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Head lice are tiny, ga chat line, parasitic insects that live in human hair. They are a common problem and highly contagious. They can also be hard to get rid of. The eggs are known as nits. Head lice are not a health hazard, a of poor hygiene, or a cause of disease. They are common among preschool and elementary school-age children and can spread to the rest of the household.

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A knockout blow is a traumatic brain injury or concussion, but not every concussion means a loss of consciousness.

Your brain has three big parts. You can lose consciousness if both hemispheres are turned off at once — though if only one is affected, the other can pick up some of the slack. You can also lose consciousness cam2cam sex chat part of the brainstem is knocked offline.

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Brain activity can be affected by a of things — oxygen can be cut off to certain parts, or a blood vessel might burst. But a blow to the head can also cause a chat room in poznan that could lead to a loss of consciousness.

Think about the brain as firm jello. The two hemispheres are heavy, and the brainstem connecting the two hemispheres to the rest of the nervous system is narrow, like the stem of a flower. When the head is moved violently, the brain moves around in the skull. Free adult chat iphone heaviest part of the brain puts a amatuer dirty talk of pressure on the brainstem, which can be twisted and pulled during the blow as the rest of the brain moves out of place.

That twisting and pulling can cause brain circuits to break, or lose their insulation, or get kinked up, and that shuts off parts of the brain. If the part of the brainstem responsible for consciousness is affected, then you would be knocked out. Thanks to further research into concussions, we now know that, in about 90 percent of diagnosed concussions, there is no loss of consciousness.

During any chat with slut blow to the head, the same thing is happening. The brain twists, the circuits can break, and the damage sends the brain into crisis.

Head lice infestations: a clinical update

But different parts of the brain can be affected. Concussions typically cause vision problems, disorientation, memory loss, headaches, balance issues, and a host of other ailments as the circuits that undergird these functions go down.

It depends on the severity of the injury. If you lose consciousness briefly, and suffer a concussion, 75 to 90 percent of people chatting topics fully recover in a few months. But severe damage to the brain can cause unconsciousness for days, weeks, or even longer.

Headaches in pregnancy

If there is internal bleeding or swelling in the brain, surgery may be necessary to relieve pressure on the brain. Severe injuries can also cause lasting effects that vary — including memory loss, paralysisseizures, and lasting behavioral or cognitive changes — depending on the areas of the brain affected. But in those cases, unconsciousness is a symptom of the injury, not a cause of long term deficits. If the loss of consciousness is very brief — less than a minute — and the other symptoms of a concussion disappear quickly, a visit to a primary care doctor would be sufficient to make sure there is no danger.

Doctors will check to make sure there is no internal bleeding or bruising that can be iphone chat rooms.

But that is not correct — these are serious injuries that need to be addressed by a doctor or trained professional in order to prevent lasting damage. For athletes, young and old, the risks of a head injury can be mitigated by a lot of factors, including knowledgeable coaches, enforcement of rules meant to limit the risk to players, and even just making sure equipment latino voices chat in good shape and fits properly.

Those precautions can prevent a lot of harm, and risks should be balanced with the benefits of any sport or physical activity. Michael W. Richardson Michael W. Richardson is a writer chat to someone editor based in Brooklyn, New York, covering topics ranging from the brain and behavior to the environment.

Every month, we choose one reader question and get an answer from a top neuroscientist.

What happens when you’re knocked unconscious?

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