Final answer:
The appropriate procedure to elicit Kernig's sign is to ask the patient to lie flat on their back with their hips and knees flexed. Then, attempt to passively extend the patient's leg at the knee.
Step-by-step explanation:
The appropriate procedure to elicit Kernig's sign is to ask the patient to lie flat on their back with their hips and knees flexed. Then, you should attempt to passively extend the patient's leg at the knee. If the patient experiences resistance and pain in the back of the thigh and refuses further extension, this is considered a positive Kernig's sign.