Definitions for rhizotomy
raɪˈzɒt ə mirhi·zo·to·my

Princeton's WordNetRate this definition:0.0 / 0 votes

1. rhizotomynoun

   surgical procedure in which spinal nerve roots are cut; done (anterior roots) to relieve intractable pain or (posterior roots) to stop severe muscle spasms

WiktionaryRate this definition:0.0 / 0 votes

1. rhizotomynoun

   The surgical procedure of cutting the anterior or posterior spinal nerve roots in order to relieve pain, or reduce muscle spasms.

WikipediaRate this definition:0.0 / 0 votes

1. Rhizotomy

   This article deals with Selective Dorsal Rhizotomy (SDR) rather than the rhizotomy procedures for pain relief; for those procedures, which have begun to take the name "rhizotomy" in certain instances, see facet rhizotomy and similar. A facet rhizotomy is just one of many different forms of radiofrequency ablation, and its use of the "rhizotomy" name should not be confused with the SDR procedure.A selective dorsal rhizotomy (SDR), also known as a rhizotomy, dorsal rhizotomy, or a selective posterior rhizotomy, is a neurosurgical procedure that selectively destroys problematic nerve roots in the spinal cord. This procedure has been well-established in the literature as a surgical intervention and is used to relieve negative symptoms of neuromuscular conditions such as spastic diplegia and other forms of spastic cerebral palsy. The specific sensory nerves inducing spasticity are identified using electromyographic (EMG) stimulation and graded on a scale of 1 (mild) to 4 (severe spasticity). Abnormal nerve responses (usually graded a 3 or 4) are isolated and cut, thereby reducing symptoms of spasticity.Spasticity is defined as a velocity-dependent increase in muscle tone in response to a stretch. This upper motor neuron condition results from a lack of descending input from the brain that would normally release the inhibitory neurotransmitter gamma amino butyric acid (GABA), which serves to dampen neuronal excitability in the nervous system. Spasticity is thought to be caused by an excessive increase of excitatory signals from sensory nerves without proper inhibition by GABA. Two common conditions associated with this lack of descending input are cerebral palsy and acquired brain injury.

ChatGPTRate this definition:0.0 / 0 votes

1. rhizotomy

   Rhizotomy is a surgical procedure to sever nerve roots in the spinal cord, often used to relieve pain or muscle tension, or to address symptoms of conditions such as cerebral palsy or spastic diplegia. The specific nerve roots to be cut are identified through electrical stimulation, preserving important functions while targeting problematic nerve signals.

WikidataRate this definition:0.0 / 0 votes

1. Rhizotomy

   A rhizotomy is a term chiefly referring to a neurosurgical procedure that selectively destroys problematic nerve roots in the spinal cord, most often to relieve the symptoms of neuromuscular conditions such as spastic diplegia and other forms of spastic cerebral palsy. The selective dorsal rhizotomy for spastic cerebral palsy has been the main use of rhizotomy for neurosurgeons specialising in spastic CP since the 1980s; in this surgery, the spasticity-causing nerves are isolated and then targeted and destroyed. The sensory nerve roots, where spasticity is located, are first separated from the motor ones, and the nerve fibres to be cut are then identified via electromyographic stimulation. The ones producing spasticity are then selectively lesioned with tiny electrical pulses. In spasticity, rhizotomy precisely targets and destroys the damaged nerves that don’t receive gamma amino butyric acid, which is the core problem for people with spastic cerebral palsy. These over-firing, non-GABA-absorbing nerves generate unusual electrical activity during the EMG testing phase in SDR and are thus considered to be the source of the patient's hypertonia; they are eliminated with the electrical pulses once identified, while the remaining nerves and nerve routes carrying the correct messages remain fully intact and untouched. This means that the spasticity is permanently dissolved, and that this is done without affecting nervous system sensitivity or function in other areas, because the only nerves destroyed are the over-firing ones responsible for the muscle tightness.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Rhizotomy

   Surgical interruption of a spinal or cranial nerve root. (From Dorland, 28th ed)

Matched Categories

1. • Operation

Usage in printed sourcesFrom: 

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How to pronounce rhizotomy?

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   Daniel

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How to say rhizotomy in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of rhizotomy in Chaldean Numerology is: 2

2. Pythagorean Numerology

   The numerical value of rhizotomy in Pythagorean Numerology is: 5

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=rhizotomy
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Rhizotomy
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Rhizotomy
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=rhizotomy
6. ^ Usage in printed sources
   https://books.google.com/ngrams/graph?content=rhizotomy