Previous studies have shown that various stimuli applied in the orofacial region, evoke bilateral inhibitory responses in the jaw elevator muscles. The exteroceptive supression (ES) of the masseter muscle after electrical stimulation of the mental nerve, often appears as a double phase of inhibition interrupting the voluntary sustained contraction of the muscle. The aim of the present study was...

Paralytic lagophthalmos and smile dysfunction are serious complications of facial paralysis and various reconstructive procedures have been developed to treat them. Among these procedures, there is no doubt that dynamic procedures are more effective than static ones. The 1-stage simultaneous surgical treatment of these 2 dysfunctions with a dynamic procedure involving a single muscle would be i...

The purpose of this study was to investigate changes in the periodontal masseteric reflex (PMR) after experimentally induced occlusal hypofunction. Wistar rats were divided into control groups (CGs) and hypofunction groups (HGs). Rats in the HGs had their lower incisors cut down every other day for 6 weeks. Electrical stimulation was given to the periodontal ligaments of an upper incisor or the...

To examine the relationships between masticatory force, electromyogram (EMG) of masticatory muscles, and jaw movement pattern, we quantitatively evaluated the effects of changing hardness of a chewing substance on these three variables. Cortically induced rhythmic jaw movements of a crescent-shaped pattern were induced by electrical stimulation of the cerebral cortical masticatory area in the a...

to the left due to paresis of the left pterygoid muscle. The corneal refl ex was positive on both sides. All other neurological systems were regular. In particular, there were no sensory disturbances and no signs of polyneuropathy. Electromyography did not detect pathological spontaneous activity (most probably due to massive atrophy and chronicity of the process), but showed a single unit inte...

Background: Mandibular osteomyelitis is commonly associated with invasive surgery and sequestrectomy. Here, we report a unique case in which it was possible to choose minimally treatment during the exacerbation of at stage sequestrectomy owing use correct assessment ultrasonography (USG). This aimed present wide possibilities USG for accurate diagnosis management chronic osteomyelitis. Case Pre...

PURPOSE To examine gene expression profile changes in the mouse masseter muscle tissue after repetitive electrical stimulation by using a DNA microarray technique. METHODS Nine male ICR mice aged 10 weeks were used. Each anesthetized mouse was secured on a platform in a supine position and the masseter muscle tissues on both sides were exposed. Bipolar electrodes were set on the right massete...