scholarly journals Radical “Visual Capture” Observed in a Patient with Severe Visual Agnosia

2003 ◽  
Vol 14 (1-2) ◽  
pp. 47-53
Author(s):  
Akiko Takaiwa ◽  
Hirokazu Yoshimura ◽  
Hirofumi Abe ◽  
Satoshi Terai
Keyword(s):  
Cerebral Artery ◽  
Posterior Cerebral Artery ◽  
Daily Life ◽  
Brain Infarction ◽  
Visual Capture ◽  
Visual Agnosia ◽  
Touch Condition ◽  
Contradictory Information ◽  
Visual Deficit ◽  
Left Posterior

We report the case of a 79-year-old female with visual agnosia due to brain infarction in the left posterior cerebral artery. She could recognize objects used in daily life rather well by touch (the number of objects correctly identified was 16 out of 20 presented objects), but she could not recognize them as well by vision (6 out of 20). In this case, it was expected that she would recognize them well when permitted to use touch and vision simultaneously. Our patient, however, performed poorly, producing 5 correct answers out of 20 in the Vision-and-Touch condition. It would be natural to think that visual capture functions when vision and touch provide contradictory information on concrete positions and shapes. However, in the present case, it functioned in spite of the visual deficit in recognizing objects. This should be called radical visual capture. By presenting detailed descriptions of her symptoms and neuropsychological and neuroradiological data, we clarify the characteristics of this type of capture.

scholarly journals Left atrial myxoma causing posterior cerebral artery infarct-a case report

2017 ◽  
Vol 4 (6) ◽  
pp. 2070
Author(s):  
Sudesh Kumar ◽  
Shubhadev Bhattacharya ◽  
Narender S. Jhajhria ◽  
Vijay Kumar Gupta
Keyword(s):  
Case Report ◽  
Cerebral Artery ◽  
Left Atrial ◽  
Posterior Cerebral Artery ◽  
Atrial Myxoma ◽  
Visual Agnosia ◽  
Sudden Loss ◽  
Left Atrial Myxoma ◽  
Left Posterior ◽  
History Of

A 34-year-old female patient presented with a history of sudden loss of vision in right eye. On neurological examination, she was having visual agnosia in right eye. MRI was performed which revealed left posterior cerebral artery infarct. Trans thoracic echocardiography was performed. This showed a large left atrial myxoma. Patient underwent resection and had an uneventful postoperative course. This case report showed the importance of cardiac source of emboli in patients presenting as acute stroke. Performing echocardiography and diagnosing and treating cardiac source of emboli could prevent further complications.

scholarly journals Study of Posterior Cerebral Artery in Human Cadaveric Brain

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
S. A. Gunnal ◽  
M. S. Farooqui ◽  
R. N. Wabale
Keyword(s):  
Cerebral Artery ◽  
Basilar Artery ◽  
Posterior Cerebral Artery ◽  
Cerebral Arteries ◽  
Occipital Lobe ◽  
Common Trunk ◽  
Branching Pattern ◽  
Morphological Variations ◽  
Left Posterior ◽  
Mean Diameter

Objective. Basilar artery (BA) terminates in right and left posterior cerebral arteries (PCAs). Each PCA supplies respective occipital lobe of the cerebrum. The present study is designed to know the morphology, morphometry, branching pattern, and symmetry of PCA. Methods. The study included 340 PCAs dissected from 170 human cadaveric brains. Results. Morphological variations of P1 segment included, aplasia (2.35%), hypoplasia (5.29%), duplication (2.35%), fenestration (1.17%), and common trunk shared with SCA (1.76%). Morphological variations of origin of P2 segment included direct origin of it from BA (1.17%) and ICA (2.35%). Unusually, two P2 segments, each arising separately from BA and ICA, were observed in 1.17%. Unilateral two P2 segments from CW were found in 0.58%. Morphological variations of course of P2 were duplication (0.58%), fenestration (0.58%), and aneurysm (1.76%). Unilateral P2 either adult or fetal was seen in 4.71%. The group II branching pattern was found to be most common. Asymmetry of P2 was 40%. Morphometry of P2 revealed mean length of 52 mm and mean diameter of 2.7 mm. Conclusion. The present study provides the complete anatomical description of PCA regarding morphology, morphometry, symmetry, and its branching pattern. Awareness of these variations is likely to be useful in cerebrovascular procedures.

scholarly journals Association between patency of the circle of Willis and diabetes mellitus in patients with cerebral ischaemic stroke

2017 ◽  
Vol 45 (2) ◽  
pp. 723-732 ◽  
Author(s):  
Ying Chi ◽  
Zu-neng Lu
Keyword(s):  
Diabetes Mellitus ◽  
Magnetic Resonance ◽  
Ischaemic Stroke ◽  
Cerebral Artery ◽  
Basilar Artery ◽  
Patency Rate ◽  
Posterior Cerebral Artery ◽  
Brain Infarction ◽  
Posterior Communicating Artery ◽  
Patients With Diabetes

Objective To examine patency of the cerebral anterior and posterior communicating arteries in patients with ischaemic stroke with or without diabetes mellitus. Methods This retrospective study included patients with acute ischaemic stroke treated between July 2011 and May 2016. Cerebral infarction was evaluated by magnetic resonance imaging. Anterior and posterior communicating-artery patency was determined using magnetic resonance angiography. Vessels were defined as patent or occluded. Results Out of 1 406 patients, incidence of vertebral basilar artery brain infarction and posterior cerebral artery brain infarction were significantly higher in patients with diabetes versus those without diabetes (35.5% versus 22.3% and 11.7% versus 6.8%, respectively). Among patients with posterior cerebral artery brain infarction, anterior and posterior communicating-artery patency rates were higher in patients with diabetes versus those without diabetes (66.7 versus 23.5% and 33.3% versus 5.9% [bilateral], respectively). Among patients with vertebral basilar artery infarction and posterior cerebral artery P1 segment infarction, patency rate of the anterior communicating artery was higher in patients with diabetes versus those without diabetes (55.7% versus 45.9%). Conclusion Among patients with ischaemic stroke, patency rate of the circle of Willis may be higher in patients with diabetes than those without diabetes.

Pure arterial malformation of the posterior cerebral artery: importance of its recognition

2013 ◽  
Vol 119 (3) ◽  
pp. 655-660 ◽  
Author(s):  
Nancy McLaughlin ◽  
Radoslav Raychev ◽  
Gary Duckwiler ◽  
Neil A. Martin
Keyword(s):  
Cerebral Artery ◽  
Rare Case ◽  
Healthy Adult ◽  
Posterior Cerebral Artery ◽  
Vascular Anomaly ◽  
3D Images ◽  
Arteriovenous Fistulas ◽  
Left Posterior ◽  
Distinguishing Features ◽  
Arterial Malformation

The finding of dilated, elongated, and tortuous vessels on brain imaging should prompt clinicians to determine what vascular anomaly is present. Importantly, not all suspicious serpentine flow voids are manifestations of arteriovenous malformations or arteriovenous fistulas. Other types of intracranial vasculopathies should also be considered. The authors report a rare case of dilated, tortuous, and redundant left posterior communicating artery and left P2 segment of the posterior cerebral artery identified in a young healthy adult that remained stable over a 30-year period. Dynamic and 3D images were critical for determining the type of vascular anomaly and for guiding appropriate management. The authors propose that this case represents a pure arterial malformation and discuss its distinguishing features.

scholarly journals Multiple Spontaneous Intracranial-Extracranial Arterial Dissections in a Patient with Osteogenesis Imperfecta

2017 ◽  
Vol 2017 ◽  
pp. 1-3 ◽  
Author(s):  
Mehmet Kolukısa ◽  
Elif Gökçal ◽  
Azize Esra Gürsoy ◽  
Çiğdem Deniz ◽  
Ayşe Aralaşmak ◽  
...  
Keyword(s):  
Osteogenesis Imperfecta ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Posterior Cerebral Artery ◽  
Vascular Imaging ◽  
Left Vertebral Artery ◽  
Simultaneous Occurrence ◽  
Diffusion Weighted Mri ◽  
Left Posterior ◽  
The Right

A 40-year-old male with osteogenesis imperfecta (OI) was admitted to the hospital with an acute right monoparesis. Diffusion-weighted MRI showed infarction in the territory of the left anterior cerebral artery (ACA) and in the left posterior cerebral artery (PCA). In his vascular imaging, occlusion of the left vertebral artery (VA) starting from V2 segment was consistent with dissection and pseudoaneurysm in the right ACA. We presented this case because of the presence of spontaneous and simultaneous occurrence of both intracranial and extracranial arterial dissections in OI.

Spontaneous thrombosis of posterior cerebral artery aneurysm with angiographic reappearance

1993 ◽  
Vol 79 (3) ◽  
pp. 434-437 ◽  
Author(s):  
John L. D. Atkinson ◽  
John I. Lane ◽  
Harold J. Colbassani ◽  
D. Mark E. Llewellyn
Keyword(s):  
Mr Imaging ◽  
Cerebral Artery ◽  
Posterior Cerebral Artery ◽  
Brain Infarction ◽  
Artery Aneurysm ◽  
Parent Vessel ◽  
Spontaneous Thrombosis ◽  
Vessel Occlusion ◽  
Content Type ◽  
Parent Vessel Occlusion

✓ The case is presented of a 23-year-old man suffering ischemic brain infarction from spontaneous thrombosis of a left posterior cerebral artery P1–P2 junction aneurysm. Vasospasm and/or partial parent vessel occlusion were documented by magnetic resonance (MR) imaging and angiography. Repeat cerebral angiography and MR imaging 3 months later revealed patency of the posterior cerebral artery and luminal filling of a 1-cm fusiform aneurysm, which was successfully trapped at surgery.

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