Tibialis Anterior
The supinator muscle is a muscle in the forearm that is not directly responsible for flexion or extension of the arm. Its primary function is to rotate the forearm in a movement called supination, where the palm faces up.
When standing on your tiptoes, the tibialis anterior muscle serves as the prime mover responsible for dorsiflexion of the foot. It helps lift the front part of the foot upward and allows you to push off the ground efficiently.
The muscle responsible for dorsiflexion and eversion of the foot is the tibialis anterior. This muscle is located in the front of the lower leg and plays a key role in lifting the foot upward and turning the sole outward. Its contraction allows for better clearance of the foot during walking and helps maintain balance.
The prime mover in ankle dorsiflexion is the tibialis anterior muscle, which is located at the front of the shin. This muscle contracts to pull the foot upward, allowing for dorsiflexion of the ankle joint.
The tibialis anterior muscle inserts onto the base of the first metatarsal and the medial cuneiform bone. It is responsible for dorsiflexion of the foot and inversion of the ankle.
Anterior tibialis
Dorsiflexion is primarily caused by the contraction of the muscles located in the anterior compartment of the leg, particularly the tibialis anterior. This movement involves lifting the foot upwards towards the shin, which is essential for activities like walking and running. Neural signals from the brain and spinal cord initiate this muscle contraction, allowing for controlled movement of the ankle joint. Factors such as joint flexibility and muscle strength also play a role in the efficiency of dorsiflexion.
The anterior forearm muscle does not actually exist. Instead, there are a total of eight different muscles with the anterior compartment of the forearm. Their jobs are specifically related to flexion and pronation, or inward rotation of the hand.
Ankle dorsiflexion is when the ankle is moved back towards the body. The muscles involved in this movement is the ankle extensor.
The muscle primarily responsible for the last 10 degrees of knee extension is the popliteus muscle. It is a small muscle located at the back of the knee joint and helps to unlock the knee by internally rotating the tibia on the femur.
The opposite muscle to the tibialis anterior is the gastrocnemius muscle, which is located at the back of the lower leg. The tibialis anterior is responsible for dorsiflexion of the foot (bringing the toes toward the shin), while the gastrocnemius is responsible for plantarflexion of the foot (pointing the toes away from the shin).