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The Effect of Acupuncture at St34 on the Patellar Reflex – a Prospective Randomized, Controlled Clinical Study

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The Effect of Acupuncture at St34 on the Patellar Reflex – a Prospective Randomized, Controlled Clinical Study M2015 The effect of acupuncture at St34 on the patellar reflex – a prospective randomized, controlled clinical study BRUNO FILIPE DA SILVA PACHECO DISSERTAÇÃO DE MESTRADO APRESENTADA AO INSTITUTO DE CIÊNCIAS BIOMÉDICAS ABEL SALAZAR DA UNIVERSIDADE DO PORTO EM MEDICINA TRADICIONAL CHINESA 1 BRUNO FILIPE DA SILVA PACHECO The effect of acupuncture at St34 on the patellar reflex – a prospective randomized, controlled clinical study Dissertação de Candidatura ao Grau de Mestre em Medicina Tradicional Chinesa submetida ao Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto. Orientador: Henry J. Greten Categoria: Professor Associado Afiliação: Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto Co-orientador: Jorge Pereira Machado Categoria: Professor Associado Afiliação – Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto Co-orientador: Maria João Rodrigues Ferreira Rocha dos Santos Categoria: Mestre Medicina Tradicional Chinesa Afiliação: Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto 2 DEDICATION To my son, who follows me on this adventure since the very beggining. 3 ACKNOWLEDGMENTS To my wife and son, for all the times that I was not present and for all the support, patience and joy for beeing part of my life. To my parents and brother for the future good ahead. To Prof. Dr. Henry Johannes Greten, for his support, supervision and inspiring lectures and teachings. To Prof. Jorge Machado for the help and ideas added to this work. To Maria João, for all the frindship, support and availability during this past two years. To all my colleagues who traveled with me. To Petra for being a constant help when needed. To Bruno Ramos for all the sympathy and help. To all the participants of this study, for making this study possible. 4 RESUMO Introdução: A debilidade do músculo quadríceps pode ser um dos principais fatores de patologias do joelho, como a síndrome da dor patelo-femoral. A condição, que geralmente tem início repentino, é caracterizada por uma dor difusa nas imediações da patela [39, 47, 53]. A incidência na população geral é relatada como sendo tão elevada como um em cada quatro indivíduos, com esta proporção aumentada na população atlética [39, 53]. O músculo quadríceps é o principal músculo extensor do reflexo patelar, desempenhando assim um papel importante na amplitude do movimento. Um aumento na força muscular traduz-se num aumento da amplitude e vice-versa. O objetivo deste estudo foi verificar se a acupuntura produz um efeito no reflexo patelar de individuos saudáveis, de forma a inferir um aumento da potência muscular do quadriceps. Metodologia: Foi realizado um estudo clínico, prospectivo, randomizado e controlado com 45 indivíduos saudáveis com idades entre os 18 e 69 anos, de ambos os sexos (32 mulheres e 13 homens). Os critérios de exclusão foram compostos por, prejuízo significativo motor, dor ciática, lombalgia, distúrbios dentro da prótese sacral-ilíaca ou ortopédicas (joelho ou pélvicas), gravidez, história de debilitante lesão nos últimos três meses, transtorno de artrite da coluna vertebral, e história de distúrbio no sistema nervoso periférico/central ou neuromuscular. Os indivíduos foram aleatoriamente distribuídos por ordem de chegada em três grupos: controle (n = 15), experimental (n = 15) e sham (n = 15). Analisamos a amplitude movimento e o tempo de reacção do reflexo patelar, antes e depois da intervenção no ponto de acupuntura Monticulus Septi (St34) do conduto estômago. Na análise dos dados, foram apenas considerados 41 registos, devido a dificuldades na análise dos mesmos. A distribuição final foi: controle (n=14), experimental (n=12) e Sham (n=15). 5 Resultados: No grupo experimental houve um aumento de 30,71% na amplitude do movimento do joelho após a intervenção, mostrando um resultado estatisticamente significativo (P = 0,023). No grupo de controlo (-2,87) e grupo sham (-2,30) não foram obtidas melhorias significativas (P = 0,768 e P = 0,838, respectivamente). Relativamente ao tempo de reação, o grupo experimental, grupo de controlo e grupo sham não mostraram alterações significativas. Conclusão: Este trabalho sugere que o ponto de acupuntura St34 tem um efeito específico na amplitude do movimento do reflexo patelar, permitindo especular que houve um aumento da força muscular do músculo quadríceps devido a um maior número de unidades motoras recrutadas. Palavras-chave: Anatomia do joelho, acupunctura, muscúlo quadriceps, patologias do joelho, reflexo patelar. 6 ABSTRACT Background: Weakness of the quadriceps muscle may be one of the main factors of knee pathologies such as the patella-femoral pain syndrome. The condition, which generally has sudden onset, is characterized by a diffuse ache in the vicinity of the patella [39, 47, 53]. The incidence in the general population is reported to be as high as one in four with this proportion increasing in the athletic population [39, 53]. The quadriceps muscle is the main extensor muscle in patellar reflex, thus playing a major role in the range of motion. An increase in muscle power translates into an increase of the amplitude and vice-versa. The objective of this study was to determine whether acupuncture produces an effect on the patellar reflex of healthy individuals in order to deduce an increase in muscle strength of the quadriceps. Metodology: We performed a prospective, randomized, controlled, clinical study with 45 healthy individuals aged between 18 to 69 years old, of both genders (32 women and 13 men). The exclusion criteria were significant motor impairment, sciatic pain, lumbago, disorders within the sacral-iliac or orthopedic prosthesis (knee or pelvic), pregnancy, history of debilitating injury within the previous three months, spinal arthritic disorder, and history of a central/peripheral nervous system or neuromuscular disorder. The individuals were distributed randomly in order of arrival in three groups: control (n=15), experimental (n=15) and sham (n=15). We analized the amplitude (range of motion) and reaction time of the patellar reflex, before and after the intervention in the acupunture point Monticulus Septi (St34) of the stomach conduit. In the data analysis, were only considered 41 records, due to difficulties in analyzing the data collected. The final distribution was: control (n = 14), experimental (n = 12) and Sham (n=15). 7 Results: In the experimental group there was an increase of 30,71% in the range of motion of the knee after intervention, showing a statistically significant result (p=0,023). In the control group (-2,87) and sham group (-2,30) no statistically significant improvements were obtained (p=0,768 and p=0,838 respectively). For time of reaction, none of the groups showed significant changes. Conclusion: This work suggests that the acupuncture point St34 has a specific effect on increasing the range of motion of the patellar reflex, thereby we may speculate that it improve the recruitment of motor units promoting that way the increase of the muscular power of the quadriceps muscle. Keywords: Knee anatomy, acupunture, quadriceps muscle, knee patologies, patellar reflex. 8 Index Introduction ..................................................................................................................... 11 Part I 1. Knee anatomy and biomecanics ................................................................................. 14 1.1. Menisci ................................................................................................................. 15 1.2 Patella ................................................................................................................... 16 1.3. Muscles involved in the knee bio-mecanic ............................................................ 18 1.4. Tendon reflexes .................................................................................................... 18 1.5. Neuronal circuit of the patellar reflex .................................................................... 19 1.6. Muscle Spindles and Golgi tendon organs ............................................................ 19 1.7. Patellar reflex ....................................................................................................... 20 1.8. Clinical aplication of patellar reflex ........................................................................ 21 2. Heidelberg Model of Tradicional Chinese Medicine ............................................ 21 2.1 Acupuncture .......................................................................................................... 22 2.2 Yin Yang................................................................................................................ 22 2.3 Phases .................................................................................................................. 23 2.4 Conduits ................................................................................................................ 26 2.5 Stomach conduit and acupuncture point Stomach 34 (St34) ................................. 26 2.6 Qi .......................................................................................................................... 27 2.7 Xue ........................................................................................................................ 27 2.8 Traditional Chinese unit of measurement (Cun)..................................................... 28 2.9 Leopard Spot Technique ......................................................................................
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