Contractile properties of single permeabilized muscle fibers from congenital cleft palates and normal palates of Spanish goats.

Contractile properties of single permeabilized muscle fibers from congenital cleft palates and normal palates of Spanish goats. Research Abstract Details 

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Contractile properties of single permeabilized muscle fibers from congenital cleft palates and normal palates of Spanish goats. Abstract Text:

Michael C Hanes,Jeffrey Weinzweig,William M Kuzon,Kip E Panter,Steven R Buchman,John A Faulkner,Deborah Yu,Paul S Cederna,Lisa M Larkin,

BACKGROUND: Analysis of the composition of muscle fibers constituent to a cleft palate could provide significant insight into the cause of velopharyngeal inadequacy. The authors hypothesized that levator veli palatini muscle dysfunction inherent to cleft palates could affect the timing and outcome of cleft palate repair. METHODS: Single, permeabilized muscle fibers from levator veli palatini muscles of three normal (n = 19 fibers) and three chemically induced congenital cleft palates (n = 21 fibers) of 14-month-old goats were isolated, and contractile properties were evaluated. The maximum isometric force and rate constants of tension redevelopment (ktr) were measured, and the specific force and normalized power were calculated for each fiber. RESULTS: The ktr measures indicate that cleft fibers are predominantly fast-fatigable; normal fibers are slow fatigue-resistant: after a 10-minute isometric contraction, fibers from cleft palates had a loss of force 16 percent greater than that from normal palates (p = 0.0001). The cross-sectional areas of the fibers from cleft palates (2750 +/- 209 microm2) were greater (p = 0.05) than those from normal palates (2226 +/- 143 microm2). Specific forces did not differ between the two groups. Maximum normalized power of fibers from cleft palates (11.05 +/- 1.82 W/l) was greater (p = 0.0001) than fibers from normal palates (1.60 +/- 0.12 W/l). CONCLUSIONS: There are clear physiologic differences in single muscle fibers from cleft palates and normal palates: cleft palate fibers are physiologically fast, have greater fatigability, and have greater power production. Detection of functional and/or fiber type differences in muscles of cleft palates may provide preoperative identification of a patient's susceptibility to velopharyngeal inadequacy and permit early surgical intervention to correct this clinical condition.

Contractile properties of single permeabilized muscle fibers from congenital cleft palates and normal palates of Spanish goats. Publishing Authors By Initials

MC Hanes,J Weinzweig,WM Kuzon,KE Panter,SR Buchman,JA Faulkner,D Yu,PS Cederna,LM Larkin,

For similar investigative techniques: epidemiologic methods: statistics as topic: statistics, nonparametric research abstracts see: investigative techniques: epidemiologic methods: statistics as topic: statistics, nonparametric research

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Contractile properties of single permeabilized muscle fibers from congenital cleft palates and normal palates of Spanish goats. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Plastic and reconstructive surgery

VOLUME: 119

Page Numbers: 1685-94

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ISSN: 1529-4242

DAY: 3

MONTH: May

YEAR: 2007

Contractile properties of single permeabilized muscle fibers from congenital cleft palates and normal palates of Spanish goats. Information

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LANGUAGE: eng

NlmUniqueID: 1306050

Contractile properties of single permeabilized muscle fibers from congenital cleft palates and normal palates of Spanish goats. Keywords Mesh Terms:

KEYWORDS: Statistics, Nonparametric

MESH TERMS: physiology

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Grant and Affiliation Information for Contractile properties of single permeabilized muscle fibers from congenital cleft palates and normal palates of Spanish goats.

AFFILIATION: Section of Plastic Surgery, Division of Geriatric Medicine, and Institute of Gerontology, University of Michigan, Ann Arbor, MI 48109-2007, USA.

Country: United States

AGENCY: United States NIDDK

GRANT: T90 DK-070071

ACRONYM: DK

MEDLINETA: Plast Reconstr Surg

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