Silent period abnormalities in carpal tunnel syndrome

Aurora, Sheena K.; Ahmad, B. K.; Aurora, Taruna

doi:10.1002/(sici)1097-4598(199809)21:9<1213::aid-mus16>3.0.co;2-s

Cited by 28 publications

(21 citation statements)

References 13 publications

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“…1 In that report, two patients with severe median neuropathies had absent CSPs, but 17 patients with mild and moderately severe median neuropathies had prolonged CSP durations. Among the parameters of the CSP that we measured, we found that the parameter that was most different between patients and controls was the suppression of EMG activity during the CSP.…”

Section: Discussionsupporting

confidence: 69%

Cutaneous silent periods in patients with Fabry disease

et al. 2000

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Section: Discussionsupporting

confidence: 69%

Cutaneous silent periods in patients with Fabry disease

et al. 2000

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“…The CSP has been assessed in patients with carpal tunnel syndrome (CTS), since many patients report symptoms, such as pain and dysesthesias, that could arise from entrapment of small fibers. Aurora and colleagues studied the CSP in thenar muscles, comparing the CSPs evoked by stimulation of the index finger and the fifth finger 3. In 2 patients with severe CTS, the CSP was absent with stimulation of the index finger, but present with stimulation of the fifth finger.…”

Section: Clinical Utilitymentioning

confidence: 99%

Cutaneous silent periods

Floeter

2003

Muscle and Nerve

119

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The cutaneous silent period (CSP) refers to the brief interruption in voluntary contraction that follows strong electrical stimulation of a cutaneous nerve. The CSP is a protective reflex that is mediated by spinal inhibitory circuits and is reinforced in part by parallel modulation of the motor cortex. This review summarizes current understanding of the afferents and circuits that are responsible for producing CSPs; the utility of the CSP for investigating peripheral and central nervous system disorders; and the relationship between the CSP, other cutaneous reflexes, and peripheral silent periods.

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“…[7][8][9][10] Cutaneous SP is altered in a variety of peripheral nervous system lesions. [11][12][13][14] Absence of radiculopathy, almost normal cutaneous SP has been observed. 18 The CSP technique can quickly determine whether afferent impulses in A-delta fibers pass through individual cervical roots to enter the spinal cord.…”

Section: Introductionmentioning

confidence: 99%

Preserved cutaneous silent period in cervical root avulsion

Vaško

Boček

Mencl

et al. 2015

The Journal of Spinal Cord Medicine

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Objective: Brachial plexus injuries are usually severe and involve the entire brachial plexus, sometimes occurring with root avulsions. Imaging and electrodiagnostic studies are an essential part of the lesion evaluation; however, the results sometimes show a discrepancy. The cutaneous silent period (SP) is a spinal inhibitory reflex mediated by small-diameter A-delta nociceptive fibers. The aim of the study was to determine if cutaneous SP testing may serve as a useful aid in evaluation of brachial plexus injury and/or in the diagnosis of root avulsion. Methods: In 19 patients with traumatic brachial plexus injury (15 males, age 18-62 years) we performed a clinical examination, CT myelography and neurophysiological testing. A needle EMG was obtained from muscles supplied by C5-T1 myotomes. Cutaneous SP was recorded after painful stimuli were delivered to the thumb (C6 dermatome), middle (C7) and little (C8) fingers while subjects maintained voluntary contraction of intrinsic hand muscles. Results: Electrodiagnostic and imaging studies confirmed root avulsion (partial or total) maximally involving C5, C6 roots in 12 patients, whereas only in 4 of them the cutaneous SP was partially absent. In the remaining subjects, the cutaneous SP was preserved. Conclusion: In brachial plexopathy even with plurisegmental root avulsion, the cutaneous SP was mostly preserved. This method cannot be recommended as a reliable test for diagnosis of single root avulsion; however, it can provide a quick physiological confirmation of functional afferent A-delta fibers through damaged roots and/or trunks. The clinicians may add this test to the diagnosis of spinal cord dysfunction.

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Silent period abnormalities in carpal tunnel syndrome

Cited by 28 publications

References 13 publications

Cutaneous silent periods in patients with Fabry disease

Cutaneous silent periods in patients with Fabry disease

Cutaneous silent periods

Preserved cutaneous silent period in cervical root avulsion

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