Hypoexcitability of ulnar nerve in patients with normal motor nerve conduction velocities

Neurology ◽  
1973 ◽  
Vol 23 (1) ◽  
pp. 78-78 ◽  
Author(s):  
E. A. Wright ◽  
M. P. McQuillen
Keyword(s):  
Ulnar Nerve ◽  
Nerve Conduction ◽  
Motor Nerve ◽  
Motor Nerve Conduction ◽  
Conduction Velocities

scholarly journals Ulnar Nerve Enlargement at the Medial Epicondyle Negatively Correlates With Nerve Conduction Velocity in Cubital Tunnel Syndrome

Hand ◽  
2018 ◽  
Vol 15 (2) ◽  
pp. 165-169
Author(s):  
T. David Luo ◽  
Amy P. Trammell ◽  
Luke P. Hedrick ◽  
Ethan R. Wiesler ◽  
Francis O. Walker ◽  
...  
Keyword(s):  
Ulnar Nerve ◽  
Nerve Conduction ◽  
Nerve Conduction Velocity ◽  
Motor Nerve ◽  
Cubital Tunnel Syndrome ◽  
Medial Epicondyle ◽  
Cubital Tunnel ◽  
Motor Nerve Conduction ◽  
Nerve Enlargement ◽  
Tunnel Syndrome

Background: In cubital tunnel syndrome (CuTS), chronic compression often occurs at the origin of the flexor carpi ulnaris at the medial epicondyle. Motor nerve conduction velocity (NCV) across the elbow is assessed preoperatively to corroborate the clinical impression of CuTS. The purpose of this study was to correlate preoperative NCV to the direct measurements of ulnar nerve size about the elbow at the time of surgery in patients with clinical and/or electrodiagnostic evidence of CuTS. Methods: Data from 51 consecutive patients who underwent cubital tunnel release over a 2-year period were reviewed. Intraoperative measurements of the decompressed nerve were taken at 3 locations: at 4 cm proximal to the medial epicondyle, at the medial epicondyle, and at the distal aspect of Osborne fascia at the flexor aponeurotic origin. Correlation analysis was performed comparing nerve size measurements to slowing of ulnar motor nerve conduction velocities (NCV) below the normal threshold of 49 m/s across the elbow. Results: Enlargement of the ulnar nerve at the medial epicondyle and nerve compression at the flexor aponeurotic origin was a consistent finding. The mean calculated cross-sectional area of the ulnar nerve was 0.21 cm2 above the medial epicondyle, 0.30 cm2 at the medial epicondyle, and 0.20 cm2 at the flexor aponeurotic origin ( P < .001). There was an inverse correlation between change in nerve diameter and NCV slowing ( r = −0.529, P < .001). Conclusions: For patients with significantly reduced preoperative NCV and clinical findings of advanced ulnar neuropathy, surgeons can expect nerve enlargement, all of which may affect their surgical decision-making.

Maximum Motor Nerve Conduction Velocity in XYY Males

1973 ◽  
Vol 45 (3) ◽  
pp. 337-345
Author(s):  
M. O. Wright
Keyword(s):  
General Population ◽  
Median Nerve ◽  
Ulnar Nerve ◽  
Conduction Velocity ◽  
Nerve Conduction ◽  
Motor Nerve ◽  
Control Groups ◽  
Motor Nerve Conduction ◽  
Significant Prolongation ◽  
Hospital Group

1. Maximum motor nerve conduction velocities were determined under standard conditions for the median and ulnar nerves in the right forearm in males: (a) from the general population, (b) from a subnormality hospital, and (c) in males with the XYY sex chromosome abnormality. Distal latencies for these nerves were also measured. 2. No significant differences in maximum peripheral motor nerve conduction were found between the two control populations from the general population and from the subnormality hospital. 3. The maximum motor conduction velocity in the median nerve in the XYY group was significantly slowed when compared with both control groups. In the case of the ulnar nerve, maximum motor conduction was significantly slowed when compared with the general population, but not when compared with the subnormality hospital group. 4. There were no significant differences in the mean distal latencies of either the median or ulnar nerves between the two control groups. 5. In the XYY group, the distal latency in the ulnar nerve was significantly prolonged when compared with both control groups. In the case of the median nerve, the distal latency was prolonged significantly when compared with the general population; when the comparison was made with the subnormality hospital group significant prolongation was also observed but was less marked.

scholarly journals Motor nerve conduction study parameters in healthy individuals: effect of limb dominance

2019 ◽  
Vol 7 (4) ◽  
pp. 1330
Author(s):  
Binnam Shakya ◽  
Dilip Thakur ◽  
Bishnu H. Paudel ◽  
Rita Khadka ◽  
Suman Pokhrel
Keyword(s):  
Ulnar Nerve ◽  
Nerve Conduction Study ◽  
Nerve Conduction ◽  
Motor Nerve ◽  
Healthy Individuals ◽  
Motor Nerve Conduction ◽  
Left Handed ◽  
F Wave ◽  
Wave Minimum ◽  
Limb Dominance

Background: Nerve conduction study (NCS) is useful for evaluation of nerve, muscle, and/or neuromuscular function. Neurophysiologist interprets NCS with consideration of various anthropometric and technical parameters viz. age, gender, height, temperature etc. apart from the underlying pathology. Fewer studies have reported the effect of limb dominance on NCS. Moreover, the findings are controversial. Therefore, author aimed to investigate the effect of limb dominance on motor nerve conduction study parameters.Methods: This cross-sectional comparative study included sixty healthy individuals (44 right and 16 left handed) of either sex with age 18 to 30 years. The NCS parameters of median and ulnar nerves were assessed by stimulating it and recording from the muscle and skin overlying the nerve respectively using Digital Nihon Kohden machine. The obtained data were analyzed using independent sample t-test.Results: Right ulnar nerve onset latency was significantly longer in left-handed individuals (1.85±0.508 ms vs 1.62±0.195 ms, p=0.012). The left ulnar nerve F wave minimum latency (25.88±0.74 ms vs 24.46±2.64 ms, p=0.002) was significantly longer in left-handed individuals. Likewise, right ulnar nerve distal latency (2.45±0.76 ms vs 2.14±0.39 ms, p=0.044), and right ulnar nerve F wave minimum (25.9±1.21 ms vs 24.85 ms±1.74, p=0.030) were significantly high in left-handed individuals.Conclusions: NCS parameters in terms of latencies were longer in left-handed individuals. Therefore, limb dominance seems to be an important factor one should pay attention during bilateral comparison of obtained data in neurophysiological reporting of referred cases.

scholarly journals The role of motor nerve conduction: in cervical radiculopathy patients

2019 ◽  
Vol 7 (9) ◽  
pp. 3276
Author(s):  
Meenakshi Garg ◽  
Saurabh Gupta ◽  
Sushma Sood ◽  
Mohita Singh
Keyword(s):  
Median Nerve ◽  
Ulnar Nerve ◽  
Nerve Root ◽  
Nerve Conduction ◽  
Motor Nerve ◽  
Cost Effective ◽  
Cervical Radiculopathy ◽  
Neurological Deficits ◽  
Specific Test ◽  
Motor Nerve Conduction

Background: Cervical radiculopathy is the clinical description of when a nerve root in the cervical spine becomes inflamed or damaged, resulting in a change in neurological function. Neurological deficits, such as numbness, altered reflexes, or weakness, may radiate from the neck into the shoulder, arm, hand, or fingers. Patient also complains of tingling, numbness or loss of sensation along with the nerve root dermatome. It is a substantial cause of disability and morbidity, and its cost-effective evaluation and treatment are crucial so there is a definite need to establish a cost effective, reliable, and accurate means for establishing the diagnosis of cervical radiculopathy. Electrodiagnostic tests are the closest to fulfil these criteria out of which nerve conduction tests are one of the electrodiagnostic test.Methods: In this study motor nerve conduction of ulnar and median nerve done in 30 clinically proven cervical radiculopathy patientsResults: There are significant decrease in the conduction velocity of both nerve (median nerve (51.60±7.5), Ulnar nerve (50.60±5.6)) and significantly increased in the mean latency of both nerve (median nerve (6.02±2.4), ulnar nerve (5.8±1.8)).Conclusions: Authors concluded that MNC is the specific test for the diagnosis of cervical radiculopathy. At least the MNC of both nerves included in diagnostic criteria of cervical radiculopathy.

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