An exaggerated startle response is one of the core hyperarousal symptoms of posttraumatic stress disorder (PTSD). Heightened startle eye-blink magnitude and reduced habituation of this response in PTSD patients have been reported in several studies. However, it is unclear whether this is an enduring characteristic of individuals vulnerable for PTSD or to which degree trauma-exposed individuals ...

PURPOSE To report dry eye patients' functional visual acuity, which was measured after sustained eye opening for 10-20 seconds, as a simulation of visual function of daily acts of gazing, which is defined as looking at an object with involuntary blink suppression. METHODS Interventional clinical nonrandomized comparative trial. We measured ordinary best-corrected visual acuity and functional ...

Saccadic eye movements are thought to be influenced by blinking through premotor interactions, but it is still unclear how. The present paper describes the properties of blink-associated eye movements and quantifies the effect of reflex blinks on the latencies, metrics, and kinematics of saccades in the monkey. In particular, it is examined to what extent the saccadic system accounts for blink-...

IZAKI A., SHIMO-OKU M. Deparfment of Ophthalmology, Hyogo College of Medicine (Japan) Puroose : Blink reflexes evoked with comeal sensation or flash light stimulation are widely performed to examine optic, trigeminal and facial nerve. Both the electro-oculographic findings of lid movements and scleral search coil findings of eye movements during those blinks were investigated previously, we stu...

Postural and eye-blink reactions to acoustic startle probes were examined in 24 volunteers, who completed two blocked conditions (baseline, startle). A postural reaction during the startle condition demonstrated a reflexive movement in the anterior-posterior direction, which was not observed during the baseline condition. This reflexive response was positively associated with the eye-blink refl...

Eye movements, eye blinks, cardiac signals, muscle noise, and line noise present serious problems for electroencephalographic (EEG) interpretation and analysis when rejecting contaminated EEG segments results in an unacceptable data loss. Many methods have been proposed to remove artifacts from EEG recordings, especially those arising from eye movements and blinks. Often regression in the time ...

Spontaneous eye blink rate was assessed in cynomolgus monkeys treated intramuscularly with the high-efficacy dopamine (DA) agonists, (-)-apomorphine, naxagolide, PD 128,907, 2-(N-phenylethyl-N-propyl)amino-5-hydroxytetralin (+/-)-PPHT, quinpirole, SKF 81297 and SKF 82958; the low-efficacy DA agonists, (-)-3-PPP, roxindole, SDZ 208-912, SKF 75670 and terguride; and the indirect DA agonists, d-am...

We recorded the activity of pontine omnipause neurons (OPNs) in two macaques during saccadic eye movements and blinks. As previously reported, we found that OPNs fire tonically during fixation and pause about 15 ms before a saccadic eye movement. In contrast, for blinks elicited by air puffs, the OPNs paused <2 ms before the onset of the blink. Thus the burst in the agonist orbicularis oculi mo...

Taste stimuli applied to the tongue can elicit facial responses in humans [1] [2]. The authors have previously reported that solutions of the four basic tastes and several commercial confections can also elicit eye-blink responses [3] [4]. Among the eye-blink parameters, the latency of the eye-blinks is particularly important for providing an estimate of the conduction path and the central proc...