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Your search keyword '"Kenji Ohtsuka"' showing total 6 results
Start Over Author "Kenji Ohtsuka" Journal ophthalmologica
6 results on '"Kenji Ohtsuka"'

1. Radiographic Features of an Aneurysmal Bone Cyst of the Orbit

Author

Motomichi Sakata, Masato Hashimoto, Kenji Ohtsuka, and Nozomi Hino

Subjects
Male, medicine.medical_specialty, genetic structures, Radiography, Computed tomography, Lesion, Orbital Diseases, Exophthalmos, Humans, Medicine, cardiovascular diseases, medicine.diagnostic_test, business.industry, Infant, Magnetic resonance imaging, General Medicine, Aneurysmal bone cyst, medicine.disease, Magnetic Resonance Imaging, eye diseases, Sensory Systems, Bone Cysts, Aneurysmal, Ophthalmology, Solitary lesion, Frontal bone, medicine.anatomical_structure, cardiovascular system, Radiology, medicine.symptom, Tomography, X-Ray Computed, business, Orbit, Orbit (anatomy)
Abstract

Aneurysmal bone cyst is an unusual benign solitary lesion of bone occurring rarely in the orbit. In this report, we present computed tomography and magnetic resonance images of an orbital aneurysmal bone cyst involving the frontal bone in a 16-month-old boy. The aneurysmal bone cyst exhibited bone destruction, new bone formation of the orbital roof and fluid-fluid levels in the lesion following hemorrhage. These radiographic features may be useful for diagnosing orbital aneurysmal bone cysts.

Published
1998
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2. Convergence Paralysis after Lesions of the Cerebellar Peduncles

Author

M Sawa, H Maekawa, and Kenji Ohtsuka

Subjects
Adult, Male, medicine.medical_specialty, Cerebellum, genetic structures, Eye disease, Stimulus (physiology), Cerebellar Diseases, Ophthalmology, Oculomotor Nerve Diseases, Saccades, Humans, Medicine, Cerebral Hemorrhage, business.industry, Accommodation, Ocular, Fusional vergence, Eye movement, General Medicine, Anatomy, Convergence, Ocular, medicine.disease, Magnetic Resonance Imaging, Pursuit, Smooth, eye diseases, Sensory Systems, medicine.anatomical_structure, Wedge prism, Exotropia, sense organs, business, Accommodation
Abstract

We studied vergence eye movements in a patient with limited hemorrhage affecting the right cerebellar peduncles and the hemisphere. The patient showed exotropia of 30 prism dptr during near vision. Some vergence paradigms were investigated in this patient. We studied fusional vergence evoked by placing a wedge prism before one eye. Accommodative vergence was studied by blur stimulus using a servocontrolled optometer. Lens accommodation was also recorded during blur stimulus. Although accommodative responses were normal, accommodative vergence was almost absent as well as fusional convergence in this patient. It has previously been reported that the cerebellum has a role in the control of vergence in the monkey. Our data suggest that the human cerebellum also relates to the control of vergence.

Published
1993
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3. Contents Vol. 203, 1991

Author

Tomoaki Usui, Hiroshi Takahashi, S. Behrendt, Haruki Abe, A. Chetri, Hiroshi Maekawa, Hiroshi Furukawa, Shoji Tsuji, Edilson Kruger-Leite, P. Othenin-Girard, Christian Messmer, M. Fioretto, G. Hasenfratz, Takashi Nakagawa, Elizabeth W. Larson, C. Balacco-Gabrieli, Ken Nagaya, H. Bernsmeier, A. Cucinotta, Osamu Katsumi, Young-Hoon Ohn, Tadashi Miyatake, Tatsuo Hirose, Carl P. Herbort, F. Daxecker, R. Appolloni, Anselm Kampik, Josef Flammer, Yasuo Igarashi, Kazuo Iwata, S. Leopardi, Mineo Takagi, Kenji Ohtsuka, Tsunekazu Hamada, J. Schwoerer, Azusa Fukui, G P Fava, C. Burtolo, G. Randzio, Shinobu Akiya, and W. Mayer

Subjects
Ophthalmology, General Medicine, Sensory Systems
Published
1991
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4. Contents Vol. 217, 2003

Author

Sinan Tatlipinar, Hedwig J. Kaiser, Gokhan Kerci, Cem Yildirim, Maurício Abujamra Nascimento, Calliope Economou-Stamatelopoulou, B.S. Menon, S. Hoerle, D.L. Kayembe, Laxman S. Arya, Subhash Dadeya, D.E. Lysebo, Timo Haufschild, Akira Matsuda, Turgut Yilmaz, Supriyo Ghose, Jörg C. Schmidt, Shinobu Takeuchi, Sevda Arık, Josef Flammer, Moriaki Kusakabe, Noriko Hiraiwa, John C. Prouskas, R. Autrata, David Leonardo Cruvinel Isaac, Marcelo Torigoe, Mandeep Bajaj, Mustafa Özbaran, Shuichi Yamamoto, Sidney G. Shaw, J.-C. Mwanza, Kenji Ohtsuka, T. Tylleskär, Volkan Yaylali, Serap Özden, Michael Apostolopoulos, S.C. Reddy, Tansu Erakgün, Jale Menteş, D. Tshala-Katumbay, N. Jackson, Neelam Pushker, Filiz Afrashi, Peter Kroll, J. Rehurek, Alka Rani, Carsten H. Meyer, E.B. Rodrigues, P. Kroll, Sanem Nalbantgil, A. Şahap Kükner, R. Balasubramanya, Yoshinori Mitamura, Serdal Çelebi, L.K. Nyamabo, Newton Kara-José, Vinícius Coral Ghanem, İbrahim Demirlenk, G.T. Plant, Fatih Ulaş, George P. Roussopoulos, Orhan Aydemir, C.H. Meyer, Eduardo B. Rodrigues, Teiko Yamamoto, and J.C. Schmidt

Subjects
Ophthalmology, General Medicine, Sensory Systems
Published
2003
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5. Subject Index Vol. 217, 2003

Author

B.S. Menon, Laxman S. Arya, E.B. Rodrigues, P. Kroll, A. Şahap Kükner, R. Balasubramanya, Eduardo B. Rodrigues, Teiko Yamamoto, Jörg C. Schmidt, Vinícius Coral Ghanem, D. Tshala-Katumbay, Fatih Ulaş, Timo Haufschild, Kenji Ohtsuka, S.C. Reddy, Noriko Hiraiwa, Supriyo Ghose, John C. Prouskas, Tansu Erakgün, D.E. Lysebo, C.H. Meyer, İbrahim Demirlenk, Calliope Economou-Stamatelopoulou, G.T. Plant, Yoshinori Mitamura, J.C. Schmidt, Michael Apostolopoulos, S. Hoerle, T. Tylleskär, Mustafa Özbaran, D.L. Kayembe, Subhash Dadeya, Akira Matsuda, Sinan Tatlipinar, George P. Roussopoulos, Hedwig J. Kaiser, Mandeep Bajaj, Maurício Abujamra Nascimento, Gokhan Kerci, Orhan Aydemir, Sevda Arık, Jale Menteş, David Leonardo Cruvinel Isaac, J.-C. Mwanza, Josef Flammer, Turgut Yilmaz, J. Rehurek, Carsten H. Meyer, N. Jackson, Volkan Yaylali, Moriaki Kusakabe, Shinobu Takeuchi, Shuichi Yamamoto, L.K. Nyamabo, Sanem Nalbantgil, Neelam Pushker, Filiz Afrashi, Alka Rani, Sidney G. Shaw, Newton Kara-José, Cem Yildirim, Serdal Çelebi, Marcelo Torigoe, Serap Özden, R. Autrata, and Peter Kroll

Subjects
Ophthalmology, Index (economics), Statistics, Subject (documents), General Medicine, Sensory Systems, Mathematics
Published
2003
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6. Nonvisual Eye Position Control in a Patient with Ocular Lateropulsion

Author

Kenji Ohtsuka, Masahiro Sawa, Seiji Matsuda, Alejandra Uno, and Makoto Takeda

Subjects
Male, medicine.medical_specialty, Eye Movements, genetic structures, Eye disease, Fixation, Ocular, Tonic (physiology), Physical medicine and rehabilitation, Dysmetria, mental disorders, Reaction Time, Saccades, medicine, Humans, Lateral Medullary Syndrome, Vision, Ocular, Eye movement, General Medicine, Intracranial Embolism and Thrombosis, Middle Aged, medicine.disease, eye diseases, Sensory Systems, Saccadic masking, Long latency, Surgery, Ophthalmology, Eye position, Fixation (visual), sense organs, Psychology
Abstract

For elucidating the nonvisual eye position control system, we studied the accuracy of saccades toward the remembered position (memory-guided saccades) in a patient with ocular lateropulsion having tonic bias of the eye position. Although the saccadic dysmetria caused by ocular lateropulsion was recorded during memory-guided saccades in the same manner as visually guided saccades, the eyes reached precisely the intended position by corrective saccades. The mean latency of corrective saccades was significantly longer than that of corrective saccades observed for visually guided saccades. This long latency of corrective saccades supports the assumption that feedback information of the eye position is a signal generated by orbital afferents rather than a copy of the motor command.

Published
1988
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