Related topics: nerve cells · brain · neurons · cells · central nervous system

Space station cell study seeks causes of major diseases

High above the Earth, researchers are conducting a first-of-its-kind study to help patients with Parkinson's disease and multiple sclerosis on the planet below. The International Space Station experiment is looking for what ...

Electrifying insights into how bodies form

At first glance, Mike Levin's lab looks like any standard biology lab with its shelves of petri dishes containing small, brown, semitransparent flatworms called planaria, one of the organisms his lab studies. Look more closely ...

Insects feel chronic pain after injury

Associate Professor Greg Neely and his team of pain researchers in the Charles Perkins Centre have found compelling evidence that insects feel persistent pain after injury.

First complete wiring diagram of an animal's nervous system

In a study published online today in Nature, researchers at Albert Einstein College of Medicine describe the first complete wiring diagram of the nervous system of an animal, the roundworm Caenorhabditis elegans, used by ...

Perfect timing: Making the 'switch' from juvenile to adult

Very little is known about how the onset of puberty is controlled in humans, but the discovery of a new gene in the roundworm C. elegans could be the "missing link" that determines when it's time to make this juvenile-to-adult ...

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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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