What condition results when there is a rupture of the Achilles tendon?

The condition that results from a rupture of the Achilles tendon is characterized by a complete loss of plantarflexion. The Achilles tendon, which connects the calf muscles to the heel bone, plays a crucial role in enabling plantarflexion, the movement that allows you to point your toes and push off your foot when walking, running, or jumping.

When the Achilles tendon is ruptured, the ability to effectively engage in this movement is severely compromised, leading to an inability to plantarflex the ankle. This significantly affects mobility and may result in a noticeable inability to perform actions like jumping or running, making it a critical component of the diagnosis following an Achilles tendon rupture.

In contrast, the other options represent conditions or symptoms that are not directly associated with an Achilles tendon rupture. Increased ankle dorsiflexion would not be expected as a primary outcome of the rupture but rather a result of other pathologies or compensatory movements. Chronic heel pain typically arises from different conditions such as plantar fasciitis rather than a tendon rupture. Tendonitis refers to inflammation of the tendon and would be a separate entity from a complete rupture, which is a more acute injury.