keyword
MENU ▼
Read by QxMD icon Read
search

Ocular movement

keyword
https://www.readbyqxmd.com/read/28733210/threat-effects-on-human-oculo-motor-function
#1
E N Naranjo, T W Cleworth, J H J Allum, J T Inglis, J Lea, B D Westerberg, M G Carpenter
Neuro-anatomical evidence supports the potential for threat-related factors, such as fear, anxiety and vigilance, to influence brainstem motor nuclei controlling eye movements, as well as the vestibular nuclei. However, little is known about how threat influences human ocular responses, such as eye saccades (ES), smooth pursuit eye tracking (SP), and optokinetic nystagmus (OKN), and whether these responses can be facilitated above normal baseline levels with a natural source of threat. This study was designed to examine the effects of height-induced postural threat on the gain of ES, SP and OKN responses in humans...
July 18, 2017: Neuroscience
https://www.readbyqxmd.com/read/28727554/a-human-humanoid-interaction-through-the-use-of-bci-for-locked-in-als-patients-using-neuro-biological-feedback-fusion
#2
Rosario Sorbello, Salvatore Tramonte, Marcello Giardina, Vincenzo La Bella, Rossella Spataro, Brendan Allison, Christoph Guger, Antonio Chella
This paper illustrates a new architecture for a human-humanoid interaction based on EEG-Brain Computer Interface (EEG-BCI) for patients affected by locked-in syndrome caused by Amyotrophic Lateral Sclerosis (ALS). The proposed architecture is able to recognise users' mental state accordingly to the biofeedback factor Bf , based on users' Attention, Intention and Focus, that is used to elicit a robot to perform customised behaviours. Experiments have been conducted with a population of 8 subjects: 4 ALS patients in a near Locked-in status with normal ocular movement and 4 healthy control subjects enrolled for age, education and computer expertise...
July 18, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28724824/late-onset-descemet-s-membrane-detachment-20-years-after-penetrating-keratoplasty
#3
Sharon D'Souza, Narpat Solanki, K R Sushma, Priyank Solanki
This paper reports a case of spontaneous Descemet's Membrane (DM ) detachment 20-years after penetrating keratoplasty (PK). The patient presented with acute onset blurred vision in the right eye associated with mild ocular discomfort. There was no prior history of trauma. The patient had undergone PK in the right eye 20 years back. Detailed ophthalmic examination showed best corrected visual acuity of hand movements close to face in the right eye and 20/80 in the left eye. The right eye showed diffuse graft edema but no congestion, epithelial defect, or loss of continuity of graft-host junction to suggest a traumatic etiology...
July 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28716764/influence-of-time-and-direction-information-on-video-head-impulse-gains
#4
Oğuz Yılmaz, Ersoy Öz, Serkan Kurt, Öyküm Esra Aşkın, Elifnur Taşdemir, Berna Özge Mutlu, Ahmet Keleş, Raşit Cevizci
OBJECTIVE: The objective of this study was to establish which factor leads to a higher vestibulo-ocular reflex (VOR) gain: the timing of the movement or the direction of the movement. For this purpose, healthy volunteers were examined under three conditions: (1) when they were informed about the timing of the head movement; (2) when they were informed about the direction of the head movement; and (3) when they knew both the timing and the direction of the head movement. MATERIALS AND METHODS: This study included data from 19 participants between the ages of 20 and 23 years with no neurological or vestibular ailments...
July 17, 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28706880/a-novel-method-for-the-management-of-anophthalmic-socket
#5
Srinivasa B Rao, Savita Akki, Deepak Kumar, Sunil Kumar Mishra
An orbital defect causes severe facial asymmetry and disfigurement that result in an immense emotional trauma to the patient and is also associated with economic, esthetic, and psychological problems. A prosthetic replacement is the treatment of choice in helping individual to return to his normal life by producing an acceptable and lifelike appearance. This case report describes the critical areas of fabrication of ocular prosthesis for a patient with missing right eye due to trauma to eye ball in an accident...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28705835/transendothelial-movement-of-adiponectin-is-restricted-by-glucocorticoids
#6
Thanh Q Dang, Nanyoung Yoon, Helen Chasiotis, Emily C Dunford, Qilong Feng, Pingnian He, Michael C Riddell, Scott P Kelly, Gary Sweeney
Altered permeability of the endothelial barrier in a variety of tissues has implications both in disease pathogenesis and treatment. Glucocorticoids are potent mediators of endothelial permeability, and this forms the basis for their heavily prescribed use as medications to treat ocular disease. However, the effect of glucocorticoids on endothelial barriers elsewhere in the body is less well studied. Here, we investigated glucocorticoid-mediated changes in endothelial flux of Adiponectin (Ad), a hormone with a critical role in diabetes...
August 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28698242/abnormal-fixational-eye-movements-in-strabismus
#7
Fatema F Ghasia, Jorge Otero-Millan, Aasef G Shaikh
INTRODUCTION: Fixational saccades are miniature eye movements that constantly change the gaze during attempted visual fixation. Visually guided saccades and fixational saccades represent an oculomotor continuum and are produced by common neural machinery. Patients with strabismus have disconjugate binocular horizontal saccades. We examined the stability and variability of eye position during fixation in patients with strabismus and correlated the severity of fixational instability with strabismus angle and binocular vision...
July 11, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28689341/painful-spasms-in-facial-masticatory-and-motor-ocular-muscles-reversed-after-microvascular-decompression-of-a-neurovascular-conflict-at-brainstem
#8
Tania-Mihaela Idriceanu, Marc Sindou
The authors present a case of a 42-year-old female admitted for disabling complex and atypical bilateral facial spasms associated with painful masticatory and motor ocular dystonic movements, difficult to fit in the definition of any known cranio-facial dyskinesias. MRI showed a left PICA loop invaginated into the brainstem, considered responsible of an hyperactive disorder of the brainstem nuclei neighboring the conflict. After microvascular decompression, the patient made a full recovery with complete disappearance of the paroxystic phenomena...
July 8, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28666511/unilateral-external-ophthalmoplegia-arare-presentation-of-myasthenia-gravis
#9
Muhammad Saim Khan, Asad Habib, Imran Basit
Myasthenia gravis (MG) is a disease of autoimmunity with variable and diverse clinical presentations. The target tissue is neuromuscular junction of skeletal muscles, where efficient nerve impulse transmission is hampered leading to less effective muscle contraction. Patients of MG usually present with bilateral ptosis, diplopia and fatigability, which may or may not coexist with generalised weakness, dysphagia and dysarthria. A46-year male presented with unilateral ptosis and diplopia. Except for unilateral moderate ptosis and restriction of extraocular movements, ocular and systemic examination was normal...
November 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28661429/effective-suckling-c57bl-6-kunming-and-balb-c-mouse-models-with-remarkable-neurological-manifestation-for-zika-virus-infection
#10
Jianhai Yu, Xuling Liu, Changwen Ke, Qinghua Wu, Weizhi Lu, Zhiran Qin, Xiaoen He, Yujing Liu, Jieli Deng, Suiqi Xu, Ying Li, Li Zhu, Chengsong Wan, Qiwei Zhang, Weiwei Xiao, Qian Xie, Bao Zhang, Wei Zhao
Since 2015, 84 countries and territories reported evidence of vector-borne Zika Virus (ZIKV) transmission. The World Health Organization (WHO) declared that ZIKV and associated consequences especially the neurological autoimmune disorder Guillain-Barré syndrome (GBS) and microcephaly will remain a significant enduring public health challenge requiring intense action. We apply a standardization of the multi-subcutaneous dorsal inoculation method to systematically summarize clinical neurological manifestation, viral distribution, and tissue damage during the progress of viremia and systemic spread in suckling mouse models...
June 29, 2017: Viruses
https://www.readbyqxmd.com/read/28656674/saccades-and-fixations-in-children-with-delayed-reading-skills
#11
Valldeflors Vinuela-Navarro, Jonathan T Erichsen, Cathy Williams, J Margaret Woodhouse
PURPOSE: Previous studies have reported that eye movements differ between good/average and poor readers. However, these studies have been limited to investigating eye movements during reading related tasks, and thus, the differences found could arise from deficits in higher cognitive processes involved in reading rather than oculomotor performance. The purpose of the study is to determine the extent to which eye movements in children with delayed reading skills are different to those obtained from children with good/average reading skills in non-reading related tasks...
July 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/28656650/effects-of-signal-artefacts-on-electroencephalography-spectral-power-during-sleep-quantifying-the-effectiveness-of-automated-artefact-rejection-algorithms
#12
Jianbo Liu, Sridhar Ramakrishnan, Srinivas Laxminarayan, Maxwell Neal, David J Cashmere, Anne Germain, Jaques Reifman
Electroencephalography (EEG) recordings during sleep are often contaminated by muscle and ocular artefacts, which can affect the results of spectral power analyses significantly. However, the extent to which these artefacts affect EEG spectral power across different sleep states has not been quantified explicitly. Consequently, the effectiveness of automated artefact-rejection algorithms in minimizing these effects has not been characterized fully. To address these issues, we analysed standard 10-channel EEG recordings from 20 subjects during one night of sleep...
June 28, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28649640/mri-derived-diffusion-parameters-in-the-human-optic-nerve-and-its-surrounding-sheath-during-head-down-tilt
#13
Darius A Gerlach, Karina Marshall-Goebel, Khader M Hasan, Larry A Kramer, Noam Alperin, Joern Rittweger
More than half of astronauts present with significant neuro-ophthalmic findings during 6-month missions onboard the International Space Station. Although the underlying cause of this Microgravity Ocular Syndrome is currently unknown, alterations in cerebrospinal fluid dynamics within the optic nerve sheath may play a role. In the presented study, diffusion tensor imaging was used to assess changes in diffusivity of the optic nerve and its surrounding sheath during head-down tilt, a ground-based model of microgravity...
2017: NPJ Microgravity
https://www.readbyqxmd.com/read/28649224/the-video-head-impulse-test
#14
REVIEW
G M Halmagyi, Luke Chen, Hamish G MacDougall, Konrad P Weber, Leigh A McGarvie, Ian S Curthoys
In 1988, we introduced impulsive testing of semicircular canal (SCC) function measured with scleral search coils and showed that it could accurately and reliably detect impaired function even of a single lateral canal. Later we showed that it was also possible to test individual vertical canal function in peripheral and also in central vestibular disorders and proposed a physiological mechanism for why this might be so. For the next 20 years, between 1988 and 2008, impulsive testing of individual SCC function could only be accurately done by a few aficionados with the time and money to support scleral search-coil systems-an expensive, complicated and cumbersome, semi-invasive technique that never made the transition from the research lab to the dizzy clinic...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28648105/abnormal-distribution-of-aqp4-in-minor-salivary-glands-of-primary-sj%C3%A3-gren-s-syndrome-patients
#15
Margherita Sisto, Loredana Lorusso, Giuseppe Ingravallo, Beatrice Nico, Domenico Ribatti, Simona Ruggieri, Dario Domenico Lofrumento, Sabrina Lisi
A decreased saliva production occurs in primary Sjögren's syndrome (pSS), an autoimmune disease characterized by oral and ocular dryness due to dysfunction of the lacrimal and salivary glands (SGs). Since water movement is involved in saliva secretion, the expression, localization, and function of the water channels aquaporins (AQPs) have been extensively studied in SGs. To date, the presence of AQP4 remains controversial and ambiguous in human SGs. We investigated by immunohistochemistry, high-resolution confocal microscopy and quantitative image analysis, Western blot and real-time RT-PCR, the presence of the AQP4 gene, and the distribution of AQP4 protein in healthy controls and pSS SG biopsies...
June 24, 2017: Autoimmunity
https://www.readbyqxmd.com/read/28646240/delineating-function-and-connectivity-of-optokinetic-hubs-in-the-cerebellum-and-the-brainstem
#16
Ria Maxine Ruehl, Carolin Hinkel, Thomas Bauermann, Peter Zu Eulenburg
Optokinetic eye movements are crucial for keeping a stable image on the retina during movements of the head. These eye movements can be differentiated into a cortically generated response (optokinetic look nystagmus) and the highly reflexive optokinetic stare nystagmus, which is controlled by circuits in the brainstem and cerebellum. The contributions of these infratentorial networks and their functional connectivity with the cortical eye fields are still poorly understood in humans. To map ocular motor centres in the cerebellum and brainstem, we studied stare nystagmus using small-field optokinetic stimuli in the horizontal and vertical directions in 22 healthy subjects...
June 23, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28630792/corneal-collagen-crosslinking-treatment-in-a-case-with-pneumococcal-keratitis
#17
Ayşe Bozkurt Oflaz, Banu Bozkurt, Ümit Kamış, Bengü Ekinci Köktekir
Bacterial keratitis is a serious ocular infectious disease that can threaten vision. The disease generally progresses rapidly and can lead to corneal scar, stromal abscess formation, perforation, and dissemination to adjacent tissues if not treated properly. Recent studies showed that corneal collagen crosslinking (CCC) using ultraviolet-A/riboflavin is effective in the treatment of bacterial keratitis refractory to topical antibiotic treatment. In addition to being bactericidal, CCC also decreases risk of perforation by strengthening the corneal collagen structure...
June 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28623544/clinical-feature-and-waveform-in-infantile-nystagmus-syndrome-in-children-with-frmd7-gene-mutations
#18
Dayong Bai, Wei Shi, Zhan Qi, Wei Li, Aihua Wei, Yanhui Cui, Cheng Li, Li Li
Infant nystagmus sydrome presents as involuntary eye movement disorder and can affect seriously ocular function. We performed a retrospective study of clinical data and FRMD7 genetic test results in 12 cases of infantile nystagmus syndrome to correlate waveform, stereopsis, and visual acuity. The patients (age 6.40±2.67 years) had FRMD7 mutations as follows: missense in eight cases, shear in two cases, frameshift in one case, and non-frameshift in one case. Horizontal jerk waveform was observed in six cases, versus horizontal pendulum in five cases and dual jerk in one case...
June 14, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28622488/dizziness-unsteadiness-visual-disturbances-and-sensorimotor-control-in-traumatic-neck-pain
#19
Julia Treleaven
Synopsis There is considerable evidence to support the importance of cervical afferent dysfunction in the development of dizziness, unsteadiness, visual disturbances, altered balance, and altered eye and head movement control following neck trauma, especially in those with persistent symptoms. However, there are other possible causes for these symptoms, and secondary adaptive changes should also be considered in differential diagnosis. Understanding the nature of these symptoms and differential diagnosis of their potential origin is important for rehabilitation...
July 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28622442/muscular-basis-of-whisker-torsion-in-mice-and-rats
#20
Sebastian Haidarliu, Knarik Bagdasarian, Namrata Shinde, Ehud Ahissar
Whisking mammals move their whiskers in the rostrocaudal and dorsoventral directions with simultaneous rolling about their long axes (torsion). Whereas muscular control of the first two types of whisker movement was already established, the anatomic muscular substrate of the whisker torsion remains unclear. Specifically, it was not clear whether torsion is induced by asymmetrical operation of known muscles or by other largely unknown muscles. Here, we report that mystacial pads of newborn and adult rats and mice contain oblique intrinsic muscles (OMs) that connect diagonally adjacent vibrissa follicles...
June 16, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
keyword
keyword
107801
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"