Neuroscience

Could repeated squeezes to the arms, legs protect the brain?

What if wearing a blood pressure cuff could help prevent stroke? In a new study, people who restricted their blood flow by wearing inflated blood pressure cuffs on an arm and leg showed signs of more controlled blood flow ...

Diseases, Conditions, Syndromes

Could you have a sensitive gut?

(HealthDay)—If you've ever wondered why emotional distress causes stomach cramps or a mad dash to the bathroom, know that there's a direct line of communication that runs from your brain to your digestive tract.

Medical research

A road map to stem cell development

Johns Hopkins Medicine researchers report they have created a method of mapping how the central nervous system develops by tracking the genes expressed in cells. The technique, demonstrated in mouse retinas for this study, ...

Parkinson's & Movement disorders

Inflamed monkey guts produce Parkinson's-related proteins

The intestinal linings of monkeys with inflamed bowels show chemical alterations similar to abnormal protein deposits in the brains of Parkinson's patients, lending support to the idea that inflammation may play a key role ...

Neuroscience

Fooling nerve cells into acting normal

Nerve cells, or neurons—specifically the "workhorse cells" involved in walking, breathing and chewing—can adjust to changes in the body, but they never stop working unless there is an fatal injury. What exactly signals ...

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Nervous system

The nervous system is a network of specialized cells that communicate information about an organism's surroundings and itself. It processes this information and causes reactions in other parts of the body. It is composed of neurons and other specialized cells called glial cells,(plural form glia), that aid in the function of the neurons. The nervous system is divided broadly into two categories: the peripheral nervous system and the central nervous system. Neurons generate and conduct impulses between and within the two systems. The peripheral nervous system is composed of sensory neurons and the neurons that connect them to the nerve cord, spinal cord and brain, which make up the central nervous system. In response to stimuli, sensory neurons generate and propagate signals to the central nervous system which then processes and conducts signals back to the muscles and glands. The neurons of the nervous systems of animals are interconnected in complex arrangements and use electrochemical signals and neurotransmitters to transmit impulses from one neuron to the next. The interaction of the different neurons form neural circuits regulate an organism's perception of the world and what is going on with its body, thus regulating its behavior. Nervous systems are found in many multicellular animals but differ greatly in complexity between species.

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