Periodontal Mechanoreceptors and Parotid Secretion in Animals and Man

Anderson, David J.; Hector, Mark

doi:10.1177/00220345870660022201

Cited by 63 publications

(47 citation statements)

References 9 publications

(13 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…a response to sensory information not from thermoreceptors. Mandibular movement or perioral mechanical stimulations are well known to produce salivary secretion (Matsuo & Kusano, 1984;Anderson & Hector, 1987), and vigorous jaw movement is observed during grooming. Furthermore, according to Matsuo & Yamamoto (1987), the corda tympani nerve increases its firing rate during grooming as well as when licking taste solutions.…”

Section: Discussionmentioning

confidence: 99%

Salivary secretion and grooming behaviour during heat exposure in freely moving rats.

Yanase

Kanosue

Yasuda

et al. 1991

The Journal of Physiology

View full text Add to dashboard Cite

SUMMARY1. At neutral (24°C) and at hot (40°C) ambient temperatures (TR) salivary secretion from the submandibular gland of freely moving rats was recorded, together with simultaneous observation of saliva-spreading behaviour (grooming).2. At a Ta of 24°C, basal salivary flow was less than 2 /tl/min. When rats were first placed in the experimental chamber, brief grooming bouts often occurred. Transient secretion at more than 10 ,l/min was associated with this grooming, and the rate of salivary flow was positively correlated with the duration of grooming activity.3. At a Ta of 40°C, grooming appeared frequently and salivary secretion at more than 20 u1/min continued even between grooming bouts. Threshold rectal temperatures (Tre) for thermally induced grooming (38-2 + 0-2°C) and for salivary secretion (38-2 + 01°C) were similar, and for eleven of sixteen rats the two thresholds coincided.4. At the threshold Tle both the rate of salivary secretion and the duration of grooming increased in a stepwise fashion. Above the threshold, there was no correlation between the duration of grooming and the rate of salivary flow.5. Thermally induced salivary secretion and grooming behaviour appear to be controlled by independent mechanisms.

show abstract

Section: Discussionmentioning

confidence: 99%

Salivary secretion and grooming behaviour during heat exposure in freely moving rats.

Yanase

Kanosue

Yasuda

et al. 1991

The Journal of Physiology

View full text Add to dashboard Cite

show abstract

“…During wakefulness, a higher rate of salivary flow occurs during chewing, biting, or talking than during rest (Anderson et al, 1996;Anderson and Hector, 1987;Hector and Linden, 1987;Jensen Kjeilen et al, 1987;Losso et al, 1997;Scott et al, 1998). During the day, salivary flow rate is also subject to circadian influences; it is higher in the afternoon than in the morning (Borgeat et al, 1984).…”

Section: Salivation and Sleepmentioning

confidence: 99%

Neurobiological Mechanisms Involved in Sleep Bruxism

Lavigne

Kato

Kolta

et al. 2003

Critical Reviews in Oral Biology & Medicine

441

290

View full text Add to dashboard Cite

Sleep bruxism (SB) is reported by 8% of the adult population and is mainly associated with rhythmic masticatory muscle activity (RMMA) characterized by repetitive jaw muscle contractions (3 bursts or more at a frequency of 1 Hz). The consequences of SB may include tooth destruction, jaw pain, headaches, or the limitation of mandibular movement, as well as tooth-grinding sounds that disrupt the sleep of bed partners. SB is probably an extreme manifestation of a masticatory muscle activity occurring during the sleep of most normal subjects, since RMMA is observed in 60% of normal sleepers in the absence of grinding sounds. The pathophysiology of SB is becoming clearer, and there is an abundance of evidence outlining the neurophysiology and neurochemistry of rhythmic jaw movements (RJM) in relation to chewing, swallowing, and breathing. The sleep literature provides much evidence describing the mechanisms involved in the reduction of muscle tone, from sleep onset to the atonia that characterizes rapid eye movement (REM) sleep. Several brainstem structures (e.g., reticular pontis oralis, pontis caudalis, parvocellularis) and neurochemicals (e.g., serotonin, dopamine, gamma aminobutyric acid [GABA], noradrenaline) are involved in both the genesis of RJM and the modulation of muscle tone during sleep. It remains unknown why a high percentage of normal subjects present RMMA during sleep and why this activity is three times more frequent and higher in amplitude in SB patients. It is also unclear why RMMA during sleep is characterized by co-activation of both jaw-opening and jawclosing muscles instead of the alternating jaw-opening and jaw-closing muscle activity pattern typical of chewing. The final section of this review proposes that RMMA during sleep has a role in lubricating the upper alimentary tract and increasing airway patency. The review concludes with an outline of questions for future research.

show abstract

“…We hypothesized (1) that individual variations in task performance would be reflected in individual variations in the mental (perceived) as well as the physiological (cortisol concentration, salivary flow rate, and masticatory muscle activity) stress levels, (2) that similar variations in the stress levels could be obtained on a group basis comparing aged and young subjects, and (3) that the physiological stress parameters (cortisol concentration, salivary flow rate, and masticatory muscle activity) would be mutually interrelated. Thus the aims of the present study were to assess and compare perceived stress, task difficulty, and performance with the physiological effects in terms of salivary cortisol, salivary flow rate, and masticatory muscle activity associated with the tasks on (1) an individual level and (2) on a group level comparing healthy, well-educated aged and young subjects and (3) to assess the relationship between the physiological effects of the tasks.…”

Section: Introductionmentioning

confidence: 99%

Salivary Cortisol Level, Salivary Flow Rate, and Masticatory Muscle Activity in Response to Acute Mental Stress: A Comparison between Aged and Young Women

Bakke

Tuxen²,

Thomsen³

et al. 2004

Gerontology

View full text Add to dashboard Cite

Background: Age-related effects on physiological stress reactions regarding changes in salivary cortisol concentration, saliva flow rate, and masticatory muscle activity, as well as the corresponding perceived mental stress and performance in response to acute stressors, have not yet been fully described. Objective: Thus, the aim of this study was to assess the age-related variations in these variables in response to minor acute and naturalistic stressors in terms of computer tasks. Methods: 13 aged (60–70 years old) and 13 young (20–30 years old) women with frequent practice and long experience with computer use were recruited by personal contact and flyers. The subjects were healthy and had full dental arches and no orofacial pain. The computer tasks were randomized and comprised a mentally demanding, modified Stroop colour-word test (CWT) and a less demanding reference test, both with a duration of 20 min and with equal physical demand. Visual analogue scales for global assessment of mental stress and perceived task difficulty and performance, measurements of saliva flow rate and cortisol concentration (unstimulated whole saliva), as well as surface electromyography of the temporalis and masseter muscles were used for assessment, and Spearman correlation analysis and Anova with repeated measures were used for statistical evaluation. Results: The perceived task-related stress and task difficulty were significantly higher and the personal satisfaction with the task performance significantly poorer in the aged women. The cortisol concentration, indicating the stress level, showed a small, but significant increase in response to the tasks. Also the saliva flow rate increased. This response was most pronounced in the aged and during the CWT. The average electromyogram varied significantly between age groups and tasks, with higher levels and shorter relative periods with gaps in the aged women and in the CWT. In addition, the peak activity of the jaw elevator muscles at mouse clicking was significantly elevated as a form of co-activation or attention-related activity. Conclusions: The study showed marked differences in the response to mental demands in aged as compared with young women. The mental stress, reflected by increases of salivary cortisol concentration, saliva flow rate, visual analogue scale ratings, and activity level of the jaw elevator muscles, was more pronounced in the aged women in response to the computer tasks.

show abstract

Periodontal Mechanoreceptors and Parotid Secretion in Animals and Man

Cited by 63 publications

References 9 publications

Salivary secretion and grooming behaviour during heat exposure in freely moving rats.

Salivary secretion and grooming behaviour during heat exposure in freely moving rats.

Neurobiological Mechanisms Involved in Sleep Bruxism

Salivary Cortisol Level, Salivary Flow Rate, and Masticatory Muscle Activity in Response to Acute Mental Stress: A Comparison between Aged and Young Women

Contact Info

Product

Resources

About