Injury to the anterior cruciate ligament (ACL) in the knee is really more than just a torn ligament. Along with damage to the ligament comes weakness of the quadriceps muscle. The quadriceps is the large muscle that comes down over the front of the thigh from the hip to the knee. Scientists are trying to unlock the puzzle of this muscle weakness. The muscle isn't wasting away, a condition called atrophy . So what could be causing this weakness? Is there some way that the ligament signals the muscle to contract in a normal knee? What other changes occur after a ligament is torn or damaged that could affect the muscle? Researchers at the University of Tokyo in Japan set out to answer these questions. They found signals that form a complete loop from knee joint to ligament to muscle. This is called afferent feedback . Before the experiment, scientists thought that damage to the ACL alters this loop. Decreased signals to the muscle cause the weakness. To prove this, they used vibration to the ...
I'm 15, and for the last 3/4 days I have been having stabbing like pains on the right side of my head, mainly when I first wake up or stand up! I am a worrier and tend to think of extreme things and make myself worried even more, I am going to the doctors tomorrow but I am afraid they will just give me pain killers. Leigh.
We hope your doctor was able to explain the pains and help you. Before prescribing medications, doctors should diagnose what the pains are if at all possible. You don't mention how long these pains last. If they're only seconds long, they might be ice pick headaches. You can find more information in Ice Pick Headaches - The Basics .
If your doctor isn’t able to help you, it may well be time to consult a Migraine and headache specialist. It’s important to note that neurologists aren’t necessarily Migraine and headache specialists
I just started having sharp stabbing pains of the left side of my head just above the left ear. It feels like someone is stabbing with a sharp object and is very painful. It doesn't last too long. Sometimes I get them one after the other and sometimes it goes away and them comes back, but right after this happens I get tingling all over my left check and then going down to the jaw are.
I've have this now going on 3 days. Today the jabbing is going to my forehead mainly on the left side. I'm very worried. Thanks, Rose.
This isn't a question that anyone can safely answer via the Internet. It needs to be addressed by a physician who can review your medical history, discuss your symptoms, and examine you in person.
What you describe could be ice pick headaches, but we cannot say if it is or not. You can find some information in Ice Pick Headaches - The Basics .
You should knowAnswers to your question are meant to provide general health information but should not replace medical advice you receive from a doctor. No answers should be viewed as a diagnosis or recommended treatment for a condition. Content posted by community members does not necessarily reflect the views of Remedy Health Media, which also reserves the right to remove material deemed inappropriate.