Effects of a Liquid Diet on Temporomandibular Joint Mechano-receptors

Ishida, Takeshi; Yabushita, Tomohiro; Soma, Kunimichi

doi:10.1177/0022034508328626

Cited by 13 publications

(18 citation statements)

References 26 publications

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“…Also, the response properties of rat periodontal mechanoreceptors and temporomandibular joint mechanoreceptors attain maturation by the age of 5 weeks (Nasution et al, 2002; Ishida et al, 2009). Since each receptor of the trigeminal nerve endings complete maturation at 5 weeks of age, nasal obstruction at this point is expected to have a significant effect on the stomathognatic system.…”

Section: Discussionmentioning

confidence: 99%

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: 99%

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

et al. 2017

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“…The response properties of TMJ mechanoreceptors change in association with an altered masticatory environment such as low masticatory function. 16 For instance, a change in the consistency of food to a liquid diet has been reported to increase the physiologic response of the TMJ, resulting in a continuous decrease in the threshold of the TMJ units. 16 In this study, the threshold of TMJ units decreased during the first phase and then increased to the original level during the second phase.…”

Section: Discussionmentioning

confidence: 99%

“…16 For instance, a change in the consistency of food to a liquid diet has been reported to increase the physiologic response of the TMJ, resulting in a continuous decrease in the threshold of the TMJ units. 16 In this study, the threshold of TMJ units decreased during the first phase and then increased to the original level during the second phase. Although it appears as though the physiologic function of the TMJ was reduced during the first phase, it recovered to show a normal response during the second phase.…”

Section: Discussionmentioning

confidence: 99%

“…The recording electrode was inserted into the gasserian ganglion with reference to the stereotaxic coordinates 18 previously reported for the recording of single-unit activities of TMJ mechanoreceptors. [14][15][16] Electrical stimulation of the auriculotemporal nerve evoked responses with a latency of 0.125 6 0.01 millisecond in the nucleus of the gasserian ganglion. The conduction distance from the site of stimulation to the recording electrode in the gasserian ganglion was estimated to be 5.0 mm; therefore, the mean conduction velocity recorded in the afferents was 40.5 6 3.5 m/s, which indicates that these were probably large myelinated (Ab) fibers.…”

Section: Stimulation and Recordingmentioning

confidence: 99%

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Functional adaptability of temporomandibular joint mechanoreceptors after an increase in the occlusal vertical dimension in rats

Naito¹,

Ishida²,

Kokai³

et al. 2011

The Angle Orthodontist

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Objective: To investigate the effects of an experimentally-induced increase in the occlusal vertical dimension (iOVD) on the functional characteristics of temporomandibular joint (TMJ) mechanoreceptors in rats. Materials and Methods: Sixty 13-week-old male albino Wistar rats were divided into control and iOVD groups (30 animals each). The vertical dimension between the maxillary and mandibular molars in the iOVD group was increased by 2.0 mm with a build-up of resin on the maxillary molars. Single-unit activities of TMJ mechanoreceptors were evoked by passive jaw movement. Recording was performed from the gasserian ganglion 1 day and 1, 3, 5, 7, and 9 weeks after the establishment of iOVD. Results: Compared with the control group, the firing threshold was significantly lower at 1, 3, and 5 weeks after iOVD in the iOVD group. There were no significant differences in the firing threshold at 1 day, or 7 or 9 weeks. The maximum instantaneous firing frequency was significantly higher at 1, 3, and 5 weeks after iOVD in the iOVD group, but there were no significant differences at 1 day, or 7 or 9 weeks. There were no significant differences in the average firing frequency during the experimental period. Conclusions: The present study findings suggest that TMJ mechanoreceptors in adult rats may ultimately adapt to iOVD. (Angle Orthod. 2011;81:453-459.)

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“…Sensory neurons that supply the TMJ are classified as either mechanoreceptive or nociceptive neurons. It has been shown that the response properties of TMJ‐mechanoreceptive neurons change after feeding with a liquid diet . The nociceptive system provides warning signals to identify internal and external noxious stimuli and is a basic physiological defense mechanism.…”

Section: Introductionmentioning

confidence: 99%

Effects of a liquid diet on the response properties of temporomandibular joint nociceptive neurons in the trigeminal subnucleus caudalis of growing rats

Hiranuma

Kokai

Fujita

et al. 2013

Orthod Craniofacial Res

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Effects of a Liquid Diet on Temporomandibular Joint Mechano-receptors

Cited by 13 publications

References 26 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

Functional adaptability of temporomandibular joint mechanoreceptors after an increase in the occlusal vertical dimension in rats

Effects of a liquid diet on the response properties of temporomandibular joint nociceptive neurons in the trigeminal subnucleus caudalis of growing rats

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