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Distal Conduction Blocks
Published in Bernard J. Dalens, Jean-Pierre Monnet, Yves Harmand, Pediatric Regional Anesthesia, 2019
Bernard J. Dalens, Jean-Pierre Monnet, Yves Harmand
The deep peroneal nerve divides medially, in front of the ankle joint, and gives rise to (see Figure 2.64C and D): A lateral branch supplying the extensor digitorum brevis muscle and the tarsal and metatarsophalangeal joints of the second to fourth toesA medial branch, lateral to the dorsal artery of the foot, which supplies the first and second toes
The neurological examination
Published in Michael Y. Wang, Andrea L. Strayer, Odette A. Harris, Cathy M. Rosenberg, Praveen V. Mummaneni, Handbook of Neurosurgery, Neurology, and Spinal Medicine for Nurses and Advanced Practice Health Professionals, 2017
Extensor digitorum brevis muscle (Figure 11.2i) Innervation: Deep peroneal nerve (L5 and S1).Function: Extension of metatarsophalangeal joints of the second through fifth toes.Physical examination: The patient tries to dorsiflex the proximal phalanges of the toes against resistance.
Compression Neuropathies
Published in Gary W. Jay, Practical Guide to Chronic Pain Syndromes, 2016
This entrapment has also been described as “the anterior tarsal tunnel syndrome.” It may be caused by shoe pressure, compression at the inferior extensor retinaculum, traction, edema, exostoses, or trauma. The main symptoms comprise paresthesia or dysesthesia of the web space between the first and second toe. EMG studies may reveal signs of denervation of the extensor digitorum brevis muscle. The treatment may be conservative and preventive, such as wearing appropriate shoes to relieve the pressure. It may also consist of anesthetic/steroid injections. If those measures fail, surgical release from the compressive pressure may be necessary (45).
Bilateral peroneal nerve palsy secondary to prolonged sitting in an adolescent patient
Published in International Journal of Neuroscience, 2022
Şükran Güzel, Selin Ozen, Sacide Nur Coşar
Motor and sensory nerve conduction studies of the median, ulnar, tibial and sural nerves were normal. F-wave responses of bilateral tibial and common peroneal nerves were also within the normal range. Recordings over the bilateral extensor digitorum brevis muscles revealed low-amplitude peroneal responses compatible with conduction block between the fibular head and knee (Table 1). Needle electromyography revealed fibrillation potentials and positive sharp waves with reduced motor unit action potential recruitment in the peroneal-innervated muscles, including the tibialis anterior and peroneal longus (Table 2). There was no electrophysiological evidence of peripheral polyneuropathy or lumbar radiculopathy. The electrophysiological findings were compatible with bilateral common peroneal mononeuropathy across the fibular head.
Electrophysiological characteristics of patients with nitrous oxide abuse
Published in Neurological Research, 2021
Yan Li, Xiuchun Zhang, Chuansheng Zhao
All electrophysiological examinations were performed by an experienced neurophysiologist using an electromyograph (MEB-9200 K, Nihon Kohden Corporation, Tokyo, Japan) following the standard protocols [21]. Limb temperature was kept above 32 °C. The CMAPs of motor nerves were evoked from the median nerve (stimulating at the wrist and elbow; recording at the abductor pollicis brevis muscle), the ulnar nerve (stimulating at the wrist, below the elbow, and above the elbow; recording at the abductor digitus minimi muscle), the fibular nerve (stimulating at the ankle and below the fibular head; recording at the extensor digitorum brevis muscle), and the tibial nerve (stimulating at the ankle and the popliteal fossa; recording at the abductor hallucis muscle). The orthodromic conduction of sensory nerves was measured from the median nerve (stimulating at the digitus medius and palmar muscles; recording at the wrist), the ulnar nerve (stimulating at the little finger; recording at the wrist), and the sural nerve (stimulating at the lateral malleolus; recording at 11 cm proximal to the calf). The reference ranges used in our lab were shown in the supplementary material (Table S1-S5).
Average urinary flow rate and its association with handgrip strength
Published in The Aging Male, 2020
Hao-Tse Chiu, Tung-Wei Kao, Tao-Chun Peng, Yuan-Yuei Chen, Wei-Liang Chen
Besides, the decline of muscle fiber may be related to apoptosis which neuron degeneration and even loss would be revealed [32]. It is suggested that not only detrusor smooth muscle but skeletal muscle had a similar neuromuscular change in aging. The study [33] showed the people with muscle wasting and weakness had decreased functioning motor units and slowly impulse conduction in distal regions of axons of their extensor digitorum brevis muscles. Relative search [34,35] showed the older people had reduced skeletal muscle fibers and contractility than the younger group. Recently, many articles took the strength of handgrip as a predictor of the strength of muscle due to its suitable and convenience [36,37]. Therefore, we believed that aging-related low muscle strength is extensive, including smooth muscle and skeletal muscle. The inference was reasonable according to the result of our study that lower UFR had a significant association with lower HGS.