Radial motor nerve conduction studies in the upper arm

Khodulev, Vasily; Нечипуренко, Н. И.; Shcharbina, Natallia Yu

doi:10.1002/mus.27006

Cited by 1 publication

(5 citation statements)

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“…Another feature of axonal degeneration observed in this case was a decrease in the median and median+ulnar CMAP areas compared to those of the unaffected side and affected side after recovery (as seen in Figure 2 and Table 2), similar to what was observed in traumatic radial neuropathy [4]. This phenomenon can be attributed to the structural changes that occur in the muscles innervated by the radial nerve, leading to partial attenuation of the volume-conducted signal from the intact anterior compartment of the forearm muscles.…”

Section: Discussionsupporting

confidence: 82%

“…Radial NCSs were conducted using the technique described previously [ 4 ]. The compound muscle action potential (CMAP) was elicited from the extensor digitorum muscle by stimulating six different points (Figure 2A ).…”

Section: Resultsmentioning

confidence: 99%

“…Axonal degeneration results in a reduction in the amplitude and area of the CMAP due to a decrease in axonal number. NCSs can be used to evaluate radial motor nerve fibers, although they are more complex than those used for median and ulnar nerves [ 4 , 13 ].…”

Section: Discussionmentioning

confidence: 99%

“…The presence of a CB confirmed the presence of focal demyelination. The normal conduction velocity values observed in the upper arm are attributed to the activity of the median and ulnar nerves upon brachial plexus stimulation [ 4 ]. Axonal degeneration was confirmed both electrophysiologically and clinically in our study.…”

Section: Discussionmentioning

confidence: 99%

“…In humans, this may be even shorter, as studies have described paresis of the foot appearing during fibular nerve compression in as little as 25 minutes [ 18 ]. We previously identified two cases where compressive radial neuropathy appeared during 20 to 30 minutes of sleep [ 4 ], and another case was reported where paresis of the hand extensor developed after leaving the arm hanging over the armrest of a chair for 30 minutes [ 19 ]. The minimum time for the onset of acute numbness or weakness associated with handcuffs was 15 minutes [ 6 ].…”

Section: Discussionmentioning

confidence: 99%

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Acute Radial Compressive Neuropathy: The Most Common Injury Induced by Japanese Rope Bondage

Khodulev,

Klimko,

Charnenka

et al. 2023

Cureus

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Japanese rope bondage (RB), or Shibari, is an art form involving the voluntary and aesthetic binding of a person with a rope, which may result in compression injuries to peripheral nerves. To investigate the nature and extent of nerve injuries associated with this practice, we conducted a survey of four experienced RB practitioners (riggers) and participants who were willing to share their experiences of injury. Injuries presented acutely and immediately following full-body suspensions, with a total of 10 individuals (16 injuries) identified with damage to the radial, axillary, or femoral nerves. Notably, the radial nerve was the most commonly affected structure in our patient cohort, with 90.0% of individuals experiencing an injury at this level. We present a rare case of acute repeated compression of the radial nerve during full-body suspension RB. A 29-year-old female was suspended for 25 minutes using a 6-mm jute rope, resulting in wrist and finger drop, as well as reduced sensation in the left hand. Analysis revealed a 77.3% conduction block in the upper arm segment. Improvement was observed after three months, fully achieved after five months. Seventeen months later, re-compression of both radial nerves occurred during a similar suspension lasting 8-10 minutes. Improvement occurred after one week, fully achieved after four weeks. The third compression episode occurred three years later, lasting five minutes, with full recovery within two minutes. This study focuses on the injury of peripheral nerves, including the radial, axillary, and femoral nerves, namely, acute compression neuropathy induced by Japanese RB. Because the radial nerve is the most frequently injured structure, the findings underscore the significance of recognizing the anatomical course of the radial nerve, particularly its position posteriorly at the distal deltoid tuberosity level, as a means of preventing nerve injury in this region. This knowledge is particularly crucial for individuals engaged in the practice of RB, emphasizing the importance of taking precautions to avoid potential nerve damage.

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Section: Discussionsupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%