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Homonymous hemianopia

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https://www.readbyqxmd.com/read/29201538/vision-in-stroke-cohort-profile-overview-of-visual-impairment
#1
Fiona J Rowe
Aim: To profile the full range of visual disorders from a large prospective observation study of stroke survivors referred by stroke multidisciplinary teams to orthoptic services with suspected visual problems. Methods: Multicenter prospective study undertaken in 20 acute Trust hospitals. Standardized screening/referral forms and investigation forms documented data on referral signs and symptoms plus type and extent of visual impairment. Results: Of 1,345 patients referred with suspected visual impairment, 915 were recruited (59% men; mean age at stroke onset 69 years [SD 14])...
November 2017: Brain and Behavior
https://www.readbyqxmd.com/read/29196364/lesson-of-the-month-2-use-of-thrombolysis-for-ischaemic-stroke-in-pregnancy-a-case-report-and-review-of-literature
#2
Asim Khan, Paris Hosseini, Branimir Nevajda, Sami Khan
A nine-week pregnant 33-year-old female presented with sudden-onset right-sided hemiparesis, hemisensory loss, dysarthria and homonymous hemianopia. She was known to have eleven previous miscarriages and used recreational drugs. A CT-head was unremarkable. The patient was subsequently diagnosed with an acute thromboembolic infarct and chose alteplase after counselling. During thrombolysis an ultrasound identified a foetus with no concerning features.  A post-thrombolysis CT revealed a left-sided posterior cerebral infarct...
December 2017: Clinical Medicine: Journal of the Royal College of Physicians of London
https://www.readbyqxmd.com/read/29075905/vertebrobasilar-dolichoectasia-causing-homonymous-hemianopia-a-case-report-and-review-of-the-literature
#3
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
#4
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/29018750/management-of-diplopia-with-visual-field-defects
#5
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
#6
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/28980562/-structural-retinal-and-optic-nerve-changes-in-patients-with-post-geniculate-visual-pathway-damage
#7
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/28954971/incongruous-incomplete-homonymous-hemianopia-due-to-an-infarction-localized-to-the-lateral-geniculate-body
#8
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
#9
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/28912694/from-cortical-blindness-to-conscious-visual-perception-theories-on-neuronal-networks-and-visual-training-strategies
#10
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
https://www.readbyqxmd.com/read/28735125/management-of-arteriovenous-malformations-associated-with-developmental-venous-anomalies-a-literature-review-and-report-of-2-cases
#11
Michael Zhang, Ian D Connolly, Mario K Teo, George Yang, Robert Dodd, Michael Marks, Mario Zuccarello, Gary K Steinberg
BACKGROUND: Classification of cerebrovascular malformations has revealed intermediary lesions that warrant further review owing to their unusual presentation and management. We present 2 cases of arteriovenous malformation (AVM) associated with a developmental venous anomaly (DVA), and discuss the efficacy of previously published management strategies. METHODS: Two cases of AVMs associated with DVA were identified, and a literature search for published cases between 1980 and 2016 was conducted...
October 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28723787/late-emergence-of-macular-sparing-in-a-stroke-patient-clinical-case-report
#12
Hye-Young Shin, So Hee Kim, Mee Yon Lee, Su Young Kim, Young Chun Lee
RATIONALE: Occlusive cerebrovascular disease is the most common cause of homonymous hemianopia (HH) with macular sparing. PATIENT CONCERNS: A 61-year-old man came to our ophthalmology clinic complaining of right-side hemianopia. Ophthalmic examination, visual field (VF) examination, and brain magnetic resonance imaging (MRI) were performed. DIAGNOSES: He had right HH without macular sparing on the initial VF test. And brain MRI 6 days after the visual symptoms began revealed a left occipital infarction...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28690938/alexia-without-agraphia-a-rare-entity
#13
Chintan Rupareliya, Syeda Naqvi, Seyedali Hejazi
Pure alexia refers to an acquired disorder associated with the damage to medial occipitotemporal gyrus in the dominant hemisphere, which is also known as visual word form area (VWFA). VWFA is involved in rapid word recognition and fluent reading. Alexia without agraphia is a disconnection syndrome that occurs when the splenium is also damaged with the occipital lobe on a dominant side. We report a case of a 72-year-old right-handed male who presented with alexia without agraphia accompanied by right homonymous hemianopia resulting from acute infarct of the left occipital lobe, the splenium of the corpus callosum and posterior thalamus that probably occurred on the previous day...
June 2, 2017: Curēus
https://www.readbyqxmd.com/read/28687871/chromatic-pupillography-in-hemianopia-patients-with-homonymous-visual-field-defects
#14
Fumiatsu Maeda, Carina Kelbsch, Torsten Straßer, Karolína Skorkovská, Tobias Peters, Barbara Wilhelm, Helmut Wilhelm
PURPOSE: The pupil light reflex is considered to be a simple subcortical reflex. However, many studies have proven that patients with isolated occipital lesions with homonymous hemianopia show pupillary hemihypokinesia. Our hypothesis is that the afferent pupillary system consists of two pathways: one via intrinsically photosensitive retinal ganglion cells (ipRGCs), the other running through the normal RGCs via the visual cortex. The purpose of this study was to test the hypothesis of these two separate pupillomotor pathways...
June 30, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28664028/a-case-of-acute-isolated-posterior-cerebral-artery-occlusion-successfully-treated-with-endovascular-clot-aspiration
#15
Taiki Yamamoto, Tomotaka Ohshima, Masaki Sato, Shunsaku Goto, Kojiro Ishikawa, Toshihisa Nishizawa, Shinji Shimato, Kyozo Kato
Posterior cerebral artery (PCA) strokes produce various symptoms. Therefore, the diagnosis is often delayed and patients arrive late for thrombolytic therapy. We report a case of acute isolated PCA occlusion that was successfully treated with endovascular clot aspiration. A 63-year-old man presented with right complete homonymous hemianopia. Diffusion-weighted image (DWI) showed a high-intensity area (HIA) in the occipital lobe, and magnetic resonance angiography (MRA) showed PCA occlusion. Emergency endovascular clot aspiration was performed immediately after the diagnosis...
April 2017: NMC Case Report Journal
https://www.readbyqxmd.com/read/28533131/don-t-get-off-the-track
#16
Rod Foroozan, Andrew G Lee
A 43-year-old man noted decreased vision after head trauma, with normal neuroimaging acutely. He had a left homonymous hemianopia, confirmed with hemifield visual evoked potentials, from trauma to the right optic tract. Four months after trauma, a magnetic resonance imaging of the brain showed atrophy of the right optic tract, and funduscopy revealed optic disk pallor with decreased retinal nerve fiber layer measures consistent with an optic tract syndrome.
May 19, 2017: Survey of Ophthalmology
https://www.readbyqxmd.com/read/28482268/the-role-of-the-environment-in-falls-among-stroke-survivors
#17
Jeffrey J Wing, James F Burke, Philippa J Clarke, Chunyang Feng, Lesli E Skolarus
BACKGROUND: Stroke survivors' risk of falls may be particularly sensitive to the environment due to deficits such as visuospatial neglect or homonymous hemianopia. We sought to identify the prevalence of falls among stroke survivors and investigate the possible role of the environment in falling. MATERIALS AND METHODS: Data from the National Health and Aging Trends Study (NHATS), a nationally representative population of community-dwelling adults over 65, were used...
September 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28458824/vertebral-artery-dissection-following-a-posterior-cervical-foraminotomy
#18
Aniruddha A Sheth, Stephen Honeybul
Vertebral artery dissection following a posterior cervical foraminotomy with rhizolysis of the subaxial spine has not been described before. A 46-year-old lady underwent the procedure for a left C6 radiculopathy with a focal disc herniation with no intraoperative complications. Seven hours post-operatively, she developed a right homonymous hemianopia, thalamic dysphasia, gait and memory impairment. Imaging demonstrated an occlusion to the left vertebral artery from C7/T1 to C4 with a dissection flap noted at the inferior margin...
February 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28348634/trans-synaptic-retrograde-degeneration-following-hemispherectomy-in-childhood
#19
Sian E Handley, Vasiliki S Panteli, Alki Liasis
Trans-synaptic retrograde degeneration (TRD) in the human visual system has been established. However there are few studies demonstrating macular thinning of the Retinal Ganglion cell Layer and/or Inner Plexiform layer (RGCL-IPL), corresponding to an acquired homonymous hemianopia. We report a 17 year old with a homonymous hemianopia, secondary to a hemispherectomy for intractable epilepsy. Three years following hemispherectomy, Optical Coherence Tomography (OCT) revealed evidence of TRD, corresponding to his complete homonymous hemianopia...
April 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/28237414/visual-function-20-years-after-childhood-hemispherectomy-for-intractable-epilepsy
#20
Sian E Handley, Faraneh Vargha-Khadem, Richard J Bowman, Alki Liasis
PURPOSE: To investigate visual function in adults post hemispherectomy in childhood. DESIGN: Noncomparative case series. METHODS: All participants underwent visual acuity, binocular function, visual field, optical coherence tomography (OCT) of the retinal nerve fiber layer (RNFL), and monocular pattern reversal visually evoked potentials (prVEP). PARTICIPANTS: Six adults who had a hemispherectomy in childhood (median 21...
May 2017: American Journal of Ophthalmology
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