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https://www.readbyqxmd.com/read/28210639/an-interesting-case-of-tolosa-hunt-syndrome-in-a-young-male
#1
Ghulam Murtaza, Nicholas Konowitz, Hannah Lu, Anadil Faqah, Aneesh Kuruvilla
Tolosa-Hunt syndrome is a rare disease with a limited number of cases reported in the literature. It typically presents with orbital pain associated with palsy of the third, fourth, or sixth cranial nerve. We present an interesting case of Tolosa-Hunt syndrome in a young male who responded well to high-dose steroids and in a few days had significant improvement in his retro-orbital pain and ocular movements.
January 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28208719/micro-computed-tomography-detection-of-gold-nanoparticle-labelled-mesenchymal-stem-cells-in-the-rat-subretinal-layer
#2
Pooi Ling Mok, Sue Ngein Leow, Avin Ee-Hwan Koh, Hairul Harun Mohd Nizam, Suet Lee Shirley Ding, Chi Luu, Raduan Ruhaslizan, Hon Seng Wong, Wan Haslina Wan Abdul Halim, Min Hwei Ng, Ruszymah Binti Hj Idrus, Shiplu Roy Chowdhury, Catherine Mae-Lynn Bastion, Suresh Kumar Subbiah, Akon Higuchi, Abdullah A Alarfaj, Kong Yong Then
Mesenchymal stem cells are widely used in many pre-clinical and clinical settings. Despite advances in molecular technology; the migration and homing activities of these cells in in vivo systems are not well understood. Labelling mesenchymal stem cells with gold nanoparticles has no cytotoxic effect and may offer suitable indications for stem cell tracking. Here, we report a simple protocol to label mesenchymal stem cells using 80 nm gold nanoparticles. Once the cells and particles were incubated together for 24 h, the labelled products were injected into the rat subretinal layer...
February 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28194221/a-removal-of-eye-movement-and-blink-artifacts-from-eeg-data-using-morphological-component-analysis
#3
Balbir Singh, Hiroaki Wagatsuma
EEG signals contain a large amount of ocular artifacts with different time-frequency properties mixing together in EEGs of interest. The artifact removal has been substantially dealt with by existing decomposition methods known as PCA and ICA based on the orthogonality of signal vectors or statistical independence of signal components. We focused on the signal morphology and proposed a systematic decomposition method to identify the type of signal components on the basis of sparsity in the time-frequency domain based on Morphological Component Analysis (MCA), which provides a way of reconstruction that guarantees accuracy in reconstruction by using multiple bases in accordance with the concept of "dictionary...
2017: Computational and Mathematical Methods in Medicine
https://www.readbyqxmd.com/read/28194135/inaccurate-saccades-and-enhanced-vestibulo-ocular-reflex-suppression-during-combined-eye-head-movements-in-patients-with-chronic-neck-pain-possible-implications-for-cervical-vertigo
#4
Janine L Johnston, Pierre M Daye, Glen T D Thomson
BACKGROUND: The primate ocular motor system is designed to acquire peripheral targets of interest by coordinating visual, vestibular, and neck muscle activation signals. The vestibulo-ocular reflex (VOR) is greatly reduced at the onset of large eye-head (gaze) saccades and resumes before the end of the saccades to stabilize eye-in-orbit and ensure accurate target acquisition. Previous studies have relied on manipulating head movements in normal individuals to study VOR suppression and gaze kinematics...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28184211/disrupted-saccade-control-in-chronic-cerebral-injury-upper-motor-neuron-like-disinhibition-in-the-ocular-motor-system
#5
John-Ross Rizzo, Todd E Hudson, Andrew Abdou, Yvonne W Lui, Janet C Rucker, Preeti Raghavan, Michael S Landy
Saccades rapidly direct the line of sight to targets of interest to make use of the high acuity foveal region of the retina. These fast eye movements are instrumental for scanning visual scenes, foveating targets, and, ultimately, serve to guide manual motor control, including eye-hand coordination. Cerebral injury has long been known to impair ocular motor control. Recently, it has been suggested that alterations in control may be useful as a marker for recovery. We measured eye movement control in a saccade task in subjects with chronic middle cerebral artery stroke with both cortical and substantial basal ganglia involvement and in healthy controls...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28176802/ocular-reflex-phase-during-off-vertical-axis-rotation-in-humans-is-modified-by-head-turn-on-trunk-position
#6
Samantha B Douglas, Gilles Clément, Pierre Denise, Scott J Wood
Constant velocity Off-Vertical Axis Rotation (OVAR) imposes a continuously varying orientation of the head and body relative to gravity, which generates a modulation of horizontal (conjugate and vergence), vertical, and torsional eye movements. We introduced the head-turn-on-trunk paradigm during OVAR to examine the extent to whether the modulation of these ocular reflexes is mediated by graviceptors in the head, i.e., otoliths, versus other body graviceptors. Ten human subjects were rotated in darkness about their longitudinal axis 20° off-vertical at a constant velocity of 45 and 180°/s, corresponding to 0...
February 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28165827/clinical-characteristics-treatment-and-outcome-of-trochleitis
#7
Elena Jarrín, Ángel García-García, Francisco J Hurtado-Ceña, José M Rodríguez-Sánchez
BACKGROUND AND PURPOSE: To study the clinical characteristics, treatment options, and outcome of patients with trochleitis in our population. METHODS: Retrospective review of 59 patients diagnosed with trochleitis in the Ramon y Cajal Hospital Emergency Service between 2003 and 2010. Demographic data and trochleitis features were described. The relationship between outcome and treatment options was analyzed by SPSS. RESULTS: The estimated prevalence rate of trochleitis in our area was 12 per 100,000...
February 6, 2017: Strabismus
https://www.readbyqxmd.com/read/28163935/short-term-monocular-deprivation-enhances-physiological-pupillary-oscillations
#8
Paola Binda, Claudia Lunghi
Short-term monocular deprivation alters visual perception in adult humans, increasing the dominance of the deprived eye, for example, as measured with binocular rivalry. This form of plasticity may depend upon the inhibition/excitation balance in the visual cortex. Recent work suggests that cortical excitability is reliably tracked by dilations and constrictions of the pupils of the eyes. Here, we ask whether monocular deprivation produces a systematic change of pupil behavior, as measured at rest, that is independent of the change of visual perception...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28163346/in-vivo-intrinsic-optical-signal-imaging-of-mouse-retinas
#9
Benquan Wang, Xincheng Yao
Intrinsic optical signal (IOS) imaging is a promising noninvasive method for advanced study and diagnosis of eye diseases. Before pursuing clinical applications, more IOS studies employing animal models are necessary to establish the relationship between IOS distortions and eye diseases. Ample mouse models are available for investigating the relationship between IOS distortions and eye diseases. However, in vivo IOS imaging of mouse retinas is challenging due to the small ocular lens (compared to frog eyes) and inevitable eye movements...
February 13, 2016: Proceedings of SPIE
https://www.readbyqxmd.com/read/28129166/emulation-of-physician-tasks-in-eye-tracked-virtual
#10
Jason Orlosky, Yuta Itoh, Maud Ranchet, Kiyoshi Kiyokawa, John Morgan, Hannes Devos
For neurodegenerative conditions like Parkinson's disease, early and accurate diagnosis is still a difficult task. Evaluations can be time consuming, patients must often travel to metropolitan areas or different cities to see experts, and misdiagnosis can result in improper treatment. To date, only a handful of assistive or remote methods exist to help physicians evaluate patients with suspected neurological disease in a convenient and consistent way. In this paper, we present a low-cost VR interface designed to support evaluation and diagnosis of neurodegenerative disease and test its use in a clinical setting...
January 23, 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/28124293/influence-of-simple-action-on-subsequent-manual-and-ocular-responses
#11
Fei Wang, Ji Sun, Pei Sun, Blaire J Weidler, Richard A Abrams
Recent investigations into how action affects perception have revealed an interesting "action effect"-that is, simply acting upon an object enhances its processing in subsequent tasks. The previous studies, however, relied only on manual responses, allowing an alternative stimulus-response binding account of the effect. The current study examined whether the action effect occurs in the presence of changes in response modalities. In Experiment 1, participants completed a modified action effect paradigm, in which they first produced an arbitrary manual response to a shape and then performed a visual search task in which the previous shape was either a valid or invalid cue-responding with a manual or saccadic response...
January 25, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28123747/improving-visual-assessment-documentation-in-patients-with-periorbital-trauma-through-an-eye-assessment-teaching-session-and-a-proforma-sticker
#12
Tharsika Myuran
Up to 30% of patients who have periorbital trauma will have ocular injury with devastating consequences if missed. All staff working with acutely injured Oral and Maxillofacial Surgery (OMFS) patients should be competent in a basic eye examination with documentation of visual acuity, gross visual fields, eye movements, diplopia, and pupillary responses at a minimum. As a standard we adapted guidance published by the Emergency Care Institute New South Wales to assess the documentation of the eye examination in OMFS patients at King's College Hospital with any periorbital injury...
2017: BMJ Quality Improvement Reports
https://www.readbyqxmd.com/read/28115874/optic-neuritis-and-acute-anterior-uveitis-associated-with-influenza-a-infection-a-case-report
#13
Hayate Nakagawa, Hidetaka Noma, Osamu Kotake, Ryosuke Motohashi, Kanako Yasuda, Masahiko Shimura
BACKGROUND: A few reports have described ocular complications of influenza A infection, such as impaired ocular movement, parasympathetic ocular nerve, keratitis, macular lesion, and frosted branch angiitis. We encountered a rare case of acute anterior uveitis and optic neuritis associated with influenza A infection. CASE PRESENTATION: A 70-year-old man presented with symptoms of upper respiratory tract infection. A rapid diagnostic test showed a positive result for influenza A...
2017: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/28113291/discriminative-ocular-artifact-correction-for-feature-learning-in-eeg-analysis
#14
Xinyang Li, Cuntai Guan, Haihong Zhang, Kai Keng Ang
Electrooculogram (EOG) artifact contamination is a common critical issue in general electroencephalogram (EEG) studies as well as in brain computer interface (BCI) research. It is especially challenging when dedicated EOG channels are unavailable or when there are very few EEG channels available for ICA-based ocular artifact removal. It is even more challenging to avoid loss of the signal of interest during the artifact correction process, where the signal of interest can be multiple magnitudes weaker than the artifact...
November 16, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28112128/visual-function-of-children-with-visual-and-other-disabilities-in-oman-a-case-series
#15
Urmi Gogri, Rajiv Khandekar, Salah Al Harby
BACKGROUND: We assessed the visual functioning of the children with special needs in Oman between 2009 and 2012. We present the methods of assessing different visual functions, outcomes, and interventions carried out to improve their functioning. METHODS: Optometrists assessed visual functions of children of "Day care centres" in Oman. Experts further assessed them and provided low vision care. Ocular movements, refractive corrections, near, distance, contrast color, motion, field of vision, and cognitive visual function test results were noted...
December 2016: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28102342/neural-activity-in-the-dorsal-medial-superior-temporal-area-of-monkeys-represents-retinal-error-during-adaptive-motor-learning
#16
Aya Takemura, Tomoyo Ofuji, Kenichiro Miura, Kenji Kawano
To adapt to variable environments, humans regulate their behavior by modulating gains in sensory-to-motor processing. In this study, we measured a simple eye movement, the ocular following response (OFR), in monkeys to study the neuronal basis of adaptive motor learning in the visuomotor processing stream. The medial superior temporal (MST) area of the cerebral cortex is a critical site for contextual gain modulation of the OFR. However, the role of MST neurons in adaptive gain modulation of the OFR remains unknown...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28095664/cutaneous-leishmaniasis-of-the-eyelids-a-case-series-with-molecular-identification-and-literature-review
#17
Iraj Mohammadpour, Mohammad Hossein Motazedian, Farhad Handjani, Gholam Reza Hatam
Cutaneous leishmaniasis (CL) is a protozoan disease which is endemic in Iran. It is transmitted by the Phlebotomus sand fly. The eyelid is rarely involved possibly because the movement of the lids impedes the sand fly from biting the skin in this region. Here, we report 6 rare cases of eyelid CL. The patients were diagnosed by skin scraping, culture, and PCR from the lesions. Skin scraping examination showed Leishmania spp. amastigotes in the cytoplasm of macrophages. Culture examination was positive for Leishmania spp...
December 2016: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28079687/periocular-amyloidosis-manifesting-as-pseudopemphigoid-treated-with-mitomycin-c
#18
Kaveh Vahdani, Vladimir T Thaller, Giorgio Albanese, Andrew F Dean
PURPOSE: To describe an unusual cicatrizing manifestation of periocular amyloid and the utility of adjuvant antimetabolite therapy. METHODS: This is a case report of a 49-year old woman with progressive bilateral upper lid ptosis, who was found to have bilateral inferior forniceal masses with thickening of the conjunctiva. Conjunctival and eyelid biopsies showed evidence of amyloid deposition. Systemic evaluation did not reveal any evidence of systemic amyloidosis...
January 11, 2017: Cornea
https://www.readbyqxmd.com/read/28073689/corneo-scleral-contact-lens-in-a-piggyback-system-for-keratoconus-a-case-report
#19
Esteban Porcar, Juan Carlos Montalt, Enrique España-Gregori, Cristina Peris-Martínez
PURPOSE: We describe a case of fitting a corneo-scleral contact lens with a multi-aspheric geometry design (MAGD CScL) on top of a daily silicone hydrogel lens (piggyback system) for keratoconus management. METHODS: A 48-year-old man using soft toric contact lenses required an improvement in the unsatisfactory quality of his vision. He presented with bilateral asymmetric keratoconus with high myopia in the right eye (RE) and severe myopia in the left eye (LE). In addition, he had low vision in his LE because of a maculopathy...
January 7, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28058171/orbital-eccrine-hidrocystoma
#20
Deniz Marangoz, Işın Doğan Ekici, Ferda Çiftçi
A 29-year-old female patient presented with a painless mass on her upper eyelid medially. She noticed the mass 4 years earlier and it had increased in size over time. She had no diplopia, eyelid swelling, skin lesion overlying the mass, or visual disturbances. On ocular examination, eye movements and funduscopy were normal. The mass was movable and painless with palpation. Magnetic resonance imaging with contrast showed a 12x8x7 mm well-circumscribed cystic lesion with no contrast dye appearance. Surgical removal was performed delicately and no capsular rupture occured...
October 2016: Turkish Journal of Ophthalmology
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