve is evaluated, the total body perspective is just as important as the individual segments alone. Conclusion: The 8-stage model provides a more in-depth analysis that should be utilized in all tennis players to help better understand areas of weakness, potential areas of injury, as well as components that can be improved for greater performance.

Expertise Differences in Preparing to Return a Tennis Serve: A Visual Information Processing Approach

1989 ◽  
Vol 11 (4) ◽  
pp. 382-398 ◽  
Author(s):  
Claude Goulet ◽  
Chantai Bard ◽  
Michelle Fleury
Keyword(s):  
Visual Information ◽  
Sport Performance ◽  
Tennis Players ◽  
Visual Occlusion ◽  
Execution Phase ◽  
Study Results ◽  
Search Patterns ◽  
Preparatory Phase ◽  
Tennis Serve ◽  
And Behavior

Two experiments were conducted to analyze the performance of expert and novice tennis players. For testing purposes, 16-mm films were used. Subjects in both studies had to identify the type of serve presented (flat, top-spin, sliced). In Experiment 1, visual search patterns were investigated. During the ritual phase, experts focus on the shoulder/trunk areas whereas novices concentrate their search around the head of the server. During the execution phase, experts concentrate on the racquet whereas novices use more cues. Using the technique of temporal visual occlusion, the speed and accuracy of decisional processes were investigated in a second study. Results showed that expert players select valuable information during the preparatory phase and during the first part of. the execution phase. Novices must see the ritual phase until ball/racquet impact to be as accurate. Results emphasize the importance of combining sampling of eye movement and behavior parameters to sharpen our understanding of the perceptual processes underlying motor sport performance.

Intoxication Perception Visual Analogue Scale

2010 ◽  
Author(s):  
Jennifer R. Cromer ◽  
Jason A. Cromer ◽  
Paul Maruff ◽  
Peter J. Snyder
Keyword(s):  
Visual Analogue Scale ◽  
Analogue Scale

EFEKTIFITAS PENGGUNAAN TERAPI TRANSCUTANEUS ELECTRICAL NERVE STIMULATION (TENS) PADA PASIEN NYERI PUNGGUNG BAWAH DI RSUD dr. M HAULUSSY AMBON

2018 ◽  
pp. 70-78
Author(s):  
Ninik Maathia Sallatalohy ◽  
Mauren J Paliyama ◽  
Farah Ch Noya
Keyword(s):  
Visual Analogue Scale ◽  
Nerve Stimulation ◽  
Analogue Scale ◽  
Electrical Nerve Stimulation

Pendahuluan. Nyeri Punggung Bawah (NPB) merupakan suatu permasalahan yang paling sering ditemukan di masyarakat. Etiologinya tergolong kompleks dan dapat disebabkan oleh berbagai hal. Salah satu pilihan penatalaksanaan NPB adalah dengan terapi TENS. Tujuan. Tujuan penelitian ini adalah untuk mengetahui efektifitas terapi TENS pada pasien NPB di RSUD dr. M Haulussy Ambon. Metode. Desain penelitian yang digunakan adalah pretest–posttest design, dengan mengukur skala Visual Analogue Scale (VAS) sebelum dan setelah 5 kali terapi TENS. Jumlah subjek yang memenuhi kriteria sebanyak 71 dengan perbandingan laki-laki dan perempuan adalah 1:2. Hasil. Hasil uji Marginal Homogenity memperlihatkan perbedaan signifikansi sebelum dan setelah 5 kali terapi TENS (p = 0,000). Kesimpulan. TENS efektif dalam meredakan nyeri pada pasien NPB. Kata Kunci: Nyeri Punggung Bawah, TENS

A Novel Virtual Reality Technique (Cervigame®) Compared to Conventional Proprioceptive Training to Treat Neck Pain: A Randomized Controlled Trial

2019 ◽  
Vol 9 (3Jun) ◽  
Author(s):  
I Rezaei ◽  
M Razeghi ◽  
S Ebrahimi ◽  
S Kayedi ◽  
A Rezaeian Zadeh
Keyword(s):  
Virtual Reality ◽  
Visual Analogue Scale ◽  
Neck Pain ◽  
Analogue Scale ◽  
Controlled Trial ◽  
Neck Disability Index ◽  
Repeated Measure ◽  
Balance Test ◽  
Proprioceptive Training ◽  
Neck Disability

Background: Despite the potential benefits of virtual reality technology in physical rehabilitation, only a few studies have evaluated the efficacy of this type of treatment in patients with neck pain.Objective: The aim of this study was to compare the effects of virtual reality training (VRT) versus conventional proprioceptive training (CPT) in patients with neck pain.Methods: Forty four participants with nonspecific chronic neck pain were randomly assigned to VRT or CPT in this assessor-blinded clinical trial. A novel videogame called Cervigame® was designed for VRT. It comprises of 50 stages divided into unidirectional and two-directional stages ordered from easy to hard. CPT consisted of eye-follow, gaze stability, eye-head coordination and position and movement sense training. Both groups completed 8 training sessions over 4 weeks. Visual analogue scale score, neck disability index and Y-balance test results were recorded at baseline, immediately after and 5 weeks post-intervention. Mixed repeated measure ANOVA was used to analyze differences between mean values for each variable at an alpha level of 0.05.Results: There were significant improvements in all variables in both groups immediately after and 5 weeks after the intervention. Greater improvements were observed in the visual analogue scale and neck disability index scores in VRT group, and the results for all directions in Y-balance test were similar in both groups. No side effects were reported.Conclusion: Improvements in neck pain and disability were greater in VRT than CPT group. Cervigame® is a potentially practical tool for rehabilitation in patients with neck pain.

Depression, pain, and site:

1999 ◽  
Vol 15 (1) ◽  
pp. 10-17
Author(s):  
Molina Omar Franklin ◽  
Tavares Gimenes Pablo ◽  
Aquilino Raphael ◽  
Rank Rise ◽  
Coelho Santos Zeila ◽  
...  
Keyword(s):  
Visual Analogue Scale ◽  
Beck Depression Inventory ◽  
Temporomandibular Disorders ◽  
Analogue Scale ◽  
Epidemiological Data ◽  
Depression Severity ◽  
Internal Joint ◽  
The Difference ◽  
Biomechanical Tests

Objective: To assess the level of depression, severity of pain and pain in single/multiple sites in patients with different severity of bruxing behavior and Temporomandibular Disorders (TMDs). Methods: We evaluated 131 patients with bruxism and TMDs: 20 patients with mild bruxism, 42 patients with moderate bruxism, 45 patients with severe bruxism and 24 patients with extreme bruxism. We used the Beck Depression Inventory (BDI), clinical examination, a questionnaire of clinical epidemiological data, criteria for TMDs and bruxism, palpation of muscles and joints, the Visual Analogue Scale for pain, classification of the occlusion and biomechanical tests to assess for internal joint derangements. Results: The level of depression increased from the mild, to the moderate, severe and extreme bruxing behavior groups, but the difference was significant only from the mild to the extreme group (p<0.001). Pain levels increased from the mild and moderate to the severe and extreme subgroups, but were not statistically significant. Mean number of pain sites increased from the mild, to the moderate, severe and extreme subgroup and the difference was extremely significant (p<0.0001). Conclusion: Levels of depression, severity of pain and pain sites increased with severity of bruxing behavior. A higher number of pain sites with more severe bruxism indicates somatization in bruxers, but a further study using the same protocol and a psychological test for somatization would be indicated to further substantiate these findings.

EFFICACY OF TRANSVERSUS ABDOMINIS PLANE BLOCK FOR POST CESAREAN DELIVERY ANALGESIA

2018 ◽  
Vol 8 (5) ◽  
pp. 37-41
Author(s):  
Minh Nguyen Van ◽  
Nga Bui Thi Thuy ◽  
Thinh Tran Xuan
Keyword(s):  
Caesarean Section ◽  
Visual Analogue Scale ◽  
Analogue Scale ◽  
Transversus Abdominis Plane Block ◽  
Transversus Abdominis ◽  
Morphine Consumption ◽  
Block Group ◽  
Tap Block ◽  
Transversus Abdominis Plane ◽  
Pain Scores

Background: The transversus abdominis plane block (TAP block), a regional block, provides effective analgesia after lower abdominal surgeries. The objective of this study was to assess whether transversus abdominis plane block is effective as part of multimodal pain management following Cesarean section. Materials and Method: Totally, 60 ASA I and II parturients for Cesarean section via Pfannenstiel incision under spinal anesthesia were randomly allocated to either the TAP block group or the control. The TAP block group received a landmark-orientated, bilateral TAP block with 0.25% levobupivacain 17,5ml each side in the triangle of Petit. Postoperative pain treatment followed the same protocole for both groups with 1gram paracetamol intravenously and received patrient-controlled analgesia with intravenous morphine. The time to first request of analgesic, morphine consumption, visual analogue scale (VAS) pain scores and side effects were scored at 2, 4, 6, 8, 12 h postoperatively. Results: The time to first request of analgesic was longer, morphine consumption was lower in TAP group than in the control (p < 0.05). Visual analogue scale (VAS) pain scores at rest and on mouvement were similar in two groups at 2h, but lower in TAP group from 4h (p < 0.05). No severe adverse effects were detected in two groups. Conclusion: TAP block prolonged the time to fisrt request of analgesic and reduced morphine consumption, the VAS pain scores significantly both at rest and on mouvement. Therefore, TAP block is feasible and effective as part of a multimodal analgesia regimen after Caesarean section. Key words: Caesarean section, multimodal pain management, transversus abdominis plane block

Sign in / Sign up

Export Citation Format

Share Document