Research is reviewed on the effects of chewing gum on stress, alertness and cognition (including findings from cognitive neuroscience). There is some evidence that chewing gum reduces chronic stress, while effects on acute stress have been less clear in an experimental context. A robust effect of gum chewing on subjective alertness has been observed. However, findings on chewing gum and cogniti...

Surface Electromyography (sEMG) has been widely used for studying human mastication, due to its ability to non-invasively monitor the activity of muscle groups associated with chewing (Boyar & Kilcast, 1986; Brown, 1994). It is regarded as the “gold standard” for objective measurement of simple parameters relating to chewing behaviour, such as chew rate and strength. Attempts have been made to ...

Maximum biting force and chewing performance were measured in adult subjects before and after four-weeks training by newly devised "Chewing Ability Enhancing Substances (CAES)". The CAES is made of glucomannan. The number of chewing strokes and chewing time until the last swallowing action are much larger when chewing CAES than those of other usual eating materials. By four weeks training using...

Masticatory efficiency in individuals with extensive tooth loss has been widely discussed. However, little is known about jaw movement smoothness during chewing and the effect of differences in food bolus location on movement smoothness and masticatory efficiency. The aim of this study was to determine whether experimental differences in food bolus location (anterior versus posterior) had an ef...

BACKGROUND The deleterious effects of chewing betel quid (BQ) with or without tobacco on periodontal health are poorly addressed. The aim of this study was to investigate the severity and extent of periodontal disease among individuals chewing BQ with and without tobacco. METHODS One hundred twenty individuals (70 BQ chewers: 35 with tobacco and 35 without tobacco) and 50 control individuals ...

Neck function in rhythmic jaw activities. Birgitta Häggman Henrikson 2004. Department of Odontology, Clinical Oral Physiology, Umeå University, and Centre for Musculoskeletal Research, Gävle University, Sweden. Previous studies in animals and humans show anatomic and physiological connections between the trigeminal and the cervical regions. This investigation tested the hypothesis of a function...

AIMS OF THE STUDY (1) To assess psychological khat dependence and (2) to assess the validity and reliability of the Severity Dependence Scale (Gossop et al., 1995) amended for khat use (SDS-khat), in a sample of UK-resident male adult Yemeni khat chewers. MATERIALS AND METHODS A cross-sectional study using a face to face structured interview schedule was conducted amongst purposively sampled ...

This study aims to quantitatively clarify the physiological features in rhythmically coordinated jaw and neck muscle EMG activities while chewing gum using EMG-EMG transfer function and EMG-EMG coherence function analyses in 20 healthy subjects. The chewing side masseter muscle EMG signal was used as the reference signal, while the other jaw (non-chewing side masseter muscle, bilateral anterior...

In the attempt to lower the sugar consumption in population is to exchange the number of sugar sweeteners which manufacture produced for used in foods, drinks and candy with non-sugar sweetener as xylitol. Xylitol is effective as noncariogenic substitutes for use in place of glucose. Objectives: A clinical trial was carried out to investigate the effect of sugar candy containing xylitol inhibit...