|A delta fiber |
|A delta fiber not labeled, but fibers terminate at Rexed lamina I, labeled at upper left. |
|Dorlands/Elsevier ||f_05/12360464 |
A delta fibers (Aδ) are the fibers which convey fast pain information. Image File history File links Medulla_spinalis_-_Substantia_grisea_-_English. ...
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Look up Pain in Wiktionary, the free dictionary. ...
They are much faster than the C fibers because they are myelinated, but they are much thinner than other "A" caliber nerve fibers, so they conduct signals more slowly than the other fibers of that class. C-fibers are unmyeliniated and as a result, have a slower conduction velocity, lower than 2 m/s. ...
In neuroscience, myelin is an electrically insulating phospholipid layer that surrounds the axons of many neurons. ...
The fibers terminate at Rexed lamina I.
Histology: nervous tissue
|Neurons (gray matter) ||soma, axon (axon hillock, axoplasm, axolemma, neurofibril/neurofilament), dendrite (Nissl body, dendritic spine) |
types (bipolar, pseudounipolar, multipolar, pyramidal, Purkinje, granule)
|Afferent nerve/Sensory nerve/Sensory neuron ||GSA, GVA, SSA, SVA, fibers Ia, Ib or Golgi, II or Aβ, III or Aδ or fast pain, IV or C or slow pain |
|Efferent nerve/Motor nerve/Motor neuron ||GSE, GVE, SVE, Upper motor neuron, Lower motor neuron (Aα motorneuron, Aγ motorneuron) |
|Synapses ||neuropil, synaptic vesicle, neuromuscular junction, electrical synapse - Interneuron (Renshaw) |
|Sensory receptors ||Free nerve ending, Meissner's corpuscle, Merkel nerve ending, Muscle spindle, Pacinian corpuscle, Ruffini ending, Olfactory receptor neuron, Photoreceptor cell, Hair cell, Taste bud |
|Glial cells ||astrocyte, ependymal cells, microglia, radial glia |
|Myelination (white matter) ||Schwann cell, oligodendrocyte, nodes of Ranvier, internode, Schmidt-Lanterman incisures, neurolemma |
|Related connective tissues ||epineurium, perineurium, endoneurium, nerve fascicle, meninges |