論文 - 松村 内久
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Neural representation of real place in the monkey hippocampal formation 査読あり
Etsuro Hori, Eiichi Tabuchi, Ryoi Tamura, Satoshi Eifuku, Nobuhisa Matsumura, Hisao Nishijo, Taketoshi Ono
Neuroscience Research 38 S76 - S76 2000年
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An experimental model for side-to-side microvascular anastomosis. 査読あり 国際誌
Nobuhisa Matsumura, Shunro Endo, Hideo Hamada, Masanori Kurimoto, Yutaka Hirashima, Akira Takaku
Journal of reconstructive microsurgery 15 ( 8 ) 581 - 3 1999年11月
担当区分：筆頭著者, 責任著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
Side-to-side microvascular anastomosis may be required in certain clinical situations, although the technique is difficult and the incidence of usage remains low. A new experimental model using rat femoral vessels for side-to-side microvascular anastomosis is presented, in which 100 percent patency was accomplished immediately and was maintained for 7 days after anastomosis. This model can provide a training tool for acquisition of advanced microsurgical technique for side-to-side anastomosis of small vessels.
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Spatial- and task-dependent neuronal responses during real and virtual translocation in the monkey hippocampal formation. 査読あり 国際誌
Nobuhisa Matsumura, Hisao Nishijo, Ryoi Tamura, Satoshi Eifuku, Shunro Endo, Taketoshi Ono
The Journal of neuroscience : the official journal of the Society for Neuroscience 19 ( 6 ) 2381 - 93 1999年03月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
Neuropsychological data in humans demonstrated a pivotal role of the medial temporal lobe, including the hippocampal formation (HF) and the parahippocampal gyrus (PH), in allocentric (environment-centered) spatial learning and memory. In the present study, the functional significance of the monkey HF and PH neurons in allocentric spatial processing was analyzed during performance of the spatial tasks. In the tasks, the monkey either freely moved to one of four reward areas in the experimental field by driving a cab that the monkey rode (real translocation task) or freely moved a pointer to one of four reward areas on the monitor (virtual translocation task) by manipulating a joystick. Of 389 neurons recorded from the monkey HF and PH, 166 had place fields that displayed increased activity in a specific area in the experimental field and/or on the monitor (location-differential neurons). More HF and PH neurons responded in the real translocation task. These neurons had low mean spontaneous firing rates (0.96 spikes/sec), similar to those of rodent HF place cells. The remaining nonresponsive neurons had significantly higher mean firing rates (8. 39 spikes/sec), similar to interneurons or theta cells in the rodent HF. Furthermore, most location-differential neurons showed different responses in different tasks. These results suggest that the HF and PH are crucial in allocentric information processing and, moreover, that the HF can encode different reference frames that are context or task-dependent. This may be the neural basis of episodic memory.
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Intracranial germinoma associated with Down's syndrome. Report of 2 cases. 査読あり 国際誌
Nobuhisa Matsumura, Masanori Kurimoto, Shunro Endo, Osamu Fukuda, Akira Takaku
Pediatric neurosurgery 29 ( 4 ) 199 - 202 1998年10月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
It is well known that Down's syndrome is sometimes associated with leukemia. However, there have been only a few case reports of a relationship between Down's syndrome and brain tumors. We report 2 cases with histological diagnoses of germinoma. The 1st case was a 10-year-old boy with Down's syndrome complaining of seizure and left hemiparesis. Computed tomographic (CT) scan and magnetic resonance imaging (MRI) showed a mass lesion in the right basal ganglia and thalamus. Histological examination indicated two cell pattern germinomas. The 2nd case was a 20-year-old man with Down's syndrome complaining of headache and vomiting. CT scan and MRI showed a pineal region tumor with marked hydrocephalus. Surgical specimens showed typical germinoma. Only 13 cases of brain tumors associated with Down's syndrome have been reported. A higher incidence of germ cell tumors seems to be related to chromosomal abnormalities.
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Monkey hippocampal neurons respond task-dependently during real and virtual navigation in tasks 査読あり
Nobuhisa Matsumura, Hisao Nishijo, Ryoi Tamura, Satoshi Eifuku, Akira Takaku, Taketoshi Ono
Neuroscience Research 31 S232 - S232 1998年01月
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Pyogenic osteomyelitis of an invaginated odontoid process with rapid deterioration of high cervical myelopathy: a case report. 査読あり 国際誌
M Kurimoto, S Endo, M Ohi, Y Hirashima, N Matsumura, A Takaku
Acta neurochirurgica 140 ( 10 ) 1093 - 4 1998年
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Surgically resected brain stem cavernous angioma in an infant. 査読あり 国際誌
Shunro Endo, Nobuhisa Matsumura, Masanori Kurimoto, Akira Takaku
Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery 13 ( 11-12 ) 613 - 5 1997年
記述言語：英語 掲載種別：研究論文（学術雑誌）
An infantile case of surgically resected brain stem cavernous angioma is presented. This 21-month-old boy was admitted to our department after repeated severe pontine hemorrhage. A deeplying lesion with hematoma was successfully removed via the IV ventricle approach. Few infantile cases of this lesion have been presented previously, and the approaches to brain stem cavernous angiomas in infants are discussed.