Related Experiment Video
Updated: Jan 22, 2026
Nerve Ultrasound Protocol to Detect Dysimmune Neuropathies
Published on: October 7, 2021
An Unusual Radial Neuropathy
Abstract:
A 23-year-old woman presented to her physician for left forearm pain of insidious onset, inability to extend the wrist, and numbness in the dorsal hand. An electromyogram (EMG) and nerve conduction study (NCS) demonstrated radial neuropathy, while magnetic resonance imaging (MRI) of the left elbow/forearm, performed 2 months later, revealed edema and atrophy of the wrist extensor muscles, but no compressive lesion. Following a lack of improvement and consultation with an orthopaedic surgeon, a second, more detailed EMG/NCS was performed, revealing a severe radial motor and sensory neuropathy, with compression between the lateral and long heads of the triceps. J Orthop Sports Phys Ther 2019;49(7):558. doi:10.2519/jospt.2019.7927.
Related Concept Videos
01:16Unusual Results
According to the range rule of thumb, any value above or below two standard deviations, 2σ from the mean, μ is considered unusual.
Maximum unusual value =...
01:07z Scores and Unusual Values
This score indicates how far a value is from the mean in terms of standard deviation. For example, if a data value has a z score of +1, the researcher can infer that the particular data value is one standard deviation above the mean. If another data...
01:23Radial System Protection
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
01:11Assessment of radial pulse
The radial pulse, located at the wrist, is often the preferred site for assessing peripheral pulse because of its accessibility and dependability. The process of determining the radial pulse involves several steps:
01:25Assessment of apical radial pulse
The A-R pulse assessment involves simultaneous evaluation of the apical and radial pulses. When the apical and radial pulse rates vary, this assessment helps identify a pulse deficit.
Pre-Procedural Preparation
02:18Network Covalent Solids
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...