Peripheral sensory nerve fiber (None commonly used; sometimes abbreviated as "sensory nerve fiber" in literature, but no standardized abbreviation.)

A peripheral sensory nerve fiber is an axon belonging to a primary afferent neuron located outside the brain and spinal cord. These fibers transmit information about touch, temperature, pain/nociception, proprioception and other modalities from tissues throughout the body toward the central nervous system. They vary widely in diameter and myelination status—from large myelinated Aα/Aβ-fibers responsible for fast conduction such as proprioceptive signals and touch—to small unmyelinated C-fibers responsible primarily for slow-conducting pain and temperature sensations. Peripheral sensory nerves play essential roles in normal sensation as well as pathological conditions such as neuropathic pain when damaged or dysfunctional.

Other names

Sensory nerve fiberAfferent nerve fiberPeripheral afferent neuronSomatic sensory fiberVisceral sensory fiber

Not applicable at this level for the 'fiber' itself. Mechanisms relate instead to inhibition/modulation of action potential propagation via blockade/modulation of ion channels/receptors present in these nerves. For example, blockade of voltage-gated sodium channels inhibits action potential propagation, and TRPV1 antagonists reduce nociceptive signaling.