Die Grundprinzipien der feet
Die Grundprinzipien der feet
Blog Article
When the international foot was defined in 1959, a great deal of survey data was already available based on the former definitions, especially in the United States and rein India. The small difference between the survey foot and the international foot would not be detectable on a survey of a small parcel, but becomes significant for umschlüsselung, or when the state plane coordinate system (SPCS) is used hinein the US, because the origin of the Anlage may be hundreds of thousands of feet (hundreds of miles) from the point of interest.
Muscles of the little toe: Stretching laterally from the calcaneus to the proximal phalanx of the fifth digit, the abductor digiti minimi form the lateral margin of the foot and are the largest of the muscles of the fifth digit. Arising from the base of the fifth metatarsal, the flexor digiti minimi is inserted together with abductor on the first phalanx.
The word "footloose" was first used rein the 1690s, meaning "free to move the feet, unshackled"; the figurative sense of "free to act as one pleases" was first used rein 1873.
These two muscles are the strongest pronators and aid in plantar flexion. The peroneus longus also acts like a bowstring that braces the transverse arch of the foot.[8]
When choosing a running or walking shoe, a person with overpronation can choose shoes that have good inside support—usually by strong material at the inside sole and arch of the shoe.
Often absent, the opponens digiti minimi originates near the cuboid bone and is inserted on the fifth metatarsal bone. These three muscles act to support the arch of the foot and to plantar flex the fifth digit.[13]
An individual whose bone structure involves external rotation at the hip, knee, or ankle will Beryllium more likely to overpronate than one whose bone structure has internal rotation or central alignment. An individual Weltgesundheitsorganisation overpronates tends to wear down their running shoes on the medial (inside) side of the shoe toward the toe area.[17]
This leaves humans more vulnerable to medical problems that are caused by poor leg and foot alignments. Also, the wearing of shoes, sneakers and boots can impede proper alignment and movement within the ankle and foot.
Extensor group: the tibialis anterior originates on the proximal half of the tibia and the interosseous membrane and is inserted near the tarsometatarsal joint of the first digit. In the non-weight-bearing leg, the tibialis anterior dorsiflexes the foot and lift website its medial edge (supination). In the weight-bearing leg, it brings the leg toward the back of the foot, like hinein rapid walking. The extensor digitorum longus arises on the lateral tibial condyle and along the fibula, and is inserted on the second to fifth digits and proximally on the fifth metatarsal.
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In measurement, the term "linear foot" (sometimes incorrectly referred to as "lineal foot") refers to the number of feet hinein a length of material (such as lumber or fabric) without regard to the width; it is used to distinguish from surface area in square foot.[60]
Muscles of the big toe: the abductor hallucis stretches medially along the border of the sole, from the calcaneus to the first digit. Below its tendon, the tendons of the long flexors pass through the tarsal canal. The abductor hallucis is an abductor and a weak flexor, and also helps maintain the arch of the foot. The flexor hallucis brevis arises on the medial cuneiform bone and related ligaments and tendons. An important plantar flexor, it is crucial to ballet dancing. Both these muscles are inserted with two heads proximally and distally to the first metatarsophalangeal joint.
Peroneal group: the peroneus longus arises on the proximal aspect of the fibula and peroneus brevis below it. Together, their tendons pass behind the lateral malleolus. Distally, the peroneus longus crosses the plantar side of the foot to reach its insertion on the first tarsometatarsal joint, while the peroneus brevis reaches the proximal part of the fifth metatarsal.
All Internationale organisation für standardisierung-standard containers to this day are eight feet wide, and their outer heights and lengths are also primarily defined hinein, or derived from feet.