Muscles of the Foot
Muscles That Move the Foot and Toesand
The muscles acting on the foot can be divided into two distinct groups; extrinsic and intrinsic muscles. In this article we shall be considering the anatomy of the intrinsic muscles of the foot. They can be divided into those situated on the dorsum of the foot, and those in the sole of the foot. Whilst many of the extrinsic muscles attach to the dorsum of the foot, there are only two intrinsic muscles located in this compartment — the extensor digitorum brevis, and the extensor hallucis brevis. They are mainly responsible for assisting some of the extrinsic muscles in their actions.
Overview of Function: Muscles of the Toes, Fibularis Group , Triceps Surae Group , Tom, Dick, and Harry Group , Dorsal Surface ,
The intrinsic muscles of the foot originate on the heel bone and work to stabilise the arches of the foot while regulating the rate of pronation and giving motion control to the foot. Two groups of these muscles exist - the plantar group located on the sole of the foot, which stabilises the arch and controls movement of individual digits, and the dorsal group located on the dorsum of the foot which assists some of the extrinsic muscles in their actions. Recent studies have shown that under external load, the activation of the three largest plantar intrinsic muscles - Abductor Hallucis, Flexor Digitorum and Quadratus Plantae - produces significant alterations in the metatarsal and calcaneus segment angles, helping to counter the deformation of the longitudinal arch LA by reducing the length and increasing the height of the LA. These studies prove vital in understanding the role played by these muscles in controlling foot posture, especially during weightbearing activities. In the event of peripheral neuropathy , denervation of these muscles leads to a range of deformities such as hammer toes caused by the flexion of the interphalangeal joints and extension of the metatarsal-phalangeal joints and the appearance of prominent plantar metatarsal heads.
The foot plural feet is an anatomical structure found in many vertebrates. It is the terminal portion of a limb which bears weight and allows locomotion.
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The foot is an incredibly complex mechanism. Each foot contains 26 bones, 33 joints, and more than a hundred muscles, tendons, and ligaments. These parts work harmoniously to get you from one place to the next. They do it all while handling hundreds of tons of force — your weight in motion — every single day. They are truly amazing structures, however, the stress of carrying you around creates a lot of wear in tear which, in turn, puts your feet at a higher risk of injury than any other part of your body.
11. Muscles of the Leg and Foot