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Torque

A force may be thought of as a push or pull in a specific direction. When a force is applied to an object, the object accelerates in the direction of the force according to Newton's laws of motion. The object may also experience a rotation depending on how the object is confined and where the force is applied. A hanging door is an excellent example ...

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Torque
Astronomy

What Is Microgravity?

Gravity is a force that governs motion throughout the universe. It holds us to the ground and keeps the Earth in orbit around the Sun. Microgravity describes the environment in orbital space flight, ... Continue reading

Microgravity
Medicine

Hypotension

Bend to select a book from the lowest shelf, then rise quickly. Chances are, you'll feel a little lightheaded for a few seconds. The reason is a drop of blood pressure caused by the change in ... Continue reading

Hypotension
Biology

When Did A Cat Become A Kitty?

It has long been thought that cats were first domesticated in Egypt, about 4000 years ago. Indeed, they were very highly thought of in ancient Egyptian society. It was illegal to kill or harm them, ... Continue reading

WhenDidACatBecomeAKitty
Physics

The Fourth State of Matter

There are three classic states of matter: solid, liquid, and gas; however, plasma is considered by some scientists to be the fourth state of matter. The plasma state is not related to blood plasma, ... Continue reading

ForthState

The Neurological Complications Of Lyme Disease

LymeDiseaseLyme disease is caused by a bacterial organism that is transmitted to humans via the bite of an infected tick. Most people bitten by an infected tick develop a characteristic skin rash around the area of the bite. The rash may feel hot to the touch, and vary in size, shape, and color, but it will often have a “bull’s eye” appearance (a red ring with a clear center). However, there are those who will not develop the rash, which makes Lyme disease hard to diagnose because its symptoms and signs mimic those of many other diseases. Seven to 10 days following an infected tick’s bite, the first stage of Lyme disease begins with flu-like symptoms such as fever, chills, swollen lymph nodes, headaches, fatigue, muscle aches, and joint pain.

Neurological complications most often occur in the second stage of Lyme disease, with numbness, pain, weakness, Bell’s palsy (paralysis of the facial muscles), visual disturbances, and meningitis symptoms such as fever, stiff neck, and severe headache. Other problems, which may not appear until weeks, months, or years after a tick bite, include decreased concentration, irritability, memory and sleep disorders, and nerve damage in the arms and legs. Lyme disease is treated with antibiotics under the supervision of a physician.

Most individuals with Lyme disease respond well to antibiotics and have full recovery. In a few patients symptoms of persisting infection may continue or recur, requiring additional antibiotic treatment. Varying degrees of permanent joint or nervous system damage may develop in patients with late chronic Lyme disease. In rare cases, some individuals may die from Lyme disease and its complications.