Stretch Injuries of Skeletal Muscles: Experimental Study in Rats' Soleus Muscle

• Autor(a) principal: Stellutti Pachioni, Celia Aparecida [UNESP]
• Data de Publicação: 2009
• Outros Autores: Mazzer, Nilton, Barbieri, Claudio Henrique, Camargo, Marcela Regina de [UNESP], Prado Teles Fregonesi, Cristina Elena [UNESP], Carmo, Edna Maria do [UNESP], Lourenco Nozabielli, Andrea Jeanne [UNESP], Martinelli, Alessandra Rezende [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.4067/S0717-95022009000400029; http://hdl.handle.net/11449/7014
• topic: Disease models; Animal; Rats; Skeletal muscle; Tetany

The study aimed to verify the physiological injury behavior by stretching the soleus muscle of rats, using a noninvasive experimental model. Twenty-four rats were used and divided into three groups of eight animals: control group (A), group that performed tetanus followed by electrical stimulation and a sudden dorsiflexion of the left paw performed by a device equipped with a mechanism of muscle soleus rapid stretching (B); and a group that only received the tetanus (C). Three days later, the animals were killed, and the soleus muscle was resected and divided into three segments. Morphological changes indicative of muscle damage appeared in all three segments of group B. In a lesser degree, similar changes were also detected in muscles subjected to only tetanus. This model was effective; reproducing an injury similar to what occurs in human sports injuries.