| Project/Area Number |
05807079
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Radiation science
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| Research Institution | Keio University |
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Principal Investigator |
KOHDA Ehiichi Keio University, School of Med.Ass.Prof., 医学部, 講師 (80101989)
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| Co-Investigator(Kenkyū-buntansha) |
HISAZUMI Hiromi Keio University, School of Med., Follow, 医学部, 助手 (50238713)
OKUDA Shigeo Keio University, School of Med., Follow, 医学部, 助手 (30233456)
IKAWA Hiromichi Keio University, School of Med., Instructor, 医学部, 助手 (20124935)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1994: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1993: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | Anus / MRI / Anorectal Malformations / MRI / 画像診断 |
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| Research Abstract |
We evaluated the normal and abnormal functions of sphincter muscle complex at rest and squeeze using MRI.Under balloon stimulation, 71% of normal sphincter muscle complexes contracted only transverse dimension. The rest was as is. None revealed significant distension. All patients with continence demonstrated same transverse contraction. Patients with incontinence showed no significant contraction. Under enema stimulation for normal subjects, sphincter muscle complex distended on both dimensions. Gluteal muscle contracted 50% of volunteers, under enema stimulation. All post operative patients with continence demonstrated gluteal muscles contractions. In conclusions, normal sphincter muscle complex contracts only in transverse dimension under balloon stimulation. It is caused by the puborectal muscle. Under enema stimulation, it distended on both dimensions. Gluteal muscle contracted only under enema stimulation. In post operative patients, MRI shows different functions of anal shincter muscle complex between continent and incontinent groups. It may explain causes of incontinence. The gluteal muscle and puborectal muscle seem to have one of the essentials for continence.
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