Electromyography and clinical neurophysiology
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Recurrent Guillain Barre' syndrome.
We report 11 patients with RGBS out of 200 patients with GB syndrome seen over last 10 years. These patients had 2 or more attacks of acute inflammatory demyelinating neuropathy with an onset to peak time of 4 weeks or less having complete or near complete recovery. All the patients underwent comple...
Combined median and medial antebrachial cutaneous neuropathies: an upper-arm neurovascular syndrome.
We report a patient with a iatrogenic brachial artery injury in this region who featured combined median and MAC neuropathies, which were consistent with complete axonotmesis on neurophysiological assessment. Increased intracompartmental pressure may have led to nerve injury either thorough an ische...
Nerve conduction changes during lower limb lengthening. Somatosensory evoked potentials (SEPs) and F-wave results.
We calculated that, on average, each cm of lengthening could produce 0.21 msec and 0.22 msec delays respectively, suggesting a similar effect of the stretching on both sensory and motor fibers. Our findings indicated that the damage could be widely distributed along the whole length of the nerve, af...
H reflex excitability following voluntary muscle contraction of different duration.
The importance of the duration of contraction on the excitability of the motoneuronal pool was evaluated by measuring the H reflex from soleus muscle after short and long contractions at constant effort equal to 60% maximal voluntary contraction (MVC); the difference between the amplitude of H refle...
Simulation of the influence of different factors on the motor nerve condition velocity measurement. Part 1: Normal conditions.
I describes the model and reports results from calculations on simulated normal nerves. The results are in concert with results from healthy volunteers. Part II reports on results in pathological conducting nerves. The effect of the different factors affecting the nerve conduction velocities are sho...
Standardisation of neurophysiological norm values. Relevance of the position of the heating element and the temperature measurement sensor.
We measured the influence of the position of the temperature measurement sensor and the infrared heating element on the nervous conduction velocity (NCV) and the delay in latency after paired stimulation (LPSS) of the sural nerve. Temperature differences of up to 6.2 degrees C resulted from alterati...
Posterior antebrachial cutaneous neuropathy. Case report.
Our study showed the sensory nerve conduction test is useful in confirming PABC neuropathy....
The clinical use of surface EMG.
Effect of load level on the emg spectra of longissimus thoracis muscle during isometric fatiguing contractions.
The present study analyzed the effect of different magnitudes of isometric contraction of longissimus thoracis muscle until fatigue by means power spectra analysis. Eight healthy male subjects volunteered for this study The electromyography signals were sampled at 1 kHz using surface electrodes plac...
A transient VEP-based real-time brain-computer interface using non-direct gazed visual stimuli.
We previously proposed a BCI using a non-direct gazing method based on transient VEPs. This interface used a low-speed blinking lattice pattern as visual stimuli and visual targets displayed on the right and the left sides of the stimuli. The gazing direction was determined by the waveform differenc...