RELATIONSHIP BETWEEN THE BALL VELOCITY AND UPPER EXTREMITY KINEMATICS DURING AN OVERARM THROWING SELF-PRACTICE PROGRAM

The purpose of this study was to investigate the relationship between the ball velocity and upper extremity kinematics in inexperienced individuals during a 5 weeks selfpractice overarm throwing. Seven women participated in this study. Participants performed 15 overarm throwing 3 days in a week for 5 weeks. The relationship between the ball velocity and the first-last week overarm throwing upper extremity kinematics data (maximum angles and angular velocities) were statistically analyzed using Spearman’s rho. Results showed there was weak to moderate relationship for both maximum angles and angular velocities of trunk, shoulder, and elbow. Rotational movements of upper extremities should be prioritized at the early stages of throwing skills acquisitions

RELATIONSHIP BETWEEN THE SEQUENTIAL MOVEMENT, MUSCLE CO-CONTRACTION AND KLNEMATLC VARIABLES OF FLYING DISC BACKHAND THROWING

The aim of this study was to analyse sequential movement of segments and co-contraction index and its correlation with kinematic variables. Disc trajectory and velocity (DV) variables calculated according to the medio-lateral (DOM) and vertical (DOV) displacement. The time differences calculated according to maximum linear velocity of segments from proximal to distal and reported as shoulder & elbow (S-E), elbow & wrist (E-W), wrist & finger (W-F). Co-contraction index (CI) were calculated for flexor and extensor carpi radialis. DV and S-E, W-F, DOM showed correlation which may be caused by the sequential movement of S-E, W-F and the displacement of the disc. Also, there was a correlation between the CI, DOM and DOV. Therefore, decrease of time gap between the segment movements and higher CI may increase the DV effectively

Coupling angle variability of upper extremity during 5 weeks overarm throwing self-practice

The role of variability is still unknown for biomechanists whether it's useful or not for the performance or skill learning. The aim of this study was to investigate coupling angle variability (CAV) at the early phase of skill acquisition of overarm throwing without any feedback about the result or performance. 7 healthy female without any throwing experience participated in this study. Each participant participated a total of 15 sessions in the laboratory (3 days in a week x 5 weeks). Coupling angle variability of angle-angle diagrams (AAD) calculated for combinations of trunk flexion (TF) –lateral flexion(TL), humeral elevation (HE)- humeral plane of elevation (HP), elbow flexion-extension(EF). There were no significant changes for CAV, however individual AADs showed different patterns for each individual. For understanding the role of the variability in skill learning or performance, individual variability analysis may give information better than the group means

Sorbitan sesquioleate: a rare contact allergen that is also an important indicator of allergic contact dermatitis from crossreacting compounds as well as for false-positive fragrance allergy

Background Controversy exists about the addition of sorbitan sesquioleate (SSO) to the European baseline series for concomitant patch testing, particularly with fragrance mix (FM) I and Myroxylone pereirae (MP), which both contain SSO as an emulsifier. Aim To investigate SSO contact sensitization and concomitant positive patch test reactions to FM I or MP in Turkey. Methods This was a retrospective analysis of 840 patients consecutively patch tested with SSO 20% petrolatum between 1996 and 2020. Results The prevalence of SSO sensitization was 0.6% (5 of 840). In four of the five patients, clinical relevance could be established from SSO crossreactants, mainly in moisturizers and topical pharmaceuticals other than corticosteroids. Positive patch test reactions with unknown clinical relevance were observed to FM I or MP (both containing 5% SSO) in 71.4% of patients with a positive/questionable positive reaction to SSO (P < 0.001) and to other patch test allergens containing 1-5% SSO. Conclusions SSO was a very good indicator for positive patch test reaction with unknown clinical relevance to fragrances and other allergens containing 1-5% SSO. We suggest that SSO should be tested as a negative control with any commercially available patch test allergen containing SSO at any concentration. Moreover, clinicians should be alert for SSO synonyms and for other sorbitan derivatives in product labels, as SSO itself might not be the culprit but an indicator for crossreacting allergens

A recalcitrant case of Jacquet erosive diaper dermatitis after surgery for Hirschsprung disease in a boy with Waardenburg-Shah syndrome

We herein present a 4 year-old boy with Waardenburg-Shah syndrome who developed Jacquet erosive diaper dermatitis following a total colectomy and ileoanal anastomosis procedure for Hirschsprung disease. The diagnosis was made according to history and typical clinical findings. Complete resolution of the recalcitrant lesions after an ileostomy procedure supported the diagnosis. This case highlights the importance of being familiar with the predisposing factors and clinical presentation of this rare and severe form of chronic irritant dermatitis, since it may easily be misdiagnosed as other diseases in children and may lead to unnecessary diagnostic procedures, treatments, and anxiety due to suspicion of child abuse

A recalcitrant case of Jacquet erosive diaper dermatitis after surgery for Hirschsprung disease in a boy with Waardenburg-Shah syndrome

We herein present a 4 year-old boy with Waardenburg-Shah syndrome who developed Jacquet erosive diaper dermatitis following a total colectomy and ileoanal anastomosis procedure for Hirschsprung disease. The diagnosis was made according to history and typical clinical findings. Complete resolution of the recalcitrant lesions after an ileostomy procedure supported the diagnosis. This case highlights the importance of being familiar with the predisposing factors and clinical presentation of this rare and severe form of chronic irritant dermatitis, since it may easily be misdiagnosed as other diseases in children and may lead to unnecessary diagnostic procedures, treatments, and anxiety due to suspicion of child abuse

The association between commuting, mood and job performance: the structural equation modelling approach

Commuting demands a considerable amount of time from a worker’s daytime. Numerous studies have shown the relationship between commuting and mood, and even job performance. Contradictory findings are also present in the literature regarding the association between commuting, mood and job performance. Therefore, the aim of the present study is to examine the association between commuting, negative upon arrival at work and individual job performance, given the special focus on the mediating role of negative mood. Two hundred and twenty-six participants were recruited via snowball sampling. Participants were asked to answer questions about commute duration and distance, to rate their mood upon arrival at work and to fill in the individual work performance questionnaire. Results showed that commute duration and distance was associated with job performance through mood upon arrival at work. It is believed that this study provides valuable information regarding the mediating role of mood upon arrival at work