The Ankle Joint, otherwise known as the Talocrural Articulation, is a synovial hinge joint that connects the distal tibiofibular joint to the upper surface of the body of the talus. Owing its strength to the shape of the articulating bones as well as the ligaments and tendons attached to it, the ankle joint is relatively stable in the neutral position.
Dorsiflexion and Plantarflexion are the motions that take place at the talocrural joint. The following muscles contribute to the dorsiflexion of the talocrural joint: 1) Tibialis Anterior, 2) Extensor Hallucis Longus, 3) Extensor Digitorum Longus, and 4) Peroneus Tertius. Dorsiflexion is mainly limited by the tension of the Achilles Tendon, the posterior fibers of the medial ligament as well as the calcaneofibular ligament. (Snell, 2012) Plantarflexion, on the other hand, involves the action of the following muscles: 1) Gastrocnemius, 2) Soleus, 3) Plantaris, 4) Tibialis Posterior, 5) Flexor Digitorum Longus, 6) Flexor Hallucis Longus, 7) Peroneus Brevis, and 8) Peroneus Longus. This movement is limited by the tension of the muscles in the anterior compartment of the leg, the anterior fibers of
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The status of both leg flexor and extensor muscle activation during different drop heights has not been systematically examined, although biceps femoris alone has been assessed during drop jump (Kellis, et. al, 2003; Peng, et.al, 2010). A study by Ebben, et. al (2008), showed a significant main effect of the gastrocnemius especially in a vertical jump greater than 50cm, but there is no current established standard height used for drop landing, whether for testing or for training. The height of the drop is mainly increased or varied to train greater stimulus in athletes (Nordin & Dufek,
Huang C, Hsieh T, Lu S, Su F. (2011). Effect of Kinesio tape to muscle activity and vertical jump performance in healthy inactive people. Biomed Eng Online 10; 70. Kase K, Wallis J, Kase T. (2003) Clinical Therapeutic Applications of the Kinesio Taping Methods.
Therapeutic stretches of the gastrocnemius and soleus muscles. If the ligament are weakened, cross fiber friction them to try to regain some of the integrity of the ankle back.
This experiment was completed in order to compare calf circumference as well as weight to jump height. If a person has larger calves then they will likely be capable of reaching a higher vertical height. It can also be shown that since males tend to have larger calves, they can jump higher. A larger calf circumference is more likely to reflect a high vertical jump due to the fact that the fat content of the calves in the experiment was accounted for, therefore a large calf measurement in this experiment means a muscular calf. It is common knowledge that more muscle will result in stronger legs leading to a higher vertical.
Plantar fasciitis is caused from muscles and ligaments that alter the calcaneous (the big bone on hill of foot) (Daniels and Morrell 2012). The alteration of these muscles and ligaments will inflict pain and discomfort on the patient, and if not treated will cause failure of ligaments, bones, and muscles. The patient was tested with a simple squat technique that showed his heels were coming off the ground (Daniels and M...
The surfaces of the joint are organised to allow only back and forth motion such as bending and straightening. This type of joint can be found between your upper arm and your lower arm, in the elbow. This type of joint is incredibly important as it allows an up and down movement, without this type of joint, we wouldn’t be able to move our arm up and down. Muscles are attached to this type of joint by tendons to allow it to contract and relax and be able to move the bone within this joint. Ligaments attach the bones in a hinge joint together, for example, the humerus and the tibia are joined by ligaments but they also have antagonist muscle pairs attached to them by tendons which allow the bone to move by contraction and relaxation of the muscles. This type of joint mainly includes long bones as it’s necessary for movement in the skeletal
The focus of this paper is mechanically and automatically break down the deadlift. It focuses on the four phases of the deadlift (The lift off, pull through, the lockout, and the lowering phase) as well as the muscles involved in lifting and lowering the load. The sole purpose of the deadlift is for health and fitness. It is a core lift that works nearly every muscle in the body. Muscles from the lower and upper extremities will go through a period of flexion and extension when moving through the phases. The deadlift should be performed safely, and with proper form to avoid injury. This paper shows and demonstrates the proper form of the deadlift. There are also a number of forces acting on the load and the athlete. Gravity and external forces will be an active part of lifting the load. Images and tables are provided in the paper to better understand the movements and muscles used when performing the deadlift.
This skill involves jumping in the sagittal plane about the transverse axis. It consists of hip, knee, ankle, and shoulder joints. In the preparation phase in propulsion, the subject has flexed knees and hips which will need to be straightened by the strength of their corresponding joints such as the hinge joint at the knee joint. The hip joint is a ball and socket joint that bears the body weight and allows for jumping motion. During th...
...rown C. Does Wearing a Prophylactic Ankle Brace During Drop Landings Affect Lower Extremity Kinematics and Ground Reaction Forces?. Journal Of Applied Biomechanics [serial online]. April 2013;29(2):205-213. Available from: SPORTDiscus with Full Text, Ipswich, MA. Accessed January 26, 2014.
When performing manual muscle testing for shoulder flexion and abduction, PTA’s typically place their hand at the wrist verses the mid-extremity because placing their hands at the wrist increases the length of the lever thus testing the muscles ability to resist externally applied force overtime and across the bone-joint lever arm system. Shorter lever arms will provide higher testing scores when compared to using longer lever arms, thus changing the point of force application affects the length of the lever arm and therefore the muscle torque.
The fibula is a leg bone located on the lateral side of the tibia, with which it is connected above and below. It is the smaller of the two bones, and the slenderest of all the long bones, and plays a significant role in stabilizing the ankle and supporting the muscles of the lower leg. The fibula is the smaller, non-weight bearing, of the two bones in the lower leg, while the tibia is the larger, weight bearing bone. The fibula and tibia moves very little relative to each other and the joints that it forms contribute significantly to the function of the lower leg. The joint it forms permit the fibula to adjust its position relative to the tibia, increasing the range of motion of the ankle. Fibular fractures are not often a severe injury, because the bone is supports only about 17% of the body weight.
The human foot is an incredibly complex part of the body, it is made up of twenty-six bones which is fully twenty-five percent of the bones in the entire body. The structure of the forefoot includes the five metatarsal bones and the phalanges. The metatarsal bones are for forward movement and provides attachment for several tendons. The phalanges, also known as the toes, movement take place in the joints. The foot movement only has two movements; inversion and eversion. All the joints in the hindfoot and midfoot contributes to these complex movements. The foot has two significant functions: weight bearing and impulsion, which both requires a high degree of stability. The foot must also be flexible so it is able to adapt to uneven surfaces. The various bones and joints of the foot are what allows the foot to be flexible. In order for the foot to be able to support any weight the various of bones must form an arch. The foot has three arches that are maintain by the shape of the bones and by the ligaments. The arches are supported by the muscles and tendons. A foot is a strong, flexible, and durable it allows us to daily activities as we please while carrying all the
An ankle fracture is a break in one or more of the three bones that make up the ankle joint. The ankle joint is made up by the lower (distal) sections of your lower leg bones (tibia and fibula) along with a bone in your foot (talus). Depending on how bad the break is and if more than one ankle joint bone is broken, a cast or splint is used to protect and keep your injured bone from moving while it heals. Sometimes, surgery is required to help the fracture heal properly.
Other inclusions into an athlete’s training regime may include the use of Olympic lifts. These techniques have been shown to increase the power and strength of muscles, at a greater extent than power lifting or res...
The purpose of the squat is to train the muscles around the knees and hip joints, as well as to develop strength in the lower back, for execution of basic skills required in many sporting events and activities of daily living. Because a strong and stable knee is extremely important to an athlete or patient’s success, an understanding of knee biomechanics while performing the squat is helpful to therapists, trainers, and athletes alike (11). Because most activities of daily living require the coordinated contraction of several muscle groups at once, and squatting (a multi-joint movement) is one of the few strength training exercises that is able to effectively recruit multiple muscle groups in a single movement, squats are considered one of the most functional and efficient weight-bearing exercises whether an individual’s goals are sport specific or are for an increased quality of life