Capacidade funcional em cavalos de salto suplementados com linhaça / Functional capacity of jumping horses supplemented with linseed

Objetivou-se avaliar a suplementação com linhaça, como fonte do ácido graxo ômega-3, sobre a capacidade funcional de cavalos de salto. Foram utilizados seis equinos distribuídos em dois quadrados latinos 3x3 balanceados. Os grupos experimentais consistiram em níveis crescentes de linhaça (na forma de farinha e óleo de linhaça na proporção de 75:25, respectivamente), resultando nos tratamentos de 0 (controle), 60 e 120g/cavalo/dia de linhaça. Os cavalos foram suplementados por período de 30 dias. A atividade física consistiu em trabalho para salto no nível de equitação fundamental. As variáveis funcionais mensuradas foram índice de claudicação (IC), comprimento da passada e biometria da articulação metacarpofalangeana - MCF (circunferência e ângulo de flexão). Observou-se efeito significativo da suplementação com linhaça, independentemente da dosagem, sobre o IC. Ainda, o fornecimento de 120g de linhaça/cavalo/dia aumentou o comprimento da passada dos cavalos ao trote (P<0,05) e promoveu redução de 0,5cm na circunferência da articulação MCF (P<0,05) em comparação ao grupo controle. A suplementação de cavalos de salto com 120g/dia de linhaça promoveu maior comprimento da passada ao trote e redução de edema na articulação metacarpofalangeana, melhorando suas capacidades funcionais...

The objective of this study was to evaluate the supplementation of linseed as an omega-3 fatty acid supplier on the functional capacity of jumping horses. 6 horses disposed in two 3 x 3 balanced Latin squares were used. The treatments consisted of increasing levels of linseed mixed with flour and linseed oil in a ratio of 75:25, respectively, resulting in 0g (control), 60g and 120g on a daily basis per horse. The horses were supplemented for 30 days. Physical activity was jumping at riding class level. The functional parameters measured were lameness index, stride length and joint metacarpophalangeal (MCP) biometry (circumference and flexion angle). A significant linseed supplementation effect for doses of 60 and 120g was observed on the lameness index. Feeding 120g of linseed increased stride length while trotting (P<0.05). An increment of 0.5cm on MCP circumference was found in horses that received the control diet when compared to those horses that consumed 120g of linseed. Thus, supplementation of jumping horses with 120g/day of linseed promoted greater stride length at a trot and reduced swelling in the metacarpophalangeal joint, improving their functional capabilities...

Electromyographic activities during isometric contraction of interphalangeal joint extensors of the finger.

OBJECTIVE: To investigate which hand muscles were used for interphalangeal joint (IP) extension when holding the metacarpophalangeal joint (MCP) in 90 degrees flexion, 0 degrees, and full hyperextension. MATERIAL AND METHOD: Fifteen volunteers extended IP when MCP was manually maintained in 90 degrees flexion, 0 degrees, and full hyperextension for 5 seconds with and without maximal manual resistance twice each. Maximal resistance was ensured and maintained manually by the actions of both researcher and subject. By using needle electromyography, the root mean square (RMS) * values representing the muscle function of the extensor digitorum communis (EDC), lumbrical, and interosseous muscles of the middle fingers of the dominant hands were recorded and averaged from the two tests conducted on each subject. RESULTS: In 87% of the subjects, EDC had the highest RMS value in 90 degrees MCP flexion without resistance, and in 100% of them, it had the highest value in both 90 degrees MCP flexion and 0 degrees with resistance. There were no clear differences between the three muscles when extended in all other positions. When the same muscles were compared, it was found that EDC had the highest value in 90 degrees MCP flexion, especially without resistance. Its RMS values were significantly increased when the resistance was applied in all positions. It was also found that the lumbrical and interosseous muscles had the highest RMS values in full hyperextension. CONCLUSION: EDC had the highest muscle activity for IP extension in 90 degress MCP flexion, especially when the resistance was applied. However, the activities among the three muscles could not be clearly differentiated when extended in other positions.

Nuevo método de diagnóstico en las inestabilidades metacarpofalángica del pulgar / New diagnositic at metacarpo phalangeal unstability of thumb

Tomando una simple radiografía antero-posterior con estrés de la articulación metacarpofalángica y observando el desplazamiento de los sesamoideos, se puede interpretar el mecanismo lesivo y diagnosticar con exactitud la localización anatómica de la lesión ligamentaria. Se realizó una investigación y documentación sistematizada, en preparados anatómicos frescos, del rol que cumple cada uno de los elementos anatómicos y de los mecanismos que producen las lesiones ligamentarias. Esto se correlacionó con estudios clínicos-radiológicos realizados en pacientes con patología ligamentaria de esta articulación, constatándose un patrón de desplazamiento de los sesamoideos. Cuando se produce un trauma con la articulación en extensión, se rompen los ligamentos metacarpo-falángico y metacarpo-sesamoideo, perdiéndose el paralelismo entre los sesamoideos y la cabeza del metacarpiano. Cuando el trauma es una articulación en flexión, se rompe el ligamento metacarpo-falángico y se pierde el paralelismo entre los sesamoideos y la base de la falange