Navigation Links
Dendrite


For the crystal, see Dendrite (crystal).

In biology, a dendrite is a slender, typically branched projection of a nerve cell, or "neuron," which conducts the electrical stimulation received from other cells to the body or soma of the cell from which it projects. This stimulation arrives through synapses, which typically are located near the tips of the dendrites and away from the soma.

Dendrites were once believed to merely convey stimulation passively, without action potentials and without activation of voltage-gated ion channels. In such dendrites the voltage change that results from stimulation at a synapse may extend both towards and away from the soma. In other dendrites, voltage-gated channels help propagate excitatory synaptic stimulation whether or not an action potential is present. This propagation is efficient only toward the soma due to an uneven distribution of channels along such dendrites.

Scientists have shown that action potentials do propagate back into the dendrites once initiated in the axon in most neurons. This backpropagating action potential is mediated by the activation of voltage-gated ion channels and can interact with synaptic input to alter the synaptic activity.

The structure and branching of a neuron's dendrites strongly influences how it integrates the input from many others, particularly those that input only weakly (more at synapse). This integration is in aspects "temporal" -- involving the summation of stimuli that arrive in rapid succession -- as well as "spatial" -- entailing the aggregation of excitatory and inhibitory inputs from separate branches or "arbors."

The term "dendrite" comes from the Greek word dendron, meaning "tree".

Compare: axon

See also: dendritic spine


'"/>


(Date:12/15/2014)... 2014 Research and Markets ( http://www.researchandmarkets.com/research/87pph8/global_facial ) ... Recognition Market 2015-2019" report to their offering. ... recognition is a technology used for the identification of ... of a person such as nose, jaw edges, mouth, ...
(Date:12/11/2014)... , Dec. 10, 2014  Data Sciences International (DSI), ... released a new series of digital telemetry implants ... researchers. M series, part of the PhysioTel™ Digital ... best possible physiologic data when incorporating functional endpoints ...
(Date:12/10/2014)... , Dec. 9, 2014 CIE San Diego has launched ... connective tissue that enhances care coordination among social service and ... earned a second $1 million grant from the Alliance Healthcare ... and; will be recognized as a "Live Well San Diego" ...
Breaking Biology News(10 mins):Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 3New telemetry implants expected to change how large animal toxicology studies are conducted 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4
... KAN. -- Research from a Kansas State University professor ... injury or to study neurological disorders. Mark Weiss, ... for spinal cord injury or diseases such as Parkinson,s ... therapy and regenerative medicine -- a type of research ...
... Wales and the United States have collaborated to complete ... energy crop called miscanthus. The results published in ... PLoS One provide a significant breakthrough towards ... results from the long-term collaboration between energy crop company ...
... study by Indiana University researchers confirm anecdotal evidence that ... to female orgasm. While the findings are ... of its association with exercises for core abdominal muscles, ... Herbenick, co-director of the Center for Sexual Health Promotion ...
Cached Biology News:Genetic research develops tools for studying diseases, improving regenerative treatment 2First complete full genetic map of promising energy crop 2First complete full genetic map of promising energy crop 3Study: Exercise can lead to female orgasm, sexual pleasure 2Study: Exercise can lead to female orgasm, sexual pleasure 3
Other biology definitionOther Tags