Medical research

A specific subset of immune cells that mitigates kidney damage

The immune system is highly complex. For example, a particular class of cells called mononuclear phagocytes (MNPs) plays important roles in the uptake and disposal of damaged cells, the elimination of invasive pathogens and ...

Neuroscience

Imaging single spine structural plasticity at the nanoscale level

For most, the relentless snapping of camera shutters is an all-too-familiar sound associated with trips and vacations. When venturing to a new place, travelers everywhere are constantly on the search for that picture-perfect, ...

Immunology

How immune cells survive their battle with cancer

The body's immune system can recognize and attack cancer cells, but when those are able to overcome this assault, malignant tumors develop in patients. New research led by investigators at Massachusetts General Hospital (MGH) ...

Psychology & Psychiatry

Psychedelic spurs growth of neural connections lost in depression

The psychedelic drug psilocybin, a naturally occurring compound found in some mushrooms, has been studied as a potential treatment for depression for years. But exactly how it works in the brain and how long beneficial results ...

Diseases, Conditions, Syndromes

A promising two-punch therapy for Langerhans cell histiocytosis

Langerhans cell histiocytosis (LCH) is a rare cancer involving dendritic cells, a type of white blood cell that usually helps defend against infections. The current standard of care for LCH, chemotherapy, cures fewer than ...

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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.

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