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 (pĕr′ə-mĭzh′ē-əm, -mĭz′ē-əm)
n. pl. per·i·my·si·a (-mĭzh′ē-ə, -mĭz′ē-ə)
The sheath of connective tissue enveloping bundles of muscle fibers.

[New Latin : peri- + Greek mūs, muscle; see mūs- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -ia (-ɪə)
(Anatomy) anatomy the sheath of fibrous connective tissue surrounding the primary bundles of muscle fibres
[C19: from peri- + -mysium, from Greek mus muscle]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌpɛr əˈmɪz i əm, -ˈmɪʒ-)

n., pl. -my•si•a (-ˈmɪz i ə, -ˈmɪʒ-)
the connective tissue surrounding bundles of skeletal muscle fibers.
[1835–45; irreg. from peri- + Greek mŷs mouse, muscle (compare myo-) + -ium2]
per`i•my′si•al, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.perimysium - the sheath of connective tissue that covers a bundle of muscle fibers
connective tissue - tissue of mesodermal origin consisting of e.g. collagen fibroblasts and fatty cells; supports organs and fills spaces between them and forms tendons and ligaments
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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References in periodicals archive ?
Notably, there were six L-CMD patients who showed muscular dystrophic change with multifocal inflammatory cell infiltration in the endomysium or in the perivascular region of the perimysium (patients No.
Also, alkaline phosphatase staining of the perimysium was suggestive of an immune disorder.
The myopathic lesions have been shown to include multiple rounded muscle fibers with internalized nuclei [2,4,22] coupled with a diffuse thickening of endomysium and perimysium and loose collagen-rice connective tissue separating muscle fibers [6,8,22].
Meat tenderness originates in structural and biochemical properties of skeletal muscle fibres, especially myofibrils and intermediate filaments, and of the intramuscular connective tissue, (the endomysium and perimysium), which are composed of collagen fibrils and fibers.
Irisin is secreted mainly in skeletal muscle, especially in the perimysium, endomysium, and nuclear parts, albeit adipose tissue, pancreas, sebaceous glands, and cardiac muscle have been identified as secretory tissues.
Unlike the transmission of EMG signals from the nerve action potential to the skin, this technology reads the vibrations produced from the friction of muscle fibers and the perimysium during muscle contractions.
(2011) reported that decrease of muscle stiffness was caused by increasing the flexibility and movement of the aponeurosis and the connective tissue, e.g., endomysium, perimysium, and epimysium, instead of lengthening muscle fiber.
Both DMD and DGR present progressive clinical signs and severe myopathy with initial fiber necrosis and regeneration associated with connective tissue proliferation in the endomysium and perimysium (VALENTINE et al., 1990,; MIJAZATO et al., 2011b; KORNEGAY et al., 2012).
Changes to the viscosity of HA causes densification of tissue and can modify the function of fascia, nerve receptors, muscle layers (epimysium and perimysium gliding) and hydrodynamic properties of connective tissue.
Muscle fiber necrosis and regeneration and mild inflammatory cell infiltration in the perivascular region of perimysium can be observed.
Caption: Figure 2: Transverse (a) and longitudinal (b) hematoxylin and eosin-stained histologic sections showing an infiltrate of intermediate-sized to large lymphoid cells in the endomysium between muscle fibers and the perimysium investing the fascicles or bundles of these fibers; these slides were prepared from the gluteal muscle biopsy of the 17-year-old boy described in case 1.