keyword
MENU ▼
Read by QxMD icon Read
search

Oculomotor

keyword
https://www.readbyqxmd.com/read/28640793/intraoperative-computed-tomography-ct-for-treating-giant-carotid-intracavernous-aneurysms
#1
Zhe Xue, Fuyu Wang, Zhenghui Sun, Hui Zhang, Chen Wu, Dongsheng Kong, Bainan Xu
BACKGROUND Giant carotid intracavernous aneurysm refers to those lesions larger than 2.5 cm and derived from a cavernous segment, accounting for about 30% of all intracranial tumors. Dynamic CT perfusion imaging (PCT) is a common method recently employed to evaluate cerebral perfusion. This study investigated the efficacy and clinical application of intraoperative CT in the surgery for giant symptomatic carotid intracavernous aneurysm. MATERIAL AND METHODS A retrospective analysis was performed on 23 cases with giant symptomatic carotid intracavernous aneurysm...
June 22, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28626444/aging-with-cerebral-small-vessel-disease-and-dizziness-the-importance-of-undiagnosed-peripheral-vestibular-disorders
#2
Niccolò Cerchiai, Michelangelo Mancuso, Elena Navari, Nicola Giannini, Augusto Pietro Casani
Recent studies showed a link between cerebral small vessel white matter disease (SVD) and dizziness: patients whose dizziness cannot be explained by vestibular disease show severe SVD and gait abnormalities; however, little is still known about how SVD can cause this symptom. The primary aim of this study is to examine the possible underlying causes of dizziness in neurovascular patients; this is in order to assess whether treatable causes could be routinely disregarded. A secondary aim is to possibly define a central oculomotor pattern induced per se by SVD...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28612679/influence-of-social-presence-on-eye-movements-in-visual-search-tasks
#3
Na Liu, Ruifeng Yu
This study employed an eye-tracking technique to investigate the influence of social presence on eye movements in visual search tasks. A total of 20 male subjects performed visual search tasks in a 2 (target presence: present vs. absent) × 2 (task complexity: complex vs. simple) × 2 (social presence: alone vs. a human audience) within-subject experiment. Results indicated that the presence of an audience could evoke a social facilitation effect on response time in visual search tasks. Compared with working alone, the participants made fewer and shorter fixations, larger saccades and shorter scan path in simple search tasks and more and longer fixations, smaller saccades and longer scan path in complex search tasks when working with an audience...
June 14, 2017: Ergonomics
https://www.readbyqxmd.com/read/28605513/a-quadrantic-bias-in-prefrontal-representation-of-visual-mnemonic-space
#4
Matthew L Leavitt, Florian Pieper, Adam J Sachs, Julio C Martinez-Trujillo
Single neurons in primate dorsolateral prefrontal cortex (dLPFC) are known to encode working memory (WM) representations of visual space. Psychophysical studies have shown that the horizontal and vertical meridians of the visual field can bias spatial information maintained in WM. However, most studies and models have tacitly assumed that dLPFC neurons represent mnemonic space homogenously. The anatomical organization of these representations has also eluded clear parametric description. We investigated these issues by recording from neuronal ensembles in macaque dLPFC with microelectrode arrays while subjects performed an oculomotor delayed-response task...
June 9, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28604212/joubert-syndrome
#5
Doreen Crawford, Annette Dearmun
Named after the French doctor who first described this rare neurological condition, Joubert syndrome is characterised by developmental delay, hypotonia, ataxia and oculomotor apraxia.
June 12, 2017: Nursing Children and Young People
https://www.readbyqxmd.com/read/28602497/anatomical-localization-of-the-cavernous-sinus-dural-fistula-by-3d-rotational-angiography-with-emphasis-on-clinical-and-therapeutic-implications
#6
Santhosh Kumar Kannath, Jayadevan Enakshy Rajan, Sankara P Sarma
BACKGROUND AND PURPOSE: Carotid cavernous sinus dural arteriovenous fistulas (CSDAVFs) are presumed to be located within the walls of the cavernous sinus, however the exact fistulous site has not yet been studied by angiographic or anatomical methods. The present study aimed to localize CSDAVFs with the help of 3D rotational angiography (RA) and correlated the observations with clinical and angiographic findings. MATERIALS AND METHODS: The CSDAVFs were categorized as dural, extradural or osseous based on the site of convergence of feeders into the venous sac...
June 8, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28601961/basal-ganglia-movement-disorders-and-deep-brain-stimulation-advances-made-through-non-human-primate-research
#7
REVIEW
Thomas Wichmann, Hagai Bergman, Mahlon R DeLong
Studies in non-human primates (NHPs) have led to major advances in our understanding of the function of the basal ganglia and of the pathophysiologic mechanisms of hypokinetic movement disorders such as Parkinson's disease and hyperkinetic disorders such as chorea and dystonia. Since the brains of NHPs are anatomically very close to those of humans, disease states and the effects of medical and surgical approaches, such as deep brain stimulation (DBS), can be more faithfully modeled in NHPs than in other species...
June 10, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28601293/from-dizziness-to-severe-ataxia-and-dysarthria-new-cases-of-anti-ca-arhgap26-autoantibody-associated-cerebellar-ataxia-suggest-a-broad-clinical-spectrum
#8
Ulrike Wallwitz, Sebastian Brock, Antje Schunck, Brigitte Wildemann, Sven Jarius, Frank Hoffmann
In 2010, a novel anti-neuronal autoantibody, termed anti-Ca, was described in a patient with subacute cerebellar ataxia, and Rho GTPase-activating protein 26 (ARHGAP26) was identified as the target antigen. Recently, three additional cases of anti-Ca-positive cerebellar ataxia have been published. In addition to ataxia, cognitive decline and depression have been observed in some patients. Here, we report two new cases of anti-Ca-associated autoimmune cerebellar ataxia. Patient 1 presented with dizziness and acute yet mild limb and gait ataxia...
August 15, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28597701/upper-limb-and-eye-movement-coordination-during-reaching-tasks-in-people-with-stroke
#9
Katie L Meadmore, Timothy A Exell, Jane H Burridge, Ann-Marie Hughes, Christopher T Freeman, Valerie Benson
PURPOSE: To enhance understanding of the relationship between upper limb and eye movements during reaching tasks in people with stroke. METHODS: Eye movements were recorded from 10 control participants and 8 chronic stroke participants during a visual orienting task (Experiment 1) and a series of reaching tasks (Experiment 2). Stroke participants completed the reaching tasks using (i) their less impaired upper limb, (ii) their more impaired upper limb without support, and (iii) their more impaired upper limb, with support (SaeboMAS gravitational support and/or electrical stimulation)...
June 9, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28592198/reversible-drug-induced-antiphospholipid-syndrome
#10
J Risse, M Vieira, F Beuret, N Petitpain, S Zuily, D Wahl
We report an original case of reversible antiphospholipid syndrome (APS) due to minocycline in a young male patient who experienced recurrent strokes while taking minocycline. He started minocycline therapy (50 mg twice daily) at 15 years old for acne. After three years of treatment, the patient experienced a lateral medullary syndrome. He was treated with aspirin while minocycline was continued. Eighteen months later, the patient complained about horizontal binocular diplopia. MRI revealed an infarct of the oculomotor nerve nucleus...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28586933/a-case-of-pituitary-carcinoma-initially-diagnosed-as-an-ectopic-growth-hormone-producing-pituitary-adenoma-with-a-high-ki-67-labeling-index
#11
Toshiki Endo, Yoshikazu Ogawa, Mika Watanabe, Teiji Tominaga
We report a case of a 66-year-old woman with a malignant transformation of a growth hormone (GH)-producing pituitary adenoma that was mainly located in the clivus. The patient originally presented with left oculomotor and abducens nerve palsies. Magnetic resonance imaging revealed a clival tumor separated from the normal pituitary gland, and the patient subsequently underwent transsphenoidal surgery. Analysis of the resected clival tissue revealed proliferation of tumor cells with slightly irregular nuclei but no mitosis...
June 6, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28584095/sensorimotor-integration-on-a-rapid-time-scale
#12
Jinhong Luo, Ninad B Kothari, Cynthia F Moss
Sensing is fundamental to the control of movement: From grasping objects to speech production, sensing guides action. So far, most of our knowledge about sensorimotor integration comes from visually guided reaching and oculomotor integration, in which the time course and trajectories of movements can be measured at a high temporal resolution. By contrast, production of vocalizations by humans and animals involves complex and variable actions, and each syllable often lasts a few hundreds of milliseconds, making it difficult to infer underlying neural processes...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28579056/-computerized-oculomotor-training-in-dyslexia-a-randomized-crossover-clinical-trial-in-pediatric-population
#13
H Peyre, C-L Gérard, I Dupong Vanderhorst, S Larger, C Lemoussu, J Vesta, E Bui Quoc, N Gouleme, R Delorme, M P Bucci
OBJECTIVE: Several studies have reported abnormal oculomotor capacities leading to reading/writing difficulties among dyslexic children. However, no randomized clinical trial has been conducted to determine whether oculomotor training improves reading/writing skills of these children. The present study aims to evaluate the efficacy of computer-based oculomotor training among dyslexic children. METHOD: Crossover randomized trial with enrollment from January 12, 2015 to July 24, 2015, and follow-up to February 4, 2016...
June 1, 2017: L'Encéphale
https://www.readbyqxmd.com/read/28575309/nonhuman-primate-studies-to-advance-vision-science-and-prevent-blindness
#14
Michael J Mustari
Most primate behavior is dependent on high acuity vision. Optimal visual performance in primates depends heavily upon frontally placed eyes, retinal specializations, and binocular vision. To see an object clearly its image must be placed on or near the fovea of each eye. The oculomotor system is responsible for maintaining precise eye alignment during fixation and generating eye movements to track moving targets. The visual system of nonhuman primates has a similar anatomical organization and functional capability to that of humans...
May 31, 2017: ILAR Journal
https://www.readbyqxmd.com/read/28575030/method-to-assess-the-temporal-persistence-of-potential-biometric-features-application-to-oculomotor-gait-face-and-brain-structure-databases
#15
Lee Friedman, Mark S Nixon, Oleg V Komogortsev
We introduce the intraclass correlation coefficient (ICC) to the biometric community as an index of the temporal persistence, or stability, of a single biometric feature. It requires, as input, a feature on an interval or ratio scale, and which is reasonably normally distributed, and it can only be calculated if each subject is tested on 2 or more occasions. For a biometric system, with multiple features available for selection, the ICC can be used to measure the relative stability of each feature. We show, for 14 distinct data sets (1 synthetic, 8 eye-movement-related, 2 gait-related, and 2 face-recognition-related, and one brain-structure-related), that selecting the most stable features, based on the ICC, resulted in the best biometric performance generally...
2017: PloS One
https://www.readbyqxmd.com/read/28570669/extraocular-motoneurons-of-the-adult-rat-show-higher-levels-of-vascular-endothelial-growth-factor-and-its-receptor-flk-1-than-other-cranial-motoneurons
#16
Silvia Silva-Hucha, Rosendo G Hernández, Beatriz Benítez-Temiño, Ángel M Pastor, Rosa R de la Cruz, Sara Morcuende
Recent studies show a relationship between the deficit of vascular endothelial growth factor (VEGF) and motoneuronal degeneration, such as that occurring in amyotrophic lateral sclerosis (ALS). VEGF delivery protects motoneurons from cell death and delayed neurodegeneration in animal models of ALS. Strikingly, extraocular motoneurons show lesser vulnerability to neurodegeneration in ALS compared to other cranial or spinal motoneurons. Therefore, the present study investigates possible differences in VEGF and its main receptor VEGFR-2 or Flk-1 between extraocular and non-extraocular brainstem motoneurons...
2017: PloS One
https://www.readbyqxmd.com/read/28566184/unexpectedly-mild-phenotype-in-an-ataxic-family-with-a-two-base-deletion-in-the-aptx-gene
#17
Makito Hirano, Ryusuke Matsumura, Yusaku Nakamura, Kazumasa Saigoh, Hikaru Sakamoto, Shuichi Ueno, Hiroya Inoue, Susumu Kusunoki
INTRODUCTION: Early onset ataxia with ocular motor apraxia and hypoalbuminemia (EAOH)/ataxia with oculomotor apraxia 1 (AOA1) is an autosomal recessive disorder caused by mutations in the APTX gene. In contrast to the recent progress on the molecular mechanism of aprataxin in DNA repair, the genotype and phenotype correlation has not been fully established. A previous study demonstrated that patients with truncation mutations had earlier onset of disease than those with missense mutations METHODS: Genomic DNA analysis was performed in a consanguineous family with relatively late-onset EAOH/AOA1...
July 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28553221/tumors-presenting-as-multiple-cranial-nerve-palsies
#18
Kishore Kumar, Rafeeq Ahmed, Bharat Bajantri, Amandeep Singh, Hafsa Abbas, Eddy Dejesus, Rana Raheel Khan, Masooma Niazi, Sridhar Chilimuri
Cranial nerve palsy could be one of the presenting features of underlying benign or malignant tumors of the head and neck. The tumor can involve the cranial nerves by local compression, direct infiltration or by paraneoplastic process. Cranial nerve involvement depends on the anatomical course of the cranial nerve and the site of the tumor. Patients may present with single or multiple cranial nerve palsies. Multiple cranial nerve involvement could be sequential or discrete, unilateral or bilateral, painless or painful...
January 2017: Case Reports in Neurology
https://www.readbyqxmd.com/read/28552035/novel-pnkp-mutation-in-siblings-with-ataxia-oculomotor-apraxia-type-4
#19
Nicoline Schiess, David S Zee, Khurram A Siddiqui, Miklos Szolics, Ayman W El-Hattab
The phenotypic and genetic spectrum of ataxia with oculomotor apraxia (AOA) disorders is rapidly evolving and new technologies such as genetic mapping using whole exome sequencing reveal subtle distinctions among the various subtypes. We report a novel PNKP mutation in two siblings with progressive ataxia, abnormal saccades, sensorimotor neuropathy and dystonia consistent with the AOA type 4 phenotype. Laboratory evaluation revealed hypoalbuminemia, hypercholesterolemia with elevated LDL, elevated IgE levels and normal α fetoprotein levels...
March 2017: Journal of Neurogenetics
https://www.readbyqxmd.com/read/28549352/eye-abduction-reduces-but-does-not-eliminate-competition-in-the-oculomotor-system
#20
Paul J Boon, Jan Theeuwes, Artem V Belopolsky
Although it is well established that there is a tight coupling between covert attention and the eye movement system there is an ongoing controversy whether this relationship is functional. Previous studies demonstrated that disrupting the ability to execute an eye movement interferes with the allocation of covert attention. One technique that prevents the execution of an eye movement involves the abduction of the eye in the orbit while presenting the stimuli outside of the effective oculomotor range (Craighero, Nascimben, & Fadiga, 2004)...
May 1, 2017: Journal of Vision
keyword
keyword
44638
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"