nerve root

noun

plural nerve roots
: the proximal end of a nerve
cranial nerve roots
especially : the initial segment of a spinal nerve where it branches from the spinal cord
The part of the nerve root that is irritated by the damaged disc determines the area where you'll feel pain or develop numbness and weakness. Carol L. Otis
… the onset of spinal analgesia is more rapid than that of epidural analgesia, and spread to the sacral nerve roots is more reliable … Joy L. Hawkins

Examples of nerve root in a Sentence

Recent Examples on the Web While many will equate soft pillows with comfort, those soft pillows lose their shape over time and cause the head and neck to change position, which could result in spinal cord or nerve root compression, according to Dr. Lowenstein. Barbara Bellesi Zito, Peoplemag, 4 Jan. 2024 Spinal stenosis is a condition where the spinal canal or a nerve root is compressed by bone and connective tissue in the back, often as a result of degenerative joint or disk disease. Dr. Keith Roach, oregonlive, 14 Sep. 2023 The sciatic nerve is about 2 centimeters in diameter and consists of the L4 to S2 nerve roots, which join at the pelvis and run down the back of the thigh, says Chellsen. Andi Breitowich, Women's Health, 16 Aug. 2023 This can cause pressure on a nerve root whereas, in the past, there would have been enough space for the nerve not to get squeezed. Lisa Mulcahy, Good Housekeeping, 9 Aug. 2023 Neurological causes can involve the lumbar nerve roots. Stuart Hershman, Verywell Health, 26 June 2023 That expansion relieves pressure on the nerve root. Sarah Fielding, Health, 3 July 2023 Some of these conditions include: Spinal Stenosis Spinal stenosis occurs when the spaces between the spinal vertebra narrow and create pressure on the spinal cord and nerve roots. Stuart Hershman, Verywell Health, 26 June 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'nerve root.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1853, in the meaning defined above

Time Traveler
The first known use of nerve root was in 1853

Dictionary Entries Near nerve root

Cite this Entry

“Nerve root.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nerve%20root. Accessed 20 Apr. 2024.

Medical Definition

nerve root

noun
: the proximal end of a nerve
cranial nerve roots
especially : the initial segment of a spinal nerve where it branches from the spinal cord
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