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https://www.readbyqxmd.com/read/29141275/roles-of-the-declive-folium-and-tuber-cerebellar-vermian-lobules-in-sportspeople
#1
In Sung Park, Nam Joon Lee, Im Joo Rhyu
The cerebellum plays vital roles in balance control and motor learning, including in saccadic adaptation and coordination. It consists of the vermis and two hemispheres and is anatomically separated into ten lobules that are designated as I-X. Although neuroimaging and clinical studies suggest that functions are compartmentalized within the cerebellum, the function of each cerebellar lobule is not fully understood. Electrophysiological and lesion studies in animals as well as neuroimaging and lesion studies in humans have revealed that vermian lobules VI and VII (declive, folium, and tuber) are critical for controlling postural balance, saccadic eye movements, and coordination...
September 28, 2017: Journal of Clinical Neurology
https://www.readbyqxmd.com/read/29140527/functional-organization-of-face-processing-in-the-human-superior-temporal-sulcus-a-7t-high-resolution-fmri-study
#2
Anne-Kathrin Schobert, Corrado Corradi-Dell'Acqua, Sascha Frühholz, Wietske van der Zwaag, Patrik Vuilleumier
The superior temporal sulcus (STS) is a major component of the human face perception network, implicated in processing dynamic changeable aspects of faces. However, it remains unknown whether STS holds functionally segregated subdivisions for different categories of facial movements. We used high-resolution functional magnetic resonance imaging (fMRI) at 7T in 16 volunteers to compare STS activation to faces displaying angry or happy expressions, eye-gaze shifts, and lip-speech movements. Combining univariate and multivariate analyses, we show a systematic topological organization within STS, with gaze-related activity predominating in the most posterior and superior sector, speech-related activity in the anterior sector, and emotional expressions represented in the intermediate middle STS...
November 11, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/29137945/the-effects-of-local-microinjection-of-selective-dopamine-d1-and-d2-receptor-agonists-and-antagonists-into-the-dorsal-raphe-nucleus-on-sleep-and-wakefulness-in-the-rat
#3
Jaime M Monti, Héctor Jantos
The effects of the dopamine (DA) D1 and D2 receptor agonists SKF38393, bromocriptine and quinpirole, respectively, on spontaneous sleep were analyzed in adult rats prepared for chronic sleep recordings. Local administration of the DAergic agonists into the dorsal raphe nucleus (DRN) during the light phase of the light-dark cycle induced a significant reduction of rapid-eye movement sleep (REMS) and the number of REM periods. Additionally, bromocriptine and quinpirole significantly increased wakefulness (W)...
November 11, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29136526/upbeat-nystagmus-is-a-useful-sign-in-the-regional-diagnosis-of-trigeminal-nerve-disorder-with-multiple-sclerosis
#4
Kiyotaka Nakamagoe, Naoki Tozaka, Seitaro Nohara, Rio Kawakami, Shiori Yamada, Tadachika Koganezawa, Akira Tamaoka
Trigeminal nerve disorder is an important neurological sign that is often seen with multiple sclerosis (MS). We investigated eye movements in three MS patients with trigeminal disorder due to pontine lesions near the trigeminal root entry zone (REZ). Upbeat nystagmus was observed in all MS patients with trigeminal REZ lesions. We conjecture that trigeminal nerve disorder and upbeat nystagmus appeared due to simultaneous damage to both the trigeminal nerve and the vestibulo-ocular reflex pathway. If upbeat nystagmus appears in MS patients exhibiting a trigeminal nerve disorder, such as trigeminal neuralgia, and paralysis, pontine lesions near the trigeminal REZ should be considered...
November 9, 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29136344/the-hypoxic-test-in-preterm-neonates-reinvestigated
#5
Christelle Kouakam, Erwan Stephan-Blanchard, André Léké, Guy Kongolo, Elodie Haraux, Stéphane Delanaud, Frédéric Telliez, Karen Chardon
AIM: We currently lack a suitable gold-standard method for implementation on modern equipment to assess peripheral chemoreceptor sensitivity. The aim of the present study was to develop an accurate and reproducible method for assessing peripheral chemoreceptors sensitivity in sleeping preterm neonates. METHODS: A poïkilocapnic hypoxic test was performed twice during rapid eye movement sleep (REM sleep) and non-rapid eye movement sleep (nonREM sleep). The infant breathed hypoxic gas (15% O2 ) for 60 s...
November 14, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/29136002/the-role-of-character-positional-frequency-on-chinese-word-learning-during-natural-reading
#6
Feifei Liang, Hazel I Blythe, Xuejun Bai, Guoli Yan, Xin Li, Chuanli Zang, Simon P Liversedge
Readers' eye movements were recorded to examine the role of character positional frequency on Chinese lexical acquisition during reading and its possible modulation by word spacing. In Experiment 1, three types of pseudowords were constructed based on each character's positional frequency, providing congruent, incongruent, and no positional word segmentation information. Each pseudoword was embedded into two sets of sentences, for the learning and the test phases. In the learning phase, half the participants read sentences in word-spaced format, and half in unspaced format...
2017: PloS One
https://www.readbyqxmd.com/read/29135813/pendular-seesaw-nystagmus-in-a-patient-with-a-giant-pituitary-macroadenoma-pathophysiology-and-the-role-of-the-accessory-optic-system
#7
Peter Yat-Ming Woo, Saori Takemura, Allen Ming-Yan Cheong, Alberto Chi-Ho Chu, Yung Chan, Hoi-Tung Wong, Kwong-Yau Chan
Seesaw nystagmus is characterized by cyclic eye movements with a conjugate torsional component and a dissociated vertical component. In the first half of the cycle, one eye elevates and intorts, whereas the other eye depresses and extorts. The pattern is reversed in the remaining half of the cycle. We describe a patient with a giant pituitary adenoma who developed pendular seesaw nystagmus. Disturbance in the visuovestibular system is postulated to contribute to this form of seesaw nystagmus. Lesions compressing the optic chiasm and the accessory optic system could interrupt the transmission of retinal error signals to the inferior olivary nucleus and the interstitial nucleus of Cajal, thus interfering with the adaptive mechanism of the vestibulo-ocular reflex and leading to pendular seesaw nystagmus...
November 9, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/29135316/final-visual-outcomes-and-treatment-received-for-children-referred-from-a-uk-primary-school-visual-screening-program-a-comparison-of-an-orthoptic-led-program-with-orthoptic-delivered-services
#8
Tess Garretty
There is little published evidence relating to the final visual acuity of children who are identified as having reduced vision at a school screening program. The school vision screening program in Leeds (led by an orthoptist but delivered by health care support workers within the school nursing team) is examined. RESULTS: 7807 children were screened in school between November 1, 2013, and September 1, 2014. Of these, 319 (4%) failed the screen and were referred to the general optometry service and 547 (7%) were referred to the Children's Community Eye Service (CCES)...
November 14, 2017: Strabismus
https://www.readbyqxmd.com/read/29134944/distinct-spatial-coordinate-of-visual-and-vestibular-heading-signals-in-macaque-fefsem-and-mstd
#9
Lihua Yang, Yong Gu
Precise heading estimate requires integration of visual optic flow and vestibular inertial motion originating from distinct spatial coordinates (eye- and head-centered, respectively). To explore whether the two heading signals may share a common reference frame along the hierarchy of cortical stages, we explored two multisensory areas in macaques: the smooth pursuit area of the frontal eye field (FEFsem) closer to the motor side, and the dorsal portion of medial superior temporal area (MSTd) closer to the sensory side...
November 14, 2017: ELife
https://www.readbyqxmd.com/read/29133973/duane-retraction-syndrome-causes-effects-and-management-strategies
#10
REVIEW
Ramesh Kekunnaya, Mithila Negalur
Duane retraction syndrome (DRS) is a congenital eye movement anomaly characterized by variable horizontal duction deficits, with narrowing of the palpebral fissure and globe retraction on attempted adduction, occasionally accompanied by upshoot or down-shoot. The etiopathogenesis of this condition can be explained by a spectrum of mechanical, innervational, neurologic and genetic abnormalities occurring independently or which influence each other giving rise to patterns of clinical presentations along with a complex set of ocular and systemic anomalies...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29133665/a-rare-case-of-bilateral-tractional-retinal-detachment-following-snakebite
#11
Nicey Roy Thomas, Debmalya Das, Kumar Saurabh, Rupak Roy
A 13-year-old female presented with diminution of vision in both eyes for 3 months following snakebite. Best-corrected visual acuities were hand movement in both eyes. Fundoscopy showed vitreous hemorrhage, and B-scan ultrasonography revealed an underlying tractional retinal detachment (TRD) involving the macula in both eyes. Patient underwent 25-gauge pars plana vitrectomy in conjunction with belt buckling, endolaser, and silicone oil tamponade in the left eye. At 6 weeks postoperatively, best-corrected visual acuity of the left eye was noted to be 20/200 with settled TRD and attached retina...
November 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29133438/normal-topography-and-binocularity-of-the-superior-colliculus-in-strabismus
#12
John R Economides, Brittany C Rapone, Daniel L Adams, Jonathan C Horton
In subjects with alternating strabismus either eye can be used to saccade to visual targets. The brain must calculate the correct vector for each saccade, which will depend on the eye chosen to make it. The superior colliculus, a major midbrain center for saccade generation, was examined to determine if the maps serving each eye were shifted to compensate for strabismus.Alternating exotropia was induced in two male macaques at age one month by sectioning the tendons of the medial recti. Once the animals grew to maturity, they were trained to fixate targets with either eye...
November 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29133433/attention-priority-map-of-face-images-in-human-early-visual-cortex
#13
Ce Mo, Dongjun He, Fang Fang
Attention priority maps are topographic representations that are utilized for attention selection and guidance of task-related behavior during visual processing. Previous studies have identified attention priority maps of simple artificial stimuli in multiple cortical and subcortical areas, while investigating neural correlates of priority maps of natural stimuli is complicated by the complexity of their spatial structure and the difficulty of behaviorally characterizing their priority map. To overcome these challenges, we reconstructed the topographic representations of upright/invered face images from fMRI BOLD signals in human early visual areas V1-V3 based on a voxel-wise population receptive field model and behaviorally characterized the priority map as the first saccadic eye movement pattern when subjects performed a face matching task, relative to the condition in which subjects performed a phase-scrambled face matching task...
November 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29133062/anatomical-and-physiological-basis-of-continuous-spike-wave-of-sleep-syndrome-after-early-thalamic-lesions
#14
Alberto Leal, Eulália Calado, José P Vieira, Carla Mendonça, José C Ferreira, Hugo Ferreira, Daniel Carvalho, Fátima Furtado, Roseli Gomes, José P Monteiro
OBJECTIVE: Early neonatal thalamic lesions account for about 14% of continuous spike-wave of sleep (CSWS) syndrome, representing the most common etiology in this epileptic encephalopathy in children, and promise useful insights into the pathophysiology of the disease. METHODS: We describe nine patients with unilateral neonatal thalamic lesions which progressed to CSWS. Longitudinal whole-night and high-density electroencephalograms (EEGs) were performed, as well as detailed imaging and clinical evaluation...
November 10, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29132267/spatial-bias-induced-by-simple-addition-and-subtraction-from-eye-movement-evidence
#15
Rongjuan Zhu, Yangmei Luo, Xuqun You, Ziyu Wang
The associations between number and space have been intensively investigated. Recent studies indicated that this association could extend to more complex tasks, such as mental arithmetic. However, the mechanism of arithmetic-space associations in mental arithmetic was still a topic of debate. Thus, in the current study, we adopted an eye-tracking technology to investigate whether spatial bias induced by mental arithmetic was related with spatial attention shifts on the mental number line or with semantic link between the operator and space...
January 1, 2017: Perception
https://www.readbyqxmd.com/read/29132064/patients-and-caregivers-contributions-for-differentiating-epileptic-from-psychogenic-nonepileptic-seizures-value-and-limitations-of-self-reporting-questionnaires-a-pilot-study
#16
Giuseppe Erba, Elisa Bianchi, Giorgia Giussani, John Langfitt, Adam Juersivich, Ettore Beghi
PURPOSE: Questionnaires investigating semiology and comorbidities of psychogenic non-epileptic seizures (PNES) have been used mainly to help physicians expedite referrals to epilepsy centres for confirmation of diagnosis rather than as alternative diagnostic tool when video-EEG monitoring (VEM), the current gold standard, is not available or is inconclusive. METHODS: We developed one structured questionnaire for patients, exploring subjective experiences and vulnerabilities and one for eyewitnesses, focused on features observable during typical events to study prospectively 50 consecutive adult patients with PNES or epileptic seizures (ES) admitted for VEM...
November 8, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29131924/when-an-orbital-infection-isn-t-infectious-at-all-a-review-of-orbital-inflammatory-syndrome
#17
Sadie A LaPonsie, Peter K Rabiah
Orbital inflammatory syndrome (OIS) includes a wide range of clinical manifestations and may initially be misdiagnosed as orbital cellulitis due similar symptoms of fever, periorbital swelling, and pain with eye movements. A diagnosis of OIS requires evaluation for underlying systemic disorders including autoimmune disorders and thyroid disease. Symptoms typically improve rapidly after initiation of steroid therapy, although recurrence can occur. This article presents an illustrative case of a 13-year-old girl with OIS...
November 1, 2017: Pediatric Annals
https://www.readbyqxmd.com/read/29131135/interhemispheric-and-infratentorial-subdural-empyema-with-preseptal-cellulitis-as-complications-of-sinusitis-a-case-report
#18
Muhammad Reza Arifianto, Achmad Zuhro Ma'ruf, Arie Ibrahim, Abdul Hafid Bajamal
Intracranial complications of paranasal sinusitis have become rare due to the use of antibiotics nowadays. However, several cases have been reported due the ability of paranasal sinusitis to cause serious complications. Once the infection spreads over the cranial structure, it could infect the orbits, underlying bones, meninges, adjacent veins, and brain. Subdural empyema is a rare but potentially life-threatening complication following paranasal sinusitis and should be considered as a neurological emergency...
November 11, 2017: Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29130674/-efficacy-of-superior-rectus-and-lateral-rectus-muscle-belly-union-surgery-for-myopic-strabismus-fixus
#19
Guo-Yuan Yang, Long-Qian Liu
OBJECTIVE: To evaluate the effectiveness of superior rectus (SR) and lateral rectus (LR) union suture without scleral fixation for the treatment of myopic strabismus fixus. METHODS: A retrospective review was performed on 27 eyes of 16 patients who underwent lateral part of SR and superior part of LR muscle belly union between January 2010 and October 2015. We collected the ocular data including: best corrected visual acuity,axial length,CT or MRI images,orthoptic measurements (by prism test),and eye movements pre- and postoperatively...
September 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/29129730/how-post-saccadic-target-blanking-affects-the-detection-of-stimulus-displacements-across-saccades
#20
David E Irwin, Maria M Robinson
When a visual stimulus is displaced during a saccade the displacement is often not noticed unless it is large compared to the amplitude of the eye movement. Displacement detection is improved, however, if a blank intervenes between saccade target offset and the presentation of the displaced post-saccadic stimulus. This has been interpreted as evidence that precise information about eye position and accurate memory for the position of the pre-saccadic target are available immediately after saccade offset, but are overridden by the presence of the post-saccadic stimulus if it is present when the eyes land...
November 9, 2017: Vision Research
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