Definition

1. Noun:
   • A neuron conducting impulses inwards to the brain or spinal cord: A sensory neuron is a specialized nerve cell (neuron) responsible for transmitting sensory information from receptors in the body (e.g., in the skin, eyes, ears) toward the central nervous system (the brain and spinal cord) for processing.

Usage

• Sensory neurons are a fundamental component of the nervous system, enabling the perception of stimuli such as touch, temperature, sound, and light.
• They are also known as , highlighting their function of carrying signals the central nervous system.

Examples

• Noun:
  • When you touch a hot surface, a sensory neuron carries the signal of heat and pain to your spinal cord.
  • Sensory neurons in the retina convert light into electrical signals sent to the brain.
  • Damage to sensory neurons can result in a loss of sensation, such as numbness.

Advanced Usage

• "Sensory neuron pathway": Refers to the route taken by a sensory signal from the receptor to the central nervous system.
  • The sensory neuron pathway for smell is particularly direct, leading to the olfactory bulb.
• "Primary sensory neuron": Specifically denotes the first neuron in a sensory pathway, directly connected to a sensory receptor.
  • The primary sensory neuron for touch has its cell body located in the dorsal root ganglion.

Variants and Related Words

• Afferent neuron (n): A direct synonym for sensory neuron, emphasizing the direction of signal conduction (toward the CNS).
• Receptor cell (n): A cell that detects a specific type of stimulus; it may synapse with or be part of a sensory neuron.
• Interneuron (n): A neuron that processes signals sensory and motor neurons within the central nervous system.
• Motor neuron (n): An neuron that conducts impulses from the brain or spinal cord to muscles or glands.

Synonyms

• Afferent nerve cell: A synonym that explicitly describes the function.
• Sensory nerve cell: A common alternative phrasing.

Related Phrases

• Sensory input: The information provided by sensory neurons.
  • The brain integrates sensory input from millions of sensory neurons.
• Sensory transduction: The process by which a sensory receptor cell converts a stimulus into an electrical signal in a sensory neuron.
  • Sensory transduction in the ear involves hair cells and auditory sensory neurons.

Noun

1. a neuron conducting impulses inwards to the brain or spinal cord