News tagged with nerve fibers
(Medical Xpress) -- Researchers from Japan recently published a paper in PLoS One describing their successful growth and transplantation of new teeth created from the stem cells of mice.
Medical research Jul 13, 2011 | 4.9 / 5 (23) | 8 |
Ever gone to the movies and forgotten where you parked the car? New UCLA research may one day help you improve your memory.
Neuroscience Feb 08, 2012 | 4.8 / 5 (13) | 1 |
(Medical Xpress)—Some parts of the body, like the liver, can regenerate themselves after damage. But others, such as our nervous system, are considered either irreparable or slow to recover, leaving thousands ...
Neuroscience May 13, 2013 | 5 / 5 (8) | 1 |
The brain receives information from the ear in a surprisingly orderly fashion, according to a University at Buffalo study scheduled to appear June 6 in the Journal of Neuroscience.
Neuroscience Jun 05, 2012 | 4.8 / 5 (8) | 1 |
(Medical Xpress) -- Distinct neural pathways are important for different aspects of language processing, researchers have discovered, studying patients with language impairments caused by neurodegenerative ...
Neuroscience Nov 24, 2011 | 4.7 / 5 (7) | 5 |
New information has come to light explaining how injured skin cells and touch-sensing nerve fibers coordinate their regeneration during wound healing. UCLA researchers Sandra Rieger and Alvaro Sagasti found that a chemical ...
Medical research May 24, 2011 | 4.3 / 5 (7) | 1 |
The moment you step into oppressive heat, the body senses life-threatening danger and starts fighting to keep things cool.
Health Jul 22, 2011 | 4.3 / 5 (7) | 0
Research shows mice brains are 'very wired up' at birth, suggests experience selects which connections to keep
Ask the average person the street how the brain develops, and they'll likely tell you that the brain's wiring is built as newborns first begin to experience the world. With more experience, those connections are strengthened, ...
Neuroscience Jun 06, 2012 | 5 / 5 (6) | 2 |
The soldier on the fringes of an explosion. The survivor of a car wreck. The football player who took yet another skull-rattling hit. Too often, only time can tell when a traumatic brain injury will leave ...
Neuroscience Mar 02, 2012 | 5 / 5 (5) | 3
Reduced production of myelin, a type of protective nerve fiber that is lost in diseases like multiple sclerosis, may also play a role in the development of mental illness, according to researchers at the Graduate School of ...
Neuroscience Nov 28, 2012 | 4.2 / 5 (5) | 1 |
Study shows omega-3 fatty acid, curry spice repair tissue damage, preserve walking in rats with spinal-cord injury
UCLA researchers discovered that a diet enriched with a popular omega-3 fatty acid and an ingredient of curry spice preserved walking ability in rats with spinal-cord injury. Published June 26 in the Journal of Neurosurgery: Sp ...
Neuroscience Jun 26, 2012 | 5 / 5 (4) | 1 |
Scientists have identified an influential link in a chain of events that leads to autoimmune inflammation of the central nervous system in a mouse model of multiple sclerosis (MS).
Medical research May 02, 2013 | 5 / 5 (4) | 0 |
A new study led by the University of North Carolina at Chapel Hill found significant differences in brain development starting at age 6 months in high-risk infants who later develop autism, compared to high-risk ...
Autism spectrum disorders Feb 17, 2012 | 4.8 / 5 (4) | 0 |
(Medical Xpress)—Gastric banding, a common surgery to reduce obesity, leaves much to be desired. Typically, the patient is left with a feeling of constant hunger. Stimulators implanted in the feeding centers ...
Overweight and Obesity Apr 09, 2013 | 4.8 / 5 (4) | 1 |
Medical imaging systems allow neurologists to summon 3-D color renditions of the brain at a moment's notice, yielding valuable insights. But sometimes there can be too much detail; important elements can go ...
Neuroscience Jun 01, 2011 | 4 / 5 (4) | 1 |
An axon or nerve fiber is a long, slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neuron's cell body or soma.
An axon is one of two types of protoplasmic protrusions that extrude from the cell body of a neuron, the other type being dendrites. Axons are distinguished from dendrites by several features, including shape (dendrites often taper while axons usually maintain a constant radius), length (dendrites are restricted to a small region around the cell body while axons can be much longer), and function (dendrites usually receive signals while axons usually transmit them). All of these rules have exceptions, however.
Some types of neurons have no axon—these are called amacrine cells, and transmit signals from their dendrites. No neuron ever has more than one axon; however in invertebrates such as insects the axon sometimes consists of several regions that function more or less independently of each other. Most axons branch, in some cases very profusely.
Axons make contact with other cells—usually other neurons but sometimes muscle or gland cells—at junctions called synapses. At a synapse, the membrane of the axon closely adjoins the membrane of the target cell, and special molecular structures serve to transmit electrical or electrochemical signals across the gap. Some synaptic junctions appear partway along an axon as it extends—these are called en passant ("in passing") synapses. Other synapses appear as terminals at the ends of axonal branches. A single axon, with all its branches taken together, can innervate multiple parts of the brain and generate thousands of synaptic terminals.
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