Myosin heavy chain expression and muscle adaptation to chronic oral breathing in rat

Gelhaye, Mathieu; Martrette, Jean‐Marc; Legrand-Frossi, Christine; Trabalon, Marie

doi:10.1016/j.resp.2005.12.010

Cited by 21 publications

(27 citation statements)

References 42 publications

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“…Previous reports in rats have suggested that nasal obstruction is associated with reduced growth of the masseter muscle and anterior digastric muscle (Gelhaye et al, 2006). The complex activities performed during the orofacial behaviors are possible by the activity of the different muscles, and the masticatory muscles coordination is regulated by several reflexes, such as the jaw-opening reflex, and the jaw-closing reflex (Funaki et al, 2014) Based on this, we decided to investigate the JOR, which helps in the different activities performed in the craniofacial complex, especially in mastication.…”

Section: Discussionmentioning

confidence: 95%

“…Experimental studies have elucidated that nasal obstruction induces a significant reduction in the vertical development of the nasomaxillary complex and skull base along the longitudinal axis (Scarano et al, 1998). It also results in a significant reduction in the growth of the masseter and the anterior digastric (Dig) muscle (Gelhaye et al, 2006; Izu et al, 2010). With regard to masticatory function (Hsu and Yamaguchi, 2012; Ikenaga et al, 2013), previous studies have shown that oral breathing reduces masseter muscle activity (Ferla et al, 2008), and increases suprahyoid muscle activity and hypotonia of the lips and buccinator muscle (Valera et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Unilateral Nasal Obstruction during Later Growth Periods Affects Craniofacial Muscles in Rats

et al. 2017

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Nasal obstruction can occur at different life stages. In early stages of life the respiratory system is still under development, maturing during the growth period. Previous studies have shown that nasal obstruction in neonatal rats alters craniofacial function. However, little is known about the effects of nasal obstruction that develops during later growth periods. The aim of this study was to investigate the effects of nasal obstruction during later periods of growth on the functional characteristics of the jaw-opening reflex (JOR) and tongue-protruding muscles. In total, 102 6-day-old male Wistar rats were randomized into either a control or experimental group (both n = 51). In order to determine the appropriate timing of nasal obstruction, the saturation of arterial oxygen (SpO2) was monitored at 8 days, and at 3, 5, 7, 9, and 11 weeks in the control group. Rats in the experimental group underwent unilateral nasal obstruction at the age of 5 weeks. The SpO2 was monitored at 7, 9, and 11 weeks in the experimental group. The electromyographic responses of JOR and the contractile properties of the tongue-protruding muscles were recorded at 7, 9, and 11 weeks. In the control group, SpO2 decreased until 5 weeks of age, and remained relatively stable until 11 weeks of age. The SpO2 was significantly lower in the experimental group than in the control. In the experimental group, JOR changes included a longer latency and smaller peak-to-peak amplitude, while changes in the contractile properties of the tongue-protruding muscles included larger twitch and tetanic forces, and a longer half-decay time. These results suggest that nasal obstruction during later growth periods may affect craniofacial function.

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Unilateral Nasal Obstruction during Later Growth Periods Affects Craniofacial Muscles in Rats

et al. 2017

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“…Because of airway obstruction, a stronger diaphragm contraction happens, preceded by muscular action inspiratory accessory, shown by increased activity of the sternocleidomastoid muscle during nasal inspiration of children with mouth breathing 26 . Other authors found no significant changes among groups of mouth and nasal breathing in relation to the composition of the muscle fibers of the diaphragm, ie, this muscle was equivalent behavior in mouth and nasal breathers 25 .…”

Section: Discussionmentioning

confidence: 88%

“…The fact of not having found correlation between these variables can suggest that the transition from nasal breathing for mouth breathing induces changes in respiratory muscle structure, developing compensation strategies to live with the consequences of mouth breathing without the appearance of noticeable changes, favoring breathing 24,25 .…”

Section: Discussionmentioning

confidence: 99%

“…This means that the nasolabial lifters were more resistant to fatigue as they adapted to the new condition of mouth breathing, allowing the maintenance of functional position of these involved muscles in this function without altering the muscle activity and consequently without altering the nasal function (nasal inspiration and exhalation) 25 .…”

Section: Discussionmentioning

confidence: 99%

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Aeração nasal e força muscular respiratória em crianças respiradoras orais

Cunha

Bezerra

et al. 2015

Rev. CEFAC

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Resumo: OBJETIVO: observar se existe relação entre força muscular respiratória e área da aeração nasal em crianças respiradoras orais. MÉTODOS: trata-se de um estudo do tipo observacional, transversal comparativo entre dois grupos. Participaram 32 crianças com Respiração Oral secundária à rinite alérgica (21 meninos e 11 meninas) e 30 respiradoras nasais sem rinite alérgica (09 meninos e 21 meninas), 7 a 12 anos, submetidas à avaliação da aeração nasal com o espelho de Altmann e à avaliação da força muscular respiratória com o manovacuômetro digital (MVD(r)30). RESULTADOS: não houve correlação entre aeração nasal e força muscular respiratória em cada subgrupo. Houve diferença comparando-se valores das pressões expiratórias máximas entre meninos e meninas respiradores orais (p=0,0064) e entre meninos e meninas respiradores nasais (p=0,0030). Também houve diferença das pressões inspiratórias máximas entre meninos e meninas respiradores orais (p=0,0324) e entre meninos e meninas respiradores nasais (p=0,0210). CONCLUSÃO: não foi possível confirmar a relação entre a área de aeração nasal e a força muscular respiratória nos respiradores orais.

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Mother–pup interactions during a short olfactory deprivation period in young rats

Gelhaye¹,

Padzys

Olry³

et al. 2011

Developmental Psychobiology

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The effects of short-term bilateral naris occlusion (inducing olfactory deprivation) on mother-pup interactions, suckling behavior and hormonal status during post-natal development in Wistar rats were studied. Bilateral naris occlusion was performed on 8-day-old rat pups and its effects were evaluated at Day 9 and at Day 15. The narins opened spontaneously between Day 12 and 14. Olfactory-deprived pups exhibited a greater level of corticosterone at both ages versus untreated or sham animals. Olfactory deprivation via naris occlusion, in young rats, alters mother-pup interactions with a decrease in the duration of mother-pup retrieving and an increase in pup licking. Olfactory-deprived pups showed also a lower mean duration of nursing and a decrease in nipple attachment, which appeared related to difficulties in finding the nipple. Olfactory-deprived pups had difficulty recognizing their nest. These behavioral alterations were accompanied by a diminution in milk ingested and growth retardation associated with a reduced level of thyroxin at both 9 and 15 days of age.

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Myosin heavy chain expression and muscle adaptation to chronic oral breathing in rat

Cited by 21 publications

References 42 publications

Unilateral Nasal Obstruction during Later Growth Periods Affects Craniofacial Muscles in Rats

Unilateral Nasal Obstruction during Later Growth Periods Affects Craniofacial Muscles in Rats

Aeração nasal e força muscular respiratória em crianças respiradoras orais

Mother–pup interactions during a short olfactory deprivation period in young rats

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