Match the causes of fractures of the patella with their descriptions.InstructionsDrag and drop application.Direct traumaDirect trauma drop zone empty.Indirect traumaIndirect trauma drop zone empty.This most often produces fragmentation with little displacement.A severe pull of the patellar tendon occurs against the femur when the knee is semiflexed and the patella is subjected to maximum stress from the quadriceps tendon and the patellar ligament. Forcible muscle contraction may then fracture the patella at its lower half.

Match the types of fractures of the patella with their symptoms.InstructionsDrag and drop application.Direct fractureDirect fracture drop zone empty.Indirect fractureIndirect fracture drop zone empty.Involves little bone separationInvolves tearing of the joint capsule, separation of bone fragments, and possible tearing of the quadriceps tendon

Which of the following are true of acute patellar subluxation or dislocation?Multiple select question.The athlete experiences a complete loss of knee function along with pain and swelling.This injury is more likely to occur in a male athlete than in a female because of a narrower pelvis in a male.As a rule, displacement takes place laterally, with the patella resting on the lateral condyle.A first-time patellar dislocation is seldom associated with a fracture.

Arrange the actions that cause acute patellar subluxation or dislocation in the correct order of occurrence. (Place the first action at the top.)Position 1 of 3 An athlete plants the foot, decelerates, and simultaneously cuts in an opposite direction from the weight-bearing foot. correct toggle button unavailableAn athlete plants the foot, decelerates, and simultaneously cuts in an opposite direction from the weight-bearing foot.Position 2 of 3 The thigh rotates internally while the lower leg rotates externally, causing a medially directed valgus force at the knee. correct toggle button unavailableThe thigh rotates internally while the lower leg rotates externally, causing a medially directed valgus force at the knee.Position 3 of 3 The quadriceps muscle attempts to pull in a straight line and as a result pulls the patella laterally. correct toggle button unavailableThe quadriceps muscle attempts to pull in a straight line and as a result pulls the patella laterally.Correct AnswerQuestionAn athlete plants the foot, decelerates, and simultaneously cuts in an opposite direction from the weight-bearing foot.The thigh rotates internally while the lower leg rotates externally, causing a medially directed valgus force at the knee.The quadriceps muscle attempts to pull in a straight line and as a result pulls the patella laterally.

Which of the following is true of chondromalacia patella?Multiple choice question.It is often related to either abnormal movement of the patella within the femoral groove or to overuse.It is a condition common to the rapidly growing immature adolescent's knee.This condition often develops because of repeated trauma to the knee during sports activities.The most common cause of the condition is the repeated pull of the patellar tendon at the tibial tubercle on the front of the tibia.

A landscaper accidentally had their leg crushed by a tree. Their femur was impacted with such force that a section of the bone completely shattered into fragments. What type of break is this?Multiple ChoiceAn oblique fractureA greenstick fractureA fissured fractureA comminuted fracture