The knee jerk reflex is part of this system. Let's say you're standing, and start to lean back too much. Leaning back stretches your quadriceps and triggers the reflex.

How Reflexes Work. A reflex is an automatic physical reaction to stimuli, such as a noise, physical sensation, taste, sight, or smell. The most familiar reflex is straightening your knee when a ...

There are lots of things kids don’t like about doctor’s visits, with shots, blood tests and throat swabs topping the list. But one thing they love is having their knee reflexes checked. A ...

How did the bodies of animals, including ours, become such fine-tuned movement machines? How vertebrates coordinate the ...

The left-knee reflex was absent, and both ankle reflexes were depressed. The erythrocyte sedimentation rate was 31 mm per hour, the cerebrospinal-fluid protein was 87 mg per 100 ml, ...

When I see a patient in clinic, I frequently tap my reflex hammer just below their knees to assess their patellar reflexes. Automatically, and without conscious awareness, their tendon contracts and ...

We all have reflexes. They are a type of involuntary movement or action that occurs in response to a stimulus. When you go to the doctor and they hit your knee with a light hammer, your leg ...