Absence of F Waves (left image). Low persistence of F waves (right image).  

Absence of F Waves (left image). Low persistence of F waves (right image).  

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Research
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Background: the objective of this review were to evaluate the clinical and electrophysiological findings of eight obese patients following a weightloss of more than thirty kilograms through diet, bariatric surgery or anorexia nervosa, coming out with peripheral nerves compression signs and symptons. Methods: Seven patients were studied; seven of t...

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Context 1
... was also alteration on antidromic sensory conduction of Superficial Peroneal and Ulnar Nerves. On late F responses, there was absence and/or decreased of responses with prolonged persistence of minimum latency ( Figure 2). On EM, active denervation signs were observed, such as fibrillations and positive waves at rest ( Figure 3) and a partial loss of motor units on muscles dependent from peroneal nerve, from tibialis anterior to distal muscles. ...

Citations

... Peroneal neuropathy is one of the most common form of mononeuropathy in the lower extremities, accounting for approximately 15% of all mononeuropathies in adults [1] . The known causes of damage to the peroneal nerve are trauma, external compression, or traction injuries [2] . In addition, nerve damage caused by tumors or cysts in the course of the peroneal nerve can be considered [3] . ...
... If a patient experiences foot drop symptoms, not only peroneal neuropathy but also sciatic neuropathy, lumbosacral plexopathy, L5 radiculopathy and peripheral polyneuropathy should be included in the list of differential diagnoses [2] . In particular, a deficiency of vitamins (B1, B6, B9, and B12) and minerals can cause peripheral polyneuropathy, and dietary modifications such as supplementation of insufficient nutrients can help recovery. ...
Article
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Background: The causes of peroneal neuropathy are various, but are rarely due to weight loss. Bilateral peroneal neuropathy caused by weight loss after surgery has been reported only after bariatric surgery and there were no reports associated with other abdominal surgery. In this report, we describe a case of the bilateral peroneal neuropathy that occurred due to marked weight loss after biliary surgery. Case summary: A 58-year-old male did not receive adequate nutritional support after biliary surgery, and showed a massive weight loss over a short period of time (body mass index; 24.1 kg/m2 to 20.5 kg/m2 for 24 d). Then, foot drop occurred on both sides. Physical examination, electromyography (EMG) and magnetic resonance imaging studies were conducted and he was diagnosed as bilateral common peroneal neuropathy around the fibular head level. The patient was treated electrical stimulation therapy on both lower legs along with exercise therapy, and received sufficient oral nutritional support. The patient gradually recovered to his original weight, and the power of the dorsiflexor of bilateral ankles improved after conservative treatment. In addition, the follow-up EMG showed signs of improvement. Conclusion: Any abdominal surgery that may have rapid and marked weight loss can lead to peroneal neuropathy as a complication.
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The novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus causing the coronavirus disease 2019 (COVID-19) pandemic is known to lead to the complicated sequelae of severe acute respiratory distress syndrome. Proning has been used as an adjunctive treatment to improve oxygenation in both ventilated and non-ventilated patients. Although patients respond well to this strategy, complications from this arise as well. It is hypothesized that COVID-19 intensive care unit (ICU) proned ventilation is associated with new cases of foot drops or compressive unilateral ankle dorsiflexion weakness during the early 2020 COVID-19 pandemic. Five patients presented to an acute rehabilitation facility with unilateral ankle dorsiflexion weakness after ICU proned ventilation during the COVID-19 pandemic. Three patients were found to have primarily subacute left sensory-motor dysmyelinating common peroneal neuropathies located around the fibular head. Two patients were found to have primarily subacute sensory-motor dysmyelinating right-sided common peroneal neuropathies above the fibular head and distal to biceps femoris muscle. Compressive unilateral common peroneal neuropathies during the pandemic are possibly related to the impromptu, unconventional, and unfamiliar use of proned ventilation.