News tagged with dendrites

Related topics: nerve cells · neurons

What's in a placenta? A transcriptomic view

I didn't think much about placentas until I had one and part of it dislodged halfway through a 4-mile run. Happily it ended well some months later with a "small for gestational age" tiny baby and a "large for just giving ...

Mar 31, 2017
popularity1 comments 0

Optimized sensors to study learning and memory

Learning and memory are crucial aspects of everyday life. When we learn, our neurons use chemical and molecular signals to change their shapes and strengthen connections between neurons, a process known as synaptic plasticity. ...

Mar 09, 2017
popularity23 comments 0

A framework for characterizing dendritic cells

Immunological sentinels known as dendritic cells (DCs) help the body eliminate a wide variety of potential threats, from pathogens to cancer—but they are not all created equal. Some DCs are better at fighting bacteria, ...

Feb 22, 2017
popularity0 comments 0

T cells support long-lived antibody-producing cells

If you've ever wondered how a vaccine given decades ago can still protect against infection, you have your plasma cells to thank. Plasma cells are long-lived B cells that reside in the bone marrow and churn out antibodies ...

Feb 21, 2017
popularity68 comments 0

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.

This text uses material from Wikipedia, licensed under CC BY-SA

Subscribe to rss feed