Morphological and histochemical properties of tongue muscles in cat

Hellstrand, E.

doi:10.1111/j.1748-1716.1980.tb06650.x

Cited by 52 publications

(26 citation statements)

References 28 publications

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“…For example, the tongue of the feline and the rat appears to contain mainly fast contracting fibres [Hellstrand, 1980;Smith 1989;Prigozy et al, 1997;Sokoloff, 2000] whereas the macaque monkey [DePaul and Abbs, 1996] shows a fibre type pattern more in agreement with the present findings of the human tongue. Thus, in the monkey, the apex contains exclusively type II fibres, which gradually decrease in proportion towards the posterior regions.…”

Section: Discussionsupporting

confidence: 81%

Fibre Composition of Human Intrinsic Tongue Muscles

Stål

Marklund

Thornell

et al. 2003

Cells Tissues Organs

124

115

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The muscle fibre composition of three human intrinsic tongue muscles, the longitudinalis, verticalis and transversus, was investigated in four anterior to posterior regions of the tongue using morphological and enzyme- and immunohistochemical techniques. All three muscles typically contained type I, IIA and IM/IIC fibres. Type I fibres expressed slow myosin heavy chain (MyHC), type II fibres fast MyHC, mainly fast A MyHC, whereas type IM/IIC coexpressed slow and fast MyHCs. Type II fibres were in the majority (60%), but regional differences in proportion and diameter of fibre types were obvious. The anterior region of the tongue contained a predominance of relatively small type II fibres (71%), in contrast to the posterior region which instead showed a majority of larger type I and type IM/IIC fibres (66%). In general, the fibre diameter was larger in the posterior region. This muscle fibre composition of the tongue differs from those of limb, orofacial and masticatory muscles, probably reflecting genotypic as well as phenotypic functional specialization in oral function. The predominance of type II fibres and the regional differences in fibre composition, together with intricate muscle structure, suggest generally fast and flexible actions in positioning and shaping the tongue, during vital tasks such as mastication, swallowing, respiration and speech.

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Section: Discussionsupporting

confidence: 81%

Fibre Composition of Human Intrinsic Tongue Muscles

Stål

Marklund

Thornell

et al. 2003

Cells Tissues Organs

124

115

View full text Add to dashboard Cite

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“…VAN LUNTEREN and coworkers [3,4] reported that muscle fibres of pharyngeal dilator muscles such the genioglossus, geniohyoid, sternohyoid and sternothyroid showed fast contractile properties and resistance to fatigue. HELLSTRAND [11 ] found that the extrinsic muscles of the cat tongue contained 19±25% type I fibres and 75±81% type II fibres. Although they only used a histochemical approach, they found that fatiguable, fatigue-intermediate and fatigue-resistant fibres were present in equal proportions in the extrinsic tongue muscles of the cat.…”

Section: Discussionmentioning

confidence: 98%

Functional divergence of human genioglossus motor units with respiratory-related activity

Tsuiki¹,

Ono²,

Ishiwata³

et al. 2000

Eur Respir J

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The genioglossus muscle has at least two types of motor unit with respiratory-related activity. Inspiratory motor units show phasic activity during inspiration, whereas inspiratory/expiratory motor units show phasic inspiratory activity superimposed on tonic activity. The purpose of this study was to investigate the physiological roles of these different genioglossus motor units.The unitary activities of 12 inspiratory and 12 inspiratory/expiratory motor units were recorded using fine-wire electrodes during quiet nasal breathing in eight normal adult males. The mean interspike interval and the SD of successive spikes were calculated for inspiratory and inspiratory/expiratory motor units, respectively. Scattergrams of the mean interspike interval versus SD were constructed for the two groups of motor units.The effects of changes in head position on the firing activity and the patterns of distribution of the mean interspike interval versus SD were significantly different for inspiratory and inspiratory/expiratory motor units.These results suggest that the inspiratory and inspiratory/expiratory motor units have different functional roles in respiration; inspiratory motor units may be phasically active to counteract intraluminal negative pressure during inspiration, whereas inspiratory/expiratory motor units may be tonically active to maintain tongue posture. Eur Respir J 2000; 15: 906±910.

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“…The tongue and soleus in the rat are both oxidative muscles, and the rat tongue has a higher ATP/ADP ratio. The tongue is however a fast muscle (Hellstrand, 1979) …”

Section: Discussionmentioning

confidence: 99%

“…2, left row) was composed of about 10 0 type I fibres and a mixture of type IIA and IIB fibres. All type II fibres (Hellstrand, 1979 Fig. 1.…”

Section: Histochemical Characterization Of the Muscles Investigatedmentioning

confidence: 99%

The contents of high‐energy phosphates in different fibre types in skeletal muscles from rat, guinea‐pig and man.

Edström¹,

Hultman²,

Sahlin³

et al. 1982

The Journal of Physiology

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SUMMARY1. The contents of high-energy phosphates at rest have been measured in skeletal muscles with different fibre-type composition from rat, guinea-pig and man. All muscles studied biochemically have been characterized histochemically.2. Fast-twitch muscles had a higher ATP/ADP ratio than slow-twitch muscles and, with the exception of the tongue in the rat, higher contents of ATP and phosphocreatine.3. There was an inverse relationship between the content of phosphocreatine and the stainability for succinyl dehydrogenase, which is a marker enzyme for oxidative capacity.4. The biochemical and histochemical data are discussed in relation to known morphological and functional properties of the different muscle-fibre types. It is concluded that fast-twitch fibres have a high ATP/ADP ratio favouring a fast acceleration ofenergy production. The content ofphosphocreatine seems to be related to the glycolytic capacity but not to the contraction time. In addition to being an immediate energy source, phosphocreatine functions as a buffer against lactic acidosis.

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Morphological and histochemical properties of tongue muscles in cat

Cited by 52 publications

References 28 publications

Fibre Composition of Human Intrinsic Tongue Muscles

Fibre Composition of Human Intrinsic Tongue Muscles

Functional divergence of human genioglossus motor units with respiratory-related activity

The contents of high‐energy phosphates in different fibre types in skeletal muscles from rat, guinea‐pig and man.

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