News tagged with dendrites

Related topics: nerve cells , neurons

The STING of radiation

A team of researchers led by Ludwig Chicago's Yang-Xin Fu and Ralph Weichselbaum has uncovered the primary signaling mechanisms and cellular interactions that drive immune responses against tumors treated with radiotherapy. ...

Nov 20, 2014
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From HIV to cancer, IL-37 regulates immune system

A University of Colorado Cancer Center study published in this month's Proceedings of the National Academy of Sciences describes the activity of a recently discovered communication molecule of the body's immune system, Interl ...

Nov 03, 2014
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Research reveals how lymph nodes expand during disease

Cancer Research UK and UCL scientists have discovered that the same specialised immune cells that patrol the body and spot infections also trigger the expansion of immune organs called lymph nodes, according to a study published ...

Oct 22, 2014
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Asthma vaccine discovery

With asthma now affecting up to one in four New Zealand children, the researchers say this is a promising step in the challenge to understand and control asthma.

Oct 06, 2014
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Dendrite

Dendrites (from Greek δένδρον déndron, “tree”) are the branched projections of a neuron that act to conduct the electrochemical stimulation received from other neural cells to the cell body, or soma, of the neuron from which the dendrites project. Electrical stimulation is transmitted onto dendrites by upstream neurons via synapses which are located at various points throughout the dendritic arbor. Dendrites play a critical role in integrating these synaptic inputs and in determining the extent to which action potentials are produced by the neuron. Recent research has also found that dendrites can support action potentials and release neurotransmitters, a property that was originally believed to be specific to axons.

The long outgrowths on immune system dendritic cells are also called dendrites. These dendrites do not process electrical signals.

Certain classes of dendrites (i.e. Purkinje cells of cerebellum, cerebral cortex) contain small projections referred to as "appendages" or "spines". Appendages increase receptive properties of dendrites to isolate signal specificity. Increased neural activity at spines increases their size and conduction which is thought to play a role in learning and memory formation. There are approximately 200,000 spines per cell, each of which serve as a postsynaptic process for individual presynaptic axons.

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