![]() Denervation potentials in PT and weakness/denervation of the extensor digitorum (ED) were observed in 2/9 and 4/9 patients, respectively. Nerve conduction studies or electromyography. Cervical radiculopathy is a clinical condition characterized by unilateral arm pain, numbness and tingling in a dermatomal distribution in the hand. In C7 CSR, weakness/denervation of the triceps brachii (TB) and denervation potentials of the flexor carpi radialis (FCR) were observed for all patients. In most cases, other imaging studies such as an MRI or CT scan will be needed to better visualize the spinal cord. For example, electromyography (EMG) can record the electrical impulses of the muscles both at rest and when they contract. Denervation potentials of ECRL were found in 5/8 and 3/5 patients with C5 and C6 CSR, respectively, whereas those of ECRB were found in 1/5, 6/6, and 2/5 patients with C5, C6 and C7 CSR, respectively. ![]() Weakness was not observed for any other muscle in C6 CSR. In C6 CSR, weakness of the wrist extensor and/or denervation of the extensor carpi radialis longus (ECRL)/extensor carpi radialis brevis (ECRB), and those of the pronator teres (PT) were observed for all patients. In C5 CSR, weakness or denervation potentials in EMG, or both, were observed in the deltoid (Del) and infraspinatus (Isp) muscles for all patients, and in the biceps brachii (BB) and brachioradialis (BR) muscles for 9/10 and 8/9 patients, respectively. 3.4 of patients with an EMG diagnosis of a nerve. Enrolled were 25 patients (10 C5, 6 C6, and 9 C7 CSR). EMG for cervical radiculopathy, the Spurlings test was positive in seven, for a sensitivity of 7/20.
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