sensory fiber
Học thuậtThân thiện
Definition
Noun: A nerve fiber that transmits sensory information (impulses) from receptors in the body's periphery (e.g., skin, muscles, organs) toward the central nervous system (the brain and spinal cord). It is responsible for carrying signals related to sensations such as touch, pain, temperature, and proprioception (awareness of body position).
Usage
- Sensory fibers are a fundamental component of the peripheral nervous system.
- They are often discussed in contrast to motor fibers, which carry commands the central nervous system to muscles and glands.
- The term is typically used in medical, biological, and anatomical contexts.
Examples
Advanced Usage
- Classification by Diameter and Function: Sensory fibers are often classified into groups (e.g., Type Ia, Ib, II, III, IV or Aα, Aβ, Aδ, C fibers) based on their diameter, myelination, and the specific type of sensory information they carry (e.g., proprioception, light touch, sharp pain, dull pain, temperature).
- Afferent Fiber: "Sensory fiber" is synonymous with afferent nerve fiber. "Afferent" specifically means "conducting inward or toward a center."
Variants and Related Words
- Afferent fiber: A direct synonym.
- Sensory neuron: Refers to the entire nerve cell, of which the axon is the sensory fiber.
- Sensory nerve: A bundle of many sensory fibers (and often motor fibers) within a peripheral nerve.
- Nociceptive fiber: A specific type of sensory fiber that carries pain signals.
Synonyms
- Afferent fiber
- Afferent neuron (though this refers to the whole cell)
- Sensory nerve fiber
Antonyms
- Motor fiber (or efferent fiber): A nerve fiber that carries impulses the central nervous system to effector organs like muscles.
Noun
- a nerve fiber that carries impulses toward the central nervous system