Studies of the Normal Human Silent Period

Shahani, Bhagwan T.; Young, Rachel

doi:10.1159/000394170

Cited by 49 publications

(33 citation statements)

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“…This EMGdemonstrated phenomenon is observed following noxious stimuli. A brief pause of voluntary muscle contraction is demonstrated following stimulation of a cutaneous nerve [24]. The scratch collapse yields a similar reflex response.…”

Section: Discussionmentioning

confidence: 91%

Scratch Collapse Test Localizes Osborne's Band as the Point of Maximal Nerve Compression in Cubital Tunnel Syndrome

Brown

Mokhtee

Evangelista

et al. 2009

Hand (New York, N,Y.)

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The objective of this study is to demonstrate the utility of the scratch collapse test (SCT) in localizing the point of maximal compression in cubital tunnel syndrome. From January 1, 2004 to December 1, 2005, 64 adult patients with cubital tunnel syndrome were evaluated by a single surgeon. Cubital tunnel syndrome was diagnosed based upon symptoms of numbness, tingling, and/or pain in the ulnar nerve distribution or by the presence of weakness or wasting of the ulnar-innervated intrinsic hand muscles. All diagnoses were confirmed with electrodiagnostic studies. As part of the physical examination, the SCT was performed along three subdivided segments in the region of the cubital tunnel. Results of the SCT were recorded and correlated with intraoperative findings. Of the 64 patients evaluated, 44 had a positive SCT that was either more profound or solely present a few centimeters distal to the medial epicondyle in the region of Osborne's band. All of these patients subsequently underwent anterior submuscular transposition and were found to have a tight compression point at Osborne's band corresponding to their preoperative SCT. This study suggests that the scratch collapse test may be a reliable physical examination technique for localizing the point of maximal nerve compression in patients with cubital tunnel syndrome. That point, in this series, corresponded with Osborne's band.

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Section: Discussionmentioning

confidence: 91%

Scratch Collapse Test Localizes Osborne's Band as the Point of Maximal Nerve Compression in Cubital Tunnel Syndrome

Brown

Mokhtee

Evangelista

et al. 2009

Hand (New York, N,Y.)

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show abstract

“…A silent period following finger stimulation has been previously described for intrinsic hand muscles during tonic contraction. 15,18 The silent period in the APB muscle was evoked in 4 subjects with single stimulus pulses of an intensity 4-6 × PT. The silent period began approximately 80 ms after the stimulus and lasted for 30-50 ms, in agreement with other studies.…”

Section: Figurementioning

confidence: 99%

Cutaneous withdrawal reflexes of the upper extremity

Floeter¹,

Gerloff²,

Kouri³

et al. 1998

Muscle Nerve

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“…25,44,48 This suppression could be produced either by the activation of polysynaptic circuits that inhibit motoneurons directly or by the interruption of the excitatory inputs that maintain the steady contraction. In animal studies, cutaneous afferents have been shown to converge on a variety of spinal interneurons that inhibit motoneurons, including Renshaw cells, Ib inhibitory interneurons, propriospinal interneurons, and subclasses of interneurons in the flexor reflex circuits.…”

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confidence: 99%