nerve fiber
Conducts electrical impulses
A nerve fiber is the long, thread-like extension of a nerve cell that carries electrical impulses.
These fibers—also called axons—transmit signals between the brain, spinal cord, and body.
Bundles of nerve fibers form the nerves that run throughout the body: Damage to nerve fibers can cause numbness or pain.
Neuron's signal-sending projection
- dendriteNeuron's input branch
- myelinNerve fiber insulation
- synapseNerve signal crossing point
- nodes of RanvierGaps in nerve insulation
ganglion · glia · astrocyte · soma · fascicle · white matter · tract
Sudden urge to act
- action potentialNeuron's rapid electrical discharge
- conductionHeat transfer through contact
- transmissionSending of information
- depolarizationLoss of electrical gradient
polarization · saltatory conduction · signal · refractory period · threshold · propagation · stimulus · excitation
Bodily or emotional distress
- touchPerceiving through physical contact
- temperatureMeasured heat intensity
- pressureForce upon contact
- proprioceptionBody's spatial self-awareness
mechanoreceptor · thermoreceptor · afferent · receptor · tactile · sensory · stimulus · perception
Having fatty nerve coating
- unmyelinatedLacking nerve fiber coating
- afferentConveying toward central point
- efferentConveying outward from center
- sensoryRelated to perception
motor · autonomic · somatic · sympathetic · parasympathetic · peripheral · central · cranial
axon
Neuron's signal-sending projection
nodes of Ranvier · ganglion · glia · astrocyte · soma · fascicle · white matter · tract
impulse
Sudden urge to act
- action potentialNeuron's rapid electrical discharge
- conductionHeat transfer through contact
- transmissionSending of information
depolarization · polarization · saltatory conduction · signal · refractory period · threshold · propagation · stimulus · excitation · inhibition
pain
Bodily or emotional distress
- touchPerceiving through physical contact
- temperatureMeasured heat intensity
- pressureForce upon contact
proprioception · mechanoreceptor · thermoreceptor · afferent · receptor · tactile · sensory · stimulus · perception · acuity
myelinated
Having fatty nerve coating
- unmyelinatedLacking nerve fiber coating
- afferentConveying toward central point
- efferentConveying outward from center
sensory · motor · autonomic · somatic · sympathetic · parasympathetic · peripheral · central · cranial · spinal
- body partsarm, leg, hand, back, chest
- tissuesadipose, cardiac tissue, fibrous tissue, bone, connective
- long shapestube, cylinder, rod, stick, pole
- nervous systembrain, neurons, nerves, spinal cord, axon
- neuroscienceMRI, brain, neurons, synapses, dendrite
- Neuron Partsdendrite, dendrites, myelin sheath, synapse, cell body