Neuromuscular organization of avian flight muscle: Morphology and contractile properties of motor units in the pectoralis (pars thoracicus) of pigeon (Columba livia)

Journal of Morphology
A SokoloffG E Goslow

Abstract

We used acid digestion and glycogen depletion to determine fascicle organization, fiber morphology, and physiological and anatomical features of individual motor units of an in-series muscle, the pectoralis (pars thoracicus) of the pigeon (Columba livia). Most fascicles are attached at one end to connective tissue. Average fiber length in the four regions examined range from 42% to 66% of average fascicle length. More than 65% of fibers are blunt at one end of a fascicle and taper intrafascicularly. Fibers with blunt-blunt endings range from 13% to 31% of the population in different regions; taper-taper fibers range from 2% to 17%. Pigeon pectoralis fibers are distinguished histochemically into fast-twitch glycolytic (FG) and fast-twitch oxidative-glycolytic (FOG) populations. Three units composed of FG fibers (FG units) contract more quickly than three units composed of FOG fibers (FOG units) (range 31-37 vs 47-62 msec), produce more tetanic force (0.11-0.32 vs 0.02-0.05 N) and are more fatigable (<18% initial force vs >50% after repeated stimulation). Most motor units are confined to one of the four muscle regions. Territory of two FOG units is <30% of parent fascicle length. Territories of other units spanned parent fascicle...Continue Reading

References

Feb 1, 1978·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·M M Mesulam
May 1, 1977·Journal of Neurophysiology·R E BurkeB Walmsley
Jan 1, 1992·Anatomy and Embryology·A Maier
Apr 1, 1992·Journal of Morphology·J A TrotterA S Gaunt
Jul 1, 1991·Journal of Neurobiology·M OunjianV R Edgerton
Jun 22, 1990·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·A S Gaunt, C Gans
Aug 14, 1990·Neuroscience Letters·F Emonet-DénandU Proske
Apr 1, 1988·Journal of Neurophysiology·A Lev-TovR E Burke
Oct 1, 1988·Muscle & Nerve·H P Clamann, T B Schelhorn
Feb 1, 1987·Journal of Neurophysiology·J A HofferC A Pratt
Nov 1, 1973·The Journal of Physiology·R E BurkeF E Zajac
Nov 1, 1980·Journal of Morphology·J C McDonaghD G Stuart
Oct 1, 1995·Muscle & Nerve·R R RoyV R Edgerton
Oct 1, 1994·Journal of Neurophysiology·E SmitsF J Richmond
Mar 1, 1993·The Anatomical Record·E EldredV R Edgerton
Apr 1, 1993·Journal of Morphology·M I Heron, F J Richmond
Jan 1, 1965·Journal of Neurophysiology·A M MCPHEDRANE HENNEMAN
Jan 1, 1993·Journal of Morphology·Abbot S Gaunt, Carl Gans
Oct 1, 1993·Journal of Morphology·Dona F Boggs, Kenneth P Dial

❮ Previous
Next ❯

Citations

Feb 27, 2017·The Journal of Experimental Biology·Nicolai KonowSharon M Swartz
Jul 12, 2013·Animal : an International Journal of Animal Bioscience·Y M ChoiK Lee
Sep 22, 2000·Microscopy Research and Technique·E Bandman, B W Rosser
May 3, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·J R Lovvorn
May 15, 2001·Critical Reviews in Oral Biology and Medicine : an Official Publication of the American Association of Oral Biologists·T M van Eijden, S J Turkawski
Jun 19, 2001·Muscle & Nerve·R J MontiV R Edgerton
Oct 1, 2011·The Journal of Experimental Biology·Jennifer A CarrRichard L Marsh
Jan 1, 2008·The Journal of Experimental Biology·Bret W Tobalske, Andrew A Biewener
Feb 8, 2005·The Journal of Experimental Biology·Arya SomanAndrew A Biewener
Feb 26, 2008·The Journal of Hand Surgery·Samuel O Poore
Jan 24, 2009·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Kenneth C Welch, Douglas L Altshuler

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.