The needle electromyography findings in the neurophysiological classification of ulnar neuropathy at the elbow

Abstract

Background/aim: Although ulnar neuropathy at the elbow (UNE) is the second most common entrapment mononeuropathy, there are few reports on its neurophysiological classification. In this study, we tried to find out the role of needle electromyography (EMG) in the neurophysiological classification of UNE. Materials and methods: UNE patients who met the clinical and neurophysiological diagnostic criteria and healthy individuals were included in this study. Reference values of nerve conduction studies were obtained from healthy individuals. Needle EMG was performed to all UNE patients. According to the neurophysiological classification proposed by Padua, UNE patients were classified as mild, moderate, and severe. Results: Thirty-one controls and thirty-five UNE patients were included in the study. There was mild UNE in 23 patients, moderate UNE in 8, and severe UNE in 4. Abnormal needle EMG findings were present in all patients with moderate and severe UNE and in 12 patients with mild UNE. Conclusion: Abnormal needle EMG findings are seen in most of the UNE patients. Therefore, it is not practical to use needle EMG findings in the neurophysiological classification. Needle EMG abnormalities may also be present in patients with mild UNE due to axonal degeneration or motor conduction block.

The relationship between nerve conduction studies and neuropathic pain in sciatic nerve injury due to intramuscular injection

“…To exclude peroneal neuropathy at the fibular head, the peroneal nerve was stimulated at the ankle, below the fibular head, and at the popliteal fossa. Median and ulnar nerve conduction studies were performed using conventional methods as mentioned in our previous study [ 6 ].…”

“…The reference values for nerve conduction studies in our previous studies were used as upper or lower limits of normal values [ 6 , 7 ]. The reference lower limits for CMAP amplitudes of the tibial nerve recorded from the abductor hallucis muscle and the peroneal nerve recorded from the extensor digitorum brevis/TA muscle were 4.2 mV and 3.7/3.9 mV, respectively.…”

The relationship between fatigue, neuropathic pain, and neurophysiological features in carpal tunnel syndrome

“…Lower reference limits for CNAP amplitude and NCV across the 2 nd finger-wrist segment were 15 µV and 40.9 m/s, respectively. [12,13] The lower reference limit for median nerve CMAP amplitude and the upper reference limit for median nerve CMAP distal latency were 4.3 mV and 3.7 ms, respectively. [13] The neurophysiological classification of CTS was as follows: [2,3,5,6] Mild CTS-slowing of median sensory NCV across the 2nd finger-wrist segment, Moderate CTS-slowing of the median sensory NCV across the 2nd finger wrist segment, and delayed median nerve CMAP distal latency, Severe CTS-Absence of median nerve CNAP and delayed median nerve CMAP distal latency, Very severe CTS-Absence of median nerve CNAP and CMAP.…”

“…Previously suggested methods and reference values were used for nerve conduction study. [12,13] Superficial electrodes were used for stimulation and recording. Stimulation was done supramaximally.…”

Vücut Kitle İndeksi ve Mononöropatiler Arasındaki İlişki

“…A nerve conduction study was performed in one upper and one lower extremity of the controls. Protocols for the median, ulnar, peroneal, posterior tibial, superficial peroneal, and sural nerve conduction studies were made using conventional methods (17)(18)(19). Reference values of ACTRH Clinical Neurophysiology Laboratory were used for routine nerve conduction studies (18,19).…”