Prepulse inhibition of the blink reflex is abnormal in functional movement disorders
نویسندگان
چکیده
منابع مشابه
Reflex excitability regulates prepulse inhibition.
Presentation of a weak stimulus, a prepulse, before a reflex-evoking stimulus decreases the amplitude of the reflex response relative to reflex amplitude evoked without a preceding prepulse. For example, presenting a brief tone before a trigeminal blink-eliciting stimulus significantly reduces reflex blink amplitude. A common explanation of such data are that sensory processing of the prepulse ...
متن کاملAbnormal beta power is a hallmark of explicit movement control in functional movement disorders
OBJECTIVE To determine whether sensorimotor beta-frequency oscillatory power is raised during motor preparation in patients with functional movement disorders (FMD) and could therefore be a marker of abnormal "body-focused" attention. METHODS We analyzed motor performance and beta-frequency cortical oscillations during a precued choice reaction time (RT) task with varying cue validity (50% or...
متن کاملFacilitation as well as inhibition of the blink reflex by a visual prepulse requires intact striate cortex.
OBJECTIVE The role of visual cortex in modulation of the human eye blink reflex was assessed. METHODS Participants were 13 patients with unilateral striate cortex damage. Nonreflexogenic gratings were presented in their intact or blind hemifield prior to white noise or air puff blink-eliciting stimuli. RESULTS Inhibition of reflex amplitude was observed at asynchronies ranging from about 12...
متن کاملThe human blink reflex.
A detailed study of the human blink reflex in the different parts of the orbicularis oculi muscle has been carried out. The first component of the blink reflex has been demonstrated in patients with Friedreich's ataxia, who have selective loss of large sensory fibres resulting in loss of proprioceptive input. It has been established that both components of the blink reflex are cutaneous reflexe...
متن کاملPrepulse inhibition of the startle blink reflex is modulated during a memory task requiring prepulses to be encoded for later report.
Prepulse inhibition (PPI) of the startle blink reflex in humans can be modulated by selective attention to the prepulse. The present experiment used a memory task to determine whether the encoding of information for later report can modulate PPI. Participants were briefly presented with a display of one or three letters followed by a pattern mask and asked to make a delayed report of the letter...
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ژورنال
عنوان ژورنال: Movement Disorders
سال: 2019
ISSN: 0885-3185,1531-8257
DOI: 10.1002/mds.27706