keyword
MENU ▼
Read by QxMD icon Read
search

Oculomotor

keyword
https://www.readbyqxmd.com/read/27923188/electrophysiology-in-fisher-syndrome
#1
REVIEW
Satoshi Kuwabara, Yukari Sekiguchi, Sonoko Misawa
Fisher syndrome (FS), a variant of Guillain-Barré syndrome (GBS), is characterized by the clinical triad of ophthalmoplegia, ataxia, and areflexia. The lesion sites for these unique clinical features include the oculomotor nerves and group 1a neurons in the dorsal root ganglion, and the presence of FS is determined by the expression of ganglioside GQ1b in the human nervous system. Neurophysiological findings suggest that ataxia and areflexia are due to an impaired proprioceptive afferent system. Typically, the soleus H-reflex is absent and a body-sway analysis using posturography shows a 1-Hz peak, which indicates proprioception dysfunction...
November 20, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/27916956/functional-diversity-of-neurotrophin-actions-on-the-oculomotor-system
#2
REVIEW
Beatriz Benítez-Temiño, María A Davis-López de Carrizosa, Sara Morcuende, Esperanza R Matarredona, Rosa R de la Cruz, Angel M Pastor
Neurotrophins play a principal role in neuronal survival and differentiation during development, but also in the maintenance of appropriate adult neuronal circuits and phenotypes. In the oculomotor system, we have demonstrated that neurotrophins are key regulators of developing and adult neuronal properties, but with peculiarities depending on each neurotrophin. For instance, the administration of NGF (nerve growth factor), BDNF (brain-derived neurotrophic factor) or NT-3 (neurotrophin-3) protects neonatal extraocular motoneurons from cell death after axotomy, but only NGF and BDNF prevent the downregulation in ChAT (choline acetyltransferase)...
December 1, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27904500/electrical-stimulation-promotes-regeneration-of-injured-oculomotor-nerves-in-dogs
#3
Lei Du, Min Yang, Liang Wan, Xu-Hui Wang, Shi-Ting Li
Functional recovery after oculomotor nerve injury is very poor. Electrical stimulation has been shown to promote regeneration of injured nerves. We hypothesized that electrical stimulation would improve the functional recovery of injured oculomotor nerves. Oculomotor nerve injury models were created by crushing the right oculomotor nerves of adult dogs. Stimulating electrodes were positioned in both proximal and distal locations of the lesion, and non-continuous rectangular, biphasic current pulses (0.7 V, 5 Hz) were administered 1 hour daily for 2 consecutive weeks...
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27903814/blink-associated-contralateral-eccentric-saccades-as-a-rare-sign-of-unilateral-brain-injury
#4
Ilaria Zivi, Eugenio Bertelli, Giacinta Bilotti, Ignazio Alessandro Clemente, Leopold Saltuari, Giuseppe Frazzitta
OBJECTIVE: To describe a rare sign of unilateral brain injury as a form of unwanted blink-associated contralateral eccentric saccades. METHODS: A 62-year-old patient who underwent an ischemic stroke affecting the entire right middle cerebral artery territory came to our attention 1 year after stroke, manifesting with transient contralateral conjugate gaze deviations associated with spontaneous blinking. We complemented the regular neurologic evaluation with brain MRI, study of evoked potentials, electroneurography of the facial nerve, and infrared video-oculoscopy...
November 30, 2016: Neurology
https://www.readbyqxmd.com/read/27899887/saccadic-adaptation-alters-the-attentional-field
#5
Farahnaz A Wick, Tyler W Garaas, Marc Pomplun
It is currently unknown whether changes to the oculomotor system can induce changes to the distribution of spatial attention around a fixated target. Previous studies have used perceptual performance tasks to show that adaptation of saccadic eye movements affects dynamic properties of visual attention, in particular, attentional shifts to a cued location. In this study, we examined the effects of saccadic adaptation on the static distribution of visual attention around fixation (attentional field). We used the classic double step adaptation procedure and a flanker task to test for differences in the attentional field after forward and backward adaptation...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27893991/saclab-a-toolbox-for-saccade-analysis-to-increase-usability-of-eye-tracking-systems-in-clinical-ophthalmology-practice
#6
Laura Cercenelli, Guido Tiberi, Ivan Corazza, Giuseppe Giannaccare, Michela Fresina, Emanuela Marcelli
PURPOSE: Many open source software packages have been recently developed to expand the usability of eye tracking systems to study oculomotor behavior, but none of these is specifically designed to encompass all the main functions required for creating eye tracking tests and for providing the automatic analysis of saccadic eye movements. The aim of this study is to introduce SacLab, an intuitive, freely-available MATLAB toolbox based on Graphical User Interfaces (GUIs) that we have developed to increase the usability of the ViewPoint EyeTracker (Arrington Research, Scottsdale, AZ, USA) in clinical ophthalmology practice...
November 22, 2016: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/27886888/imaging-of-oculomotor-third-cranial-nerve-palsy
#7
REVIEW
Michael S Vaphiades, Glenn H Roberson
When evaluating a patient with an oculomotor cranial nerve palsy it may be unclear which neuroimaging modality is optimal; MRI, MR angiography, computed tomography, computed tomography angiography, or intraarterial digital subtraction angiography. We discuss the clinical guidelines in the evaluation of such patients and review neuroimaging techniques, outlining the advantages and disadvantages of each.
February 2017: Neurologic Clinics
https://www.readbyqxmd.com/read/27884738/development-of-the-human-oculomotor-nuclear-complex-centrally-projecting-edinger-westphal-nucleus
#8
Katsuyuki Yamaguchi
BACKGROUND: The cytoarchitecturally defined Edinger-Westphal nucleus (EW) is now referred to by many investigators as the centrally-projecting EW (EWcp) in humans. Although the mature structure is well-characterized, there have been few reports describing the precise morphology of this nucleus during the second half of gestation. SUBJECTS/DESIGN: Eleven brains were examined from preterm infants, aged 20-39 postmenstrual weeks, who died of various causes. After fixation, the brains were embedded in celloidin and serial sections of 30-μm thickness were cut in the horizontal plane...
November 21, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27876664/isolated-hypertrophic-neuropathy-of-the-oculomotor-nerve
#9
Joshua J Lim, H Brent Clark, Andrew W Grande
No abstract text is available yet for this article.
November 19, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27874249/role-of-neural-integrators-in-oculomotor-systems-a%C3%A2-systematic-narrative-literature-review
#10
REVIEW
Katherine Sanchez, Fiona J Rowe
PURPOSE: To evaluate the role of neural integrators (NI) in the oculomotor system. METHODS: A literature search was carried out using several electronic databases during the months of June 2014 to March 2015. The following keywords were used to generate focused results: 'neural integrators', 'gaze-holding', 'oculomotor integration', 'impaired gaze-holding', 'gaze evoked nystagmus' and 'gaze dysfunction'. Further materials were found through searching relevant articles within reference lists...
November 22, 2016: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27873185/regressions-during-reading-the-cost-depends-on-the-cause
#11
Michael A Eskenazi, Jocelyn R Folk
The direction and duration of eye movements during reading is predominantly determined by cognitive and linguistic processing, but some low-level oculomotor effects also influence the duration and direction of eye movements. One such effect is inhibition of return (IOR), which results in an increased latency to return attention to a target that has been previously attended (Posner & Cohen, Attention and Performance X: Control of Language Processes, 32, 531-556, 1984). Although this is a low level effect, it has also been found in the complex task of reading (Henderson & Luke, Psychonomic Bulletin & Review, 19(6), 1101-1107, 2012; Rayner, Juhasz, Ashby, & Clifton, Vision Research, 43(9), 1027-1034, 2003)...
November 21, 2016: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/27863479/myasthenic-symptoms-in-anti-low-density-lipoprotein-receptor-related-protein-4-antibody-seropositive-amyotrophic-lateral-sclerosis-two-case-reports
#12
Hisashi Takahashi, Yu-Ichi Noto, Naoki Makita, Yukie Kushimura-Okada, Ryotaro Ishii, Akihiro Tanaka, Tomoyuki Ohara, Shunya Nakane, Osamu Higuchi, Masanori Nakagawa, Toshiki Mizuno
BACKGROUND: Myasthenic symptoms can be present in patients with amyotrophic lateral sclerosis (ALS). These symptoms have been considered to be caused by the degeneration of distal motor neurons and the neuromuscular junction (NMJ). Recent studies suggested that antibody to low-density lipoprotein receptor-related protein 4 (LRP4) was a pathogenic agent of myasthenia gravis (MG), and it was also detected in ALS patients. CASE PRESENTATION: Patient 1: A 58-year-old Japanese man developed progressive weakness and subsequent myasthenic symptoms including oculomotor disturbance...
November 18, 2016: BMC Neurology
https://www.readbyqxmd.com/read/27861377/familial-atypical-parkinsonism-with-rare-variant-in-vps35-and-fbxo7-genes-a-case-report
#13
Tereza Bartonikova, Katerina Mensikova, Lenka Mikulicova, Radek Vodicka, Radek Vrtel, Marek Godava, Miroslav Vastik, Michaela Kaiserova, Pavel Otruba, Iva Dolinova, Martin Nevrly, Petr Kanovsky
BACKGROUND: A higher prevalence of parkinsonism was recently identified in southeastern Moravia (Czech Republic). Further research confirmed 3 large pedigrees with familial autosomal-dominant parkinsonism spanning 5 generations. METHODS: This case report concerns a patient belonging to one of these 3 pedigrees, in whom motor and oculomotor symptoms were accompanied by frontal-type dementia, who finally developed a clinical phenotype of progressive supranuclear palsy...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27859787/microsurgical-anatomy-of-the-oculomotor-nerve
#14
REVIEW
HaeKwan Park, HyungKeun Rha, KyungJin Lee, ChungKee Chough, Wonil Joo
The oculomotor nerve supplies the extraocular muscles. It also supplies the ciliary and sphincter pupillae muscles through the ciliary ganglion. The nerve fibers leave the midbrain through the most medial part of the cerebral peduncle and enter the interpeduncular cistern. After the oculomotor nerve emerges from the interpeduncular fossa, it enters the cavernous sinus slightly lateral and anterior to the dorsum sellae. It enters the orbit through the superior orbital fissure, after exiting the cavernous sinus, to innervate the extraocular muscles...
November 18, 2016: Clinical Anatomy
https://www.readbyqxmd.com/read/27859647/spatial-but-not-oculomotor-information-biases-perceptual-memory-evidence-from-face-perception-and-cognitive-modeling
#15
Andrea L Wantz, Janek S Lobmaier, Fred W Mast, Walter Senn
Recent research put forward the hypothesis that eye movements are integrated in memory representations and are reactivated when later recalled. However, "looking back to nothing" during recall might be a consequence of spatial memory retrieval. Here, we aimed at distinguishing between the effect of spatial and oculomotor information on perceptual memory. Participants' task was to judge whether a morph looked rather like the first or second previously presented face. Crucially, faces and morphs were presented in a way that the morph reactivated oculomotor and/or spatial information associated with one of the previously encoded faces...
November 17, 2016: Cognitive Science
https://www.readbyqxmd.com/read/27857868/surgical-anatomy-of-the-medial-wall-of-the-orbit-in-14-human-cadavers
#16
Juan R Gras-Cabrerizo, Maria Martel-Martin, Jacinto Garcia-Lorenzo, Fernando Rodríguez-Álvarez, Joan R Montserrat-Gili, Rosa Mirapeix-Lucas, Humbert Massegur-Solench
Objective The aim of our study is to present the anatomical landmarks to perform an endoscopic endonasal approach to the medial wall of the orbit (EEAMO). Material and Methods We performed 14 complete nasal and orbital endoscopic dissections in 7 adult cadaveric heads. Results The EEAMO provides a surgical corridor between the medial rectus muscle superiorly and the inferior rectus muscle inferiorly .The mean distance between the ethmoidal crest and medial rectus muscle was 1.5 cm (range, 1.3-1.9 cm)...
December 2016: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/27852024/-parietal-association-area-and-motion-information-processing
#17
Takanori Uka
Motion perception plays an important role in everyday life. The investigation of the neural mechanisms underlying the distinguishing of the direction of motion has broadly expanded our understanding of the neural mechanisms of not only visual motion processing but also how integration of visual information is linked with intentional behavior. The lateral intraparietal (LIP) cortex is a crucial area involved in perceptual decision making and oculomotor planning. Here, I have reviewed the neural mechanisms underlying visual motion processing and describe how intentional behavior results from motion information...
November 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27844097/the-effects-of-unilateral-versus-bilateral-subthalamic-nucleus-deep-brain-stimulation-on-prosaccades-and-antisaccades-in-parkinson-s-disease
#18
Lisa C Goelz, Fabian J David, John A Sweeney, David E Vaillancourt, Howard Poizner, Leonard Verhagen Metman, Daniel M Corcos
Unilateral deep brain stimulation (DBS) of the subthalamic nucleus (STN) in patients with Parkinson's disease improves skeletomotor function assessed clinically, and bilateral STN DBS improves motor function to a significantly greater extent. It is unknown whether unilateral STN DBS improves oculomotor function and whether bilateral STN DBS improves it to a greater extent. Further, it has also been shown that bilateral, but not unilateral, STN DBS is associated with some impaired cognitive-motor functions. The current study compared the effect of unilateral and bilateral STN DBS on sensorimotor and cognitive aspects of oculomotor control...
November 14, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27843362/isolated-oculomotor-nerve-palsy-resulting-from-acute-traumatic-tentorial-subdural-hematoma
#19
Victoria Cui, Timur Kouliev
Acute subdural hematoma (SDH) resulting from head trauma is a potentially life-threatening condition that requires expedient diagnosis and intervention to ensure optimal patient outcomes. Rapidly expanding or large hematomas, elevated intracranial pressure, and associated complications of brain herniation are associated with high mortality rates and poor recovery of neurological function. However, smaller bleeds (clot thickness <10 mm) or hematomas occurring in infrequent locations, such as the tentorium cerebelli, may be difficult to recognize and patients may present with unusual or subtle signs and symptoms, including isolated cranial nerve palsies...
2016: Open Access Emergency Medicine: OAEM
https://www.readbyqxmd.com/read/27836709/a-temporal-dependency-account-of-attentional-inhibition-in-oculomotor-control
#20
Matthew D Weaver, Wieske van Zoest, Clayton Hickey
We used concurrent electroencephalogram (EEG) and eye tracking to investigate the role of covert attentional mechanisms in the control of oculomotor behavior. Human participants made speeded saccades to targets that were presented alongside salient distractors. By subsequently sorting trials based on whether the distractor was strongly represented or suppressed by the visual system - as evident in the accuracy (Exp. 1) or quality of the saccade (Exp. 2) - we could characterize and contrast pre-saccadic neural activity as a function of whether oculomotor control was established...
November 9, 2016: NeuroImage
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"