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Primary sensory neurons in the central nervous system
1Laboratory of Neuronal Functional Morphology and Physiology, IP Pavlov Institute of Physiology, Russian Academy of Sciences, St. Petersburg.
Neuroscience and Behavioral Physiology
|April 29, 2006
Summary
This study explores sensory neurons in the brain and spinal cord, differentiating between exteroceptors and interceptors. It proposes that the brain has intrinsic sensory innervation, similar to other organs.
Area of Science:
- Neuroscience
- Sensory Biology
Background:
- Published data and novel results on exteroceptor and interceptor neurons in the central nervous system are reviewed.
- Includes various neuron types like Hesse ocelli, epiphyseal, ependymal, and ganglion neurons, as well as spinal cord sensory neurons.
Purpose of the Study:
- To present and generalize data on intracortical interoceptors in vertebrates.
- To hypothesize the existence of intrinsic sensory innervation in animal and human brains.
Main Methods:
- Review and synthesis of published data on neuronal structures.
- Generalization of data into a unified scheme for intracortical interoceptors.
Main Results:
- Description of diverse exteroceptor and interceptor neurons in the brain and spinal cord.
- Characterization of light-sensitive neurons, chemo- and thermosensitive neurons, and specific sensory neurons (Motavkin's central nerves).
Conclusions:
- Vertebrate intracortical interoceptors are generalized into a single scheme.
- The brain is hypothesized to possess intrinsic sensory innervation with local primary sensory neurons and asynaptic dendrites, categorized as interceptors and exteroceptors.