Final answer:
The Thompson test, also known as Simmonds' test, is used to diagnose a ruptured Achilles tendon, where the absence of foot plantarflexion upon calf muscle squeeze indicates a rupture. Various educational resources are available to explain the procedure, including simulations and detailed explanations.
Step-by-step explanation:
The Thompson test, also known as Simmonds' test, is a clinical examination procedure used to assess the integrity of the Achilles tendon in the ankle. It tests for a possible rupture of the Achilles tendon. To perform the test, a patient lies face down with their feet hanging off the edge of an examining table. The examiner then squeezes the calf muscle. If the foot does not move (plantarflex), this is indicative of a ruptured Achilles tendon. For students or individuals looking to understand this concept better, there are resources available, such as an applet from Davidson College demonstrating the process, or a simulation from Physics Flash, and a detailed explanation from the Kings Center for Visual Exploration in Alberta (KCVE).