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 Reference Values of Sensory and Motor Nerve Conduction for Patients of a Fourth Level Hospital in Bogotá, Colombia

2020 ◽  
Vol 61 (4) ◽  
Author(s):  
Carolina García Alfonso ◽  
Nancy Molina ◽  
Sonia Patricia Millán Pérez
Keyword(s):  
Median Nerve ◽  
Ulnar Nerve ◽  
Conduction Velocity ◽  
Nerve Conduction ◽  
Peroneal Nerve ◽  
Tibial Nerve ◽  
Motor Nerve ◽  
Sensory Nerve ◽  
Motor Nerve Conduction ◽  
Significant Difference

Objective: To establish normal values of motor and sensory nerve conductions and late responses for the electrodiagnostic laboratory of the hospital universitario San Ignacio. Materials and Methods: Sensory and motor nerve conduction studies were performed on 77 healthy volunteers between 18 and 65 years old, for a total of 154 analyzes, using a standardized technique for measurement. Results: Motor nerve conduction. For the median nerve the latency ≤4.2ms, amplitude ≥3.1mV and conduction velocity ≥50.8m/s. In the ulnar nerve the latency ≤3.6ms, amplitude ≥4.6mV and conduction velocity ≥49m/s. Tibial nerve latency ≤4.4ms, amplitude ≥5mV and conduction velocity ≥41m/s. Peroneal nerve latency ≤4.8ms, amplitude ≥1.6mV and conduction velocity ≥42m/s. Sensory nerve conduction. For the median nerve the latency ≤2.8ms and conduction velocity ≥45m/s. In the ulnar nerve the latency ≤2.7ms and conduction velocity ≥46m/s. Sural nerve latency ≤2.2ms and conduction velocity ≥41m/s. A Shapiro Wilk test was performed, finding that the amplitude parameters for sensory nerve conductions did not follow a normal distribution, so percentile analysis was performed. Only sex showed a statistically significant difference for the parameters of tibial nerve amplitude (p = 0.0099) being greater in women, and latency of the peroneal nerve (p = 0.0091) being greater in men. Conclusion: Normal parameters were established for motor and sensory nerve conductions and late responses for the electrodiagnostic laboratory of the hospital universitario San Ignacio, which mostly correlate with the current reference data, with certain differences that could be related with height and sex, however, additional studies are required to establish this difference.

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.

scholarly journals Action of Ultrasound Therapy in Altering Motor Nerve Conduction Velocity of Ulnar Nerve

2019 ◽  
Vol 12 (2) ◽  
pp. 843-848 ◽  
Author(s):  
Prathap Suganthirababu ◽  
Jagatheesan Alagesan ◽  
Lavanya Prathap ◽  
M. Manikumar ◽  
A. Kumaresan ◽  
...  
Keyword(s):  
Ulnar Nerve ◽  
Conduction Velocity ◽  
Nerve Conduction ◽  
Nerve Conduction Velocity ◽  
Motor Nerve ◽  
Motor Nerve Conduction Velocity ◽  
Ultrasound Therapy ◽  
Motor Nerve Conduction ◽  
Group A ◽  
Group B

Ultrasound therapy is one of the commonest and most popular modality used for tissue healing, pain reduction, tissue extensibility and in inflammation by physiotherapists all around the globe. Various sensitivity tests on peripheral nerves are done with ultrasound therapy, yet conclusions are still skeptical, which makes it inconclusive in progressing the modality further into management of nerve disorders. This study aimed to analyze efficiency of therapeutic ultrasound in influencing ulnar nerve conduction velocity. To Analyze the effect of ultrasound therapy in altering motor nerve conduction velocity of ulnar nerve with two therapeutic frequencies. 40 healthy individuals were included according to the selection criteria and they were explained about safety and simplicity of procedure and informed consent was obtained. All the participants were randomly assigned into two groups as 20 in each group. Group-A was given ultrasound therapy at specific site of elbow to target the ulnar nerve with 1MHz frequency and Group–B followed the same procedure with 3MHz frequency. Pre and Post to ultrasound therapy application Motor Nerve Conduction Velocity (MNCV) of ulnar nerve were recorded for both the groups. The posttest mean of MNCV for forearm segment and arm segment for Group A and Group B showed statistically significant difference (P Value <0.001).The analysis done by the statistical data also revealed that the MNCV at forearm segment showed an increase in velocity compared to its pretest values, whereas the post MNCV values at arm component showed a decrease in velocity when compared to its pretest values. Among comparison the data within the groups it is evident that group A with 1 MHz of ultrasound sonification is more capable of altering the MNCV values in comparison with the 3MHz. frequency. Findings of this study conclude that ultrasound therapy can be used effectively in altering conduction velocity of a nerve and it has a potential ability to facilitate or inhibit a nerve physiological function.

scholarly journals Normal neurophysiologic parameters of the median nerve among adult healthy Sudanese population

2020 ◽  
Vol 10 (4) ◽  
pp. 136-141
Author(s):  
Mohammed Salah Elmagzoub ◽  
Ahmed Hassan Ahmed ◽  
Hussam M A Hameed
Keyword(s):  
Action Potential ◽  
Median Nerve ◽  
Conduction Velocity ◽  
Nerve Conduction ◽  
Compound Muscle Action Potential ◽  
Motor Nerve ◽  
Sensory Nerve ◽  
Peak Latency ◽  
Muscle Action Potential ◽  
Sensory Nerve Action

Background: Nerve conduction studies (NCSs) help in delineating the extent distribution of neural lesion, and the diagnosis of peripheral nerve disorders. Because normative nerve conduction parameters were not yet established in Sudan EMG laboratories, this study aims towards having our own reference values, as we are using the American and British parameters. This will allow avoiding the discrepancies that might be induced by many factors. Methods: NCSs were performed in 200 Median nerves of 100 adult healthy Sudanese subjects using standardized techniques. Results: The median SNAP (sensory nerve action potential) values were as follows: distal latency, 2.6±3 ms with a range of (2.3-2.9); peak latency, 3.5±0.5 ms (3.0-4.0); amplitude, 47.7±18.0μV (29.7-65.7); conduction velocity, 53.0±7.8 m/s (45.2-60.8). The following values were obtained for the Median nerve CMAP (compound muscle action potential) at wrist stimulation: distal latency, 3.5±0.5 ms with a range of (3.0-4.0); peak latency, 9.4± 1.0 ms (8.4-10.4); duration, 5.9±0.9 ms (5.0-6.8); amplitude, 12.3±2.5 mV (9.8-14.8); area, 43.0±10.4 mVms (32.6-53.4); conduction velocity, 63.6±6.2 m/s (57.4-69.8). The F wave was 28.4±1.8 ms (26.6-30.2). Conclusion: The overall mean sensory and motor nerve conduction parameters for the tested nerve compared favorably with the existing literature with some discrepancies that were justified.

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