Ganglion: meaning, definitions and examples
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ganglion
[ ˈɡæŋɡliən ]
anatomy structure
A ganglion is a structure containing a collection of nerve cell bodies, found in the peripheral nervous system. They serve as relay points for transmitting signals throughout the body. Ganglia can be associated with either sensory or motor functions. In the central nervous system, similar structures are known as nuclei. Pathological ganglia can sometimes arise in the context of diseases or conditions affecting the nervous system.
Synonyms
ganglionic structure, nerve center, nerve cluster.
Examples of usage
- The sensory ganglion transmits signals from the skin.
- In surgical procedures, ganglia may be removed to alleviate pain.
- Ganglia are essential for reflex actions in the body.
Etymology
The word 'ganglion' comes from the Greek 'ganglion,' meaning 'a swelling,' which in turn is related to 'gagnein,' meaning 'to swell.' In early anatomical studies, this term was used to describe the knots or swellings found where nerve fibers converge, reflecting the physical appearance of these structures. The usage of this term has evolved as our understanding of neuroanatomy has expanded, but it remains rooted in its original meaning related to swelling or aggregation. The term was widely adopted in the medical literature since the 19th century, particularly as neuroanatomy began to take shape as a distinct field of study.