PURPOSE We examined how chewing rate and the extent of reactive hyperemia affect the blood flow in denture-supporting mucosa during chewing. METHODS The left palatal mucosa was loaded under conditions of simulated chewing or simulated clenching for 30s, and the blood flow during loading was recorded. We compared the relative blood flow during loading under conditions that recreated different ...

BACKGROUND The goal of this prospective study was to estimate the absorbed (radiation) doses to salivary glands in radioiodine therapy of thyroid cancer under chewing-gum stimulation using (124)I positron emission tomography (PET)/computed tomography (CT) imaging. METHODS Duplex ultrasonography was conducted in three test persons for visual comparison of the glandular blood flow with three di...

In this study, we have explored the prospect of assessing and following level of total denture adaptation by use of EMG signals recorded during gum chewing. Total of 14 edentulous patients, 6 women and 8 men, with an average age of 63±9 years, were recruited. Separate EMG recordings were obtained from left and right temporalis and masseter muscles of the patients for a period of 10 seconds, whi...

In a study published previously in this journal (Wilkinson et al., 2002), the effect of chewing gum on cognitive functioning was examined. The results of this study indicated that chewing a piece of gum results in an improvement of working memory and of both immediate and delayed recall of words but not of attention. In the present study, memory and a variety of attentional functions of healthy...

Recent evidence suggests that voluntary rhythmic movements such as chewing may increase blood serotonin and subsequently brain serotonin, which in turn acts to alleviate premenstrual symptoms. In this observational cross-sectional study, we tested the hypothesis that hardness (difficulty of chewing) of the habitual diet (i.e. dietary hardness) is associated with decreased premenstrual symptoms....

Discharges of jaw muscle spindles were recorded during chewing carrot from mesencephalic trigeminal nucleus (Mes V) in the awake rabbit to evaluate contribution of the muscle spindles to the development of complete sequences of masticatory movements. The Mes V spindle units were divided into two types according to the maximum firing rates during mastication, with a dividing line at 200 Hz; high...

Issued 6 January 2006 ABSTRACT The antifungal activities of the ethanol and aqueous crude extracts of four Nigerian chewing sticks were investigated. Also a preliminary phytochemical analysis of the plants was done. The chewing sticks include Anogeissus schimperi, Distemonanthus benthmianus, Vernonia amagdalina and Xanthoxylum zanthoxyloides. All the plants tested, except Anogeissus Schimperi, ...

This study examined the effects of the textural properties and chemical components of foods on masseter activity patterns. Ten healthy young participants (seven men and three women) were asked to chew four gummy candies with different flavors while their masseter activities were recorded by a surface electromyogram. The masseter activity patterns during chewing were analyzed quantitatively usin...

A linkage-based chewing device is proposed to perform standardised chewing for use in food evaluation. The linkage for chewing is firstly specified in terms of the trajectory of the first molar and the chewing force, according to the in vivo measurements of the human chewing ranging from grinding (or lateral chewing) to crunching (or vertical chewing). A fourbar linkage is synthesized to achiev...