tailieunhanh - Báo cáo y học: "Preliminary observations of muscle fibre cross sectional area of flexor digitorum brevis in cadaver feet with and without claw toes"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Preliminary observations of muscle fibre cross sectional area of flexor digitorum brevis in cadaver feet with and without claw toes. | Locke et al. Journal of Foot and Ankle Research 2010 3 32 http content 3 1 32 JOURNAL OF FOOT AND ANKLE RESEARCH RESEARCH Open Access Preliminary observations of muscle fibre cross sectional area of flexor digitorum brevis in cadaver feet with and without claw toes Jackie Locke Stuart A Baird Jamie Frankis Abstract Background In order to facilitate normal gait toes require to be in a rectus position during the propulsive phase. This requires a correct balance and sequence of activity of the intrinsic musculature of the feet. Alteration of this balance and sequence may lead to the development ofclaw toes. Atrophy of the lumbricals occurs in the development of claw toes but it is not known if changes occur in any other intrinsic muscles including flexor digitorum brevis. This study set out to investigate whether hypertrophic changes were evident in flexor digitorum brevis in feet with claw toes. Methods Four cadaver feet were investigated two with rectus toes and two with claw toes. Flexor digitorum brevis was removed from each and seven anatomically significant tissue sections from each muscle were routinely processed cut and stained. One hundred and sixty muscle fibre cross sectional areas were measured from each section. Results The mean age of the donors was years and three of the four were female. Results showed that the cross sectional area of fibres from feet with claw toes was 417 pg2 significantly greater p than the cross sectional area of fibres from feet with rectus toes which was 263 pg2. Conclusions Although this study has several limitations preliminary observations reveal that flexor digitorum brevis muscle fibre cross sectional area is significantly reduced in feet with claw toes. This would indicate a relationship between muscle fibre atrophy of flexor digitorum brevis and clawing of the lesser toes. Background Toes have the primary function of increasing the total weight bearing area of the forefoot during the stance