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https://www.readbyqxmd.com/read/29145178/minor-hemisphere-major-syndromes
#1
Antonio Carota, Julien Bogousslavsky
A right "minor hemisphere" does not exist as the right hemisphere is dominant for awareness (nosognosia), spatial attention, emotional regulation, facial and voice expressions, visual recognition, and topographical orientation. Without the right hemisphere, the world would be flat, deprived of general and spatial attentions, pointing preferentially to the right side of the space, lacking visual experiences and emotions, exhibiting diminished awareness of the self and environment. Clinical-related syndromes of the right hemisphere are unilateral spatial neglect, object and face visual agnosia, the anosognosia for hemiparesis and/or hemianopia, misidentification syndromes, mania, and other obsessions for the food and the body...
2018: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/29128327/clinical-predictors-of-stroke-mimics-in-patients-treated-with-recombinant-tissue-plasminogen-activator-according-to-a-normal-multimodal-computed-tomography-imaging
#2
Stephane Olindo, Martin Chardonnet, Pauline Renou, Cyrielle Coignion, Sabrina Debruxelles, Mathilde Poli, Sharmila Sagnier, François Rouanet, Igor Sibon
BACKGROUND: Multimodal computed tomography imaging (MCTI) is increasingly used for rapid assessment of acute stroke. We investigated characteristics and final diagnoses of patients treated with recombinant tissue plasminogen activator (rt-PA) while admission imaging was unremarkable. METHODS: From our prospectively collected stroke database (2013-2016), we identified consecutive patients treated with rt-PA on the basis of an unremarkable brain MCTI and assessed with a 24-hour follow-up brain magnetic resonance imaging (MRI)...
November 8, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29110092/tracking-posttraumatic-hemianopia
#3
Thomas Decramer, Karel Van Keer, Peter Stalmans, Patrick Dupont, Stefan Sunaert, Tom Theys
Hemianopia after traumatic brain injury is not infrequent and results from retro-chiasmatic lesions. Differentiating optic pathway lesions can be challenging with classic imaging. Advanced imaging techniques as an investigational tool for posttraumatic hemianopia are discussed and their pitfalls highlighted through an illustrative case study. In a patient with posttraumatic hemianopia, MRI at 8 weeks and 2 years after trauma were analyzed. Diffusion tensor imaging (DTI) and morphometric analysis of the primary visual cortex (V1) were performed...
November 6, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/29075905/vertebrobasilar-dolichoectasia-causing-homonymous-hemianopia-a-case-report-and-review-of-the-literature
#4
Ladina Greuter, Jean-Yves Fournier
A 73-year-old man was diagnosed with an incidental finding of right homonymous hemianopia and presyncopal spells. Magnetic resonance imaging revealed a vertebrobasilar dolichoectasia (VBD) with compression of the left optic tract. VBD is defined as an elongation and dilatation of the basilar artery. Only a few cases have been described in the literature of VBD causing optic tract compression. So far no treatment option has been described for these cases, while surgical options exist for compressions of other cranial nerves, most commonly the trigeminal nerve...
October 26, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29067219/driving-with-hemianopia-v-do-individuals-with-hemianopia-spontaneously-adapt-their-gaze-scanning-to-differing-hazard-detection-demands
#5
Concetta F Alberti, Robert B Goldstein, Eli Peli, Alex R Bowers
PURPOSE: We investigated whether people with homonymous hemianopia (HH) were able to spontaneously (without training or instructions) adapt their blind-side scan magnitudes in response to differing scanning requirements for detection of pedestrians in a driving simulator when differing cues about pedestrian eccentricities and movement behaviors were available in the seeing hemifield. METHODS: Twelve HH participants completed two sessions in a driving simulator pressing the horn when they detected a pedestrian...
September 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/29042528/-a-case-of-ruptured-anterior-communicating-artery-aneurysm-with-visual-field-defects-and-deteriorating-to-severe-vision-loss
#6
Kazuki Sakakura, Go Ikeda, Yasunobu Nakai, Noriyuki Watanabe, Masanari Shiigai, Kazuya Uemura, Tetsuya Yamamoto, Akira Matsumura
Although Terson's syndrome is a well-known cause of vision loss due to intracerebral aneurysm rupture, optic nerve neuropathy can also occur because of other causes. Here, we report such a case, i.e., a ruptured anterior communicating artery aneurysm accompanied by vision loss and visual field disturbances due to a cause other than Terson's syndrome. A 47-year-old man presented with right superior altitudinal hemianopia. Computed tomography (CT) showed subarachnoid hemorrhage (SAH), and three-dimensional CT angiography revealed an anterior communicating artery aneurysm...
October 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/29018750/management-of-diplopia-with-visual-field-defects
#7
Ling-Yuh Kao, Chun-Hsiu Liu, Meng-Ling Yang
PURPOSE: The management of diplopia can be challenging in patients with a concurrent visual-field (VF) defect. We conducted a retrospective chart review to analyze and compare treatment outcomes for different types of VF defects. METHODS: A retrospective chart review. RESULTS: Seven patients with diplopia and VF defects were identified during the study. Four had bitemporal hemianopia, one had homonymous hemianopia, and two had a constricted central VF...
January 2017: Taiwan Journal of Ophthalmology
https://www.readbyqxmd.com/read/28994265/recognition-of-giant-cell-arteritis-in-patients-with-polymyalgia-rheumatica-who-have-a-stroke-a-cautionary-tale
#8
Donald H Gutteridge, Frank L Mastaglia
An 82-year-old woman with polymyalgia rheumatica (PMR) on prednisone 7 mg daily was admitted to an acute stroke unit with a right homonymous hemianopia, a left posterior cerebral artery occlusion and occipital lobe infarct. She had raised inflammatory markers, did not have a temporal artery biopsy, and was discharged on the same dose of prednisone. After 21 months, off prednisone, her ophthalmologist, concerned about giant cell arteritis (GCA), restarted prednisone 40 mg daily, with rapid, profound visual improvement...
October 2017: Internal Medicine Journal
https://www.readbyqxmd.com/read/28987906/visually-evoked-responses-from-the-blind-field-of-hemianopic-patients
#9
Javier Sanchez-Lopez, Caterina A Pedersini, Francesco Di Russo, Nicolò Cardobi, Cristina Fonte, Valentina Varalta, Massimo Prior, Nicola Smania, Silvia Savazzi, Carlo A Marzi
Hemianopia is a visual field defect characterized by decreased vision or blindness in the contralesional visual field of both eyes. The presence of well documented above-chance unconscious behavioural responses to visual stimuli presented to the blind hemifield (blindsight) has stimulated a great deal of research on the neural basis of this important phenomenon. The present study is concerned with electrophysiological responses from the blind field. Since previous studies found that transient Visual Evoked Potentials (VEPs) are not entirely suitable for this purpose here we propose to use Steady-State VEPs (SSVEPs)...
October 5, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28984725/ganglion-cell-layer-complex-measurements-in-compressive-optic-neuropathy
#10
REVIEW
Laurel N Vuong, Thomas R Hedges
PURPOSE OF REVIEW: Neuroophthalmologists and neurosurgeons are often asked by their patients what their visual prognosis will be after decompression of an optic chiasm lesion. Previous methods have been studied but have not provided consistent guidance. However, a recent algorithm which allows for retinal ganglion cell analysis from optical coherence tomography (OCT) may be more helpful. RECENT FINDINGS: Recent studies have shown that ganglion cell layer complex (GCC) measurements from OCT strongly correlate with the visual field loss associated with compressive optic neuropathies...
November 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28980562/-structural-retinal-and-optic-nerve-changes-in-patients-with-post-geniculate-visual-pathway-damage
#11
N M Eliseeva, N K Serova, V P Erichev, L A Panyushkina
AIM: To establish the possibility of retrograde trans-synaptic neural degeneration following acquired post-geniculate visual pathway damage. MATERIAL AND METHODS: Twenty-two patients with homonymous hemianopia caused by acquired post-geniculate visual pathway damage were examined. Peripapillary retinal nerve fiber layer (RNFL) thickness and ganglion cell complex (GCC) measurements were assessed with RTVue-100 Fourier-domain optical coherence tomography (OCT). RESULTS: In 12 out of 22 patients we detected binocular GCC thinning that was ipsilateral to post-geniculate involvement...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/28969214/isolated-sixth-cranial-nerve-palsy-in-a-case-of-severe-pre-eclampsia-presenting-as-postpartum-diplopia
#12
Aarti Yevale, Akhila Vasudeva, Anjali Mundkur, Pratap Kumar, Arvind Prabhu
Visual symptoms in pregnancy are ominous. The spectrum of ocular symptoms seen in pre-eclampsia includes blurring of vision, scotoma, hemianopia and even total cortical blindness. Diplopia, though rare has also been reported in cases of pre-eclampsia and occurs due to pathological changes affecting the 6(th) cranial nerve. Ocular symptoms of pre-eclampsia usually regress after delivery but occasionally may present in the postpartum period. We present a case of a 34-year-old lady with severe pre-eclampsia at 31 weeks of gestation with diplopia presenting seven days post caesarean section...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28967305/orbitozygomatic-craniotomy-and-trans-sylvian-approach-for-resection-of-a-tuberculum-sella-meningioma-with-extension-to-the-posterior-fossa
#13
Georgios Klironomos, Amir R Dehdashti
Tuberculum sella meningiomas can be approached through lateral approaches including pterional/orbitozygomatic craniotomies, frontobasal craniotomy, or through expanded endoscopic transsphenoidal approaches. The authors present the case of a 60-year-old male who presented with bitemporal hemianopia and significant right-side visual acuity compromise due to a large tuberculum sella meningioma. The tumor had an important extension to the posterior fossa. A right orbitozygomatic trans-sylvian approach was deemed most suitable to tackle the posterior extension of the tumor...
October 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28957727/measuring-the-impact-of-a-point-of-view-disability-simulation-on-nursing-students-empathy-using-the-comprehensive-state-empathy-scale
#14
Tracy Levett-Jones, Samuel Lapkin, Natalie Govind, Jacqueline Pich, Kerry Hoffman, Sarah Yeun-Sim Jeong, Carol Anne Norton, Danielle Noble, Lorna Maclellan, Melissa Robinson-Reilly, Naleya Everson
BACKGROUND: Although empathy is an integral component of professional practice and person-centred care, a body of research has identified that vulnerable patients groups frequently experience healthcare that is less than optimal and often lacking in empathy. AIM: The aim of this study was to examine the impact of an immersive point-of-view simulation on nursing students' empathy towards people with an Acquired Brain Injury. SETTING AND PARTICIPANTS: A convenience sample of 390 nursing students from a cohort of 488 participated in the study, giving a response rate of 80%...
December 2017: Nurse Education Today
https://www.readbyqxmd.com/read/28954971/incongruous-incomplete-homonymous-hemianopia-due-to-an-infarction-localized-to-the-lateral-geniculate-body
#15
Kanta Tanaka, Ikko Wada, Toshihiko Suenaga
A 45-year-old male was admitted with an acute-onset visual field defect. Goldmann perimetry revealed an incongruent, incomplete right homonymous hemianopia. The left eye showed a wedge-shaped, horizontal right hemianopia, whereas the right eye showed constriction of the right visual hemifield. MRI showed acute infarction localized to the left lateral geniculate body (LGB). LGB has a dual blood supply: from the anterior choroidal artery and from the lateral posterior choroidal artery (LPChA). The LPChA territory of LGB receives projection from the retinal area around the macula and horizontal meridian...
October 27, 2017: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/28932016/transcranial-direct-current-stimulation-tdcs-combined-with-blindsight-rehabilitation-for-the-treatment-of-homonymous-hemianopia-a-report-of-two-cases
#16
Barbara Maria Matteo, Barbara Viganò, Cesare Giuseppe Cerri, Roberto Meroni, Cesare Maria Cornaggia, Cecilia Perin
[Purpose] Homonymous hemianopia is one of the most common symptoms following neurologic damage leading to impairments of functional abilities and activities of daily living. There are two main types of restorative rehabilitation in hemianopia: "border training" which involves exercising vision at the edge of the damaged visual field, and "blindsight training," which is based on exercising the unconscious perceptual functions deep inside the blind hemifield. Only border effects have been shown to be facilitated by transcranial direct current stimulation (tDCS)...
September 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28925742/visual-search-performance-in-patients-with-vision-impairment-a-systematic-review
#17
Cassia Senger, Maria Rita Rodrigues Alves Margarido, Carlos Gustavo De Moraes, Ligia Issa De Fendi, André Messias, Jayter Silva Paula
PURPOSE: Patients with visual impairment are constantly facing challenges to achieve an independent and productive life, which depends upon both a good visual discrimination and search capacities. Given that visual search is a critical skill for several daily tasks and could be used as an index of the overall visual function, we investigated the relationship between vision impairment and visual search performance. METHODS: A comprehensive search was undertaken using electronic PubMed, EMBASE, LILACS, and Cochrane databases from January 1980 to December 2016, applying the following terms: "visual search", "visual search performance", "visual impairment", "visual exploration", "visual field", "hemianopia", "search time", "vision lost", "visual loss", and "low vision"...
November 2017: Current Eye Research
https://www.readbyqxmd.com/read/28924292/hemimegalencephaly-with-intractable-epilepsy-a-case-report
#18
Prem Chand, Muhammad Faraz Raghib, Muhammad Sohail Salat, Fazal Manzoor Arain
Isolated Hemimegalencephaly (iHME) is a rare form of congenital malformation of cortical development.It is characterized by enlargement of all or part of one cerebral hemisphere. It typically presents with intractable seizures, mental retardation, developmental delay, contralateral hemiparesis and hemianopia. The patient was a five and half month's old baby girl who presented first with focal seizures at 10th day of life. No other physical or behavioral abnormality was noted. However, Initial EEG showed excessive sharp EEG transients more over the right hemisphere, repeated EEG showed spikes, polyspikes, sharps and slow wave discharges predominately over right hemisphere...
September 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28921047/child-dermoid-cyst-mimicking-a-craniopharyngioma-the-benefit-of-mri-t2-weighted-diffusion-sequence
#19
Aymeric Amelot, Alin Borha, Raphael Calmon, Patrick Barbet, Stephanie Puget
BACKGROUND: Brain dermoid cysts are very rare lesions. Although benign, these cysts may be associated with devastating complications due to mass effect or meningitis. The discovery of completely asymptomatic dermoid cysts in the pediatric population is exceedingly rare. Despite the advances in imaging modalities, it sometimes remains difficult to exclude the differential diagnosis of craniopharyngioma. CASE REPORT: We describe a 12-year-old boy addressed for suspicion of craniopharyngioma diagnosed by decreased visual acuity, bitemporal hemianopia and a CT scan showing a large hypodense suprasellar lesion with intralesional calcifications...
September 18, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28912694/from-cortical-blindness-to-conscious-visual-perception-theories-on-neuronal-networks-and-visual-training-strategies
#20
REVIEW
Vanessa Hadid, Franco Lepore
Homonymous hemianopia (HH) is the most common cortical visual impairment leading to blindness in the contralateral hemifield. It is associated with many inconveniences and daily restrictions such as exploration and visual orientation difficulties. However, patients with HH can preserve the remarkable ability to unconsciously perceive visual stimuli presented in their blindfield, a phenomenon known as blindsight. Unfortunately, the nature of this captivating residual ability is still misunderstood and the rehabilitation strategies in terms of visual training have been insufficiently exploited...
2017: Frontiers in Systems Neuroscience
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