2026-07-21T14:27:06Zhttps://repisalud.isciii.es/rest/oai/requestoai:repisalud.isciii.es:20.500.12105/95332025-05-27T07:44:40Zcom_20.500.12105_2052com_20.500.12105_2051col_20.500.12105_19614
Repisalud
author
Castellote, Juan Manuel
author
Kofler, Markus
author
Mayr, Andreas
author
Saltuari, Leopold
funder
Instituto de Salud Carlos III
2020-04-13T12:59:10Z
2020-04-13T12:59:10Z
2017
Biomed Res Int. 2017;2017:8471546.
10.1155/2017/8471546
2314-6141
2314-6133
BioMed research international
28299334
http://hdl.handle.net/20.500.12105/9533
Passive limb displacement is routinely used to assess muscle tone. If we attempt to quantify muscle stiffness using mechanical devices, it is important to know whether kinematic stimuli are able to trigger startle reactions. Whether kinematic stimuli are able to elicit a startle reflex and to accelerate prepared voluntary movements (StartReact effect) has not been studied extensively to date. Eleven healthy subjects were suspended in an exoskeleton and were exposed to passive left knee flexion (KF) at three intensities, occasionally replaced by fast right KF. Upon perceiving the movement subjects were asked to perform right wrist extension (WE), assessed by extensor carpi radialis (ECR) electromyographic activity. ECR latencies were shortest in fast trials. Startle responses were present in most fast trials, yet being significantly accelerated and larger with right versus left KF, since the former occurred less frequently and thus less expectedly. Startle responses were associated with earlier and larger ECR responses (StartReact effect), with the largest effect again upon right KF. The results provide evidence that kinematic stimuli are able to elicit both startle reflexes and a StartReact effect, which depend on stimulus intensity and anticipation, as well as on the subjects' preparedness to respond.
eng
Evidence for Startle Effects due to Externally Induced Lower Limb Movements: Implications in Neurorehabilitation
research article
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URL
https://repisalud.isciii.es/bitstreams/2645345c-9690-4071-9110-993469411bda/download
File
MD5
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application/pdf
EvidenceForStartleEffects_2017.pdf
URL
https://repisalud.isciii.es/bitstreams/3bb40846-edef-45a0-ab2b-aafc19ee1068/download
File
MD5
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text/plain
EvidenceForStartleEffects_2017.pdf.txt