Intramuscular cavernous Haemangiomas represent less than 1% of all haemangiomas and consist of benign proliferations of blood vessels. Typical presentation is an enlarging painful soft-tissue mass without cutaneous changes. We diagnosed a series of 5 cases of cavernous haemangioma of the masseteric muscle presenting as an asymptomatic unilateral swelling. The rarity of a cavernous haemangioma i...

IMPORTANCE Reconstruction of the facial nerve after radical parotidectomy is commonly performed with cable grafting, which is associated with slow recovery of nerve function and synkinesis. OBJECTIVE To describe facial nerve reconstruction after radical parotidectomy using concurrent masseteric nerve transfer and cable grafting. DESIGN, SETTING, AND PARTICIPANTS This retrospective medical r...

BACKGROUND The masseteric nerve is a valuable donor nerve in the management of facial paralysis; however, its location is less familiar to surgeons because this motor nerve is not commonly exposed in other head and neck procedures. Current techniques for masseteric nerve identification rely on physical measurements from surface or bony landmarks that may be unpredictable across patient age, eth...

OBJECTIVE to investigate variations in the masseteric myotatic reflex (jaw-jerk) and the silent period from the 5th to the 9th decades of life. SUBJECTS AND METHODS electromyographic data were recorded from the masseter muscle of the preferred chewing side by surface electrodes, using a computerized recording and analysis system. Chin taps were applied with a neurologist's hammer during mandi...

The ultrasonographic images of 32 patients with inflammatory change in the masseteric region were investigated to clarify the characteristic findings and to evaluate the utility of ultrasonography. Inflamed masseter muscles frequently demonstrated reduction of echo intensity and complete or partial absence of hyperechoic bands. The mean thickness of the masseter muscle on the unaffected side wa...

Masseter hypertrophy is a benign condition with variable causative factors, such as bruxism, temporomandibular disorders, malocclusion and others, but has an unclear etiology in the majority of cases. Surgical masseteric resection was the conventional method of treatment for the asymmetric swellings over the ramus and angle of the mandible on one or both sides, in addition to the generally unsu...

Intramuscular hemangiomas are uncommon neoplasm's arising most frequently in the masseter and trapezius muscle. Due to it's location it is often mistaken for a parotid swelling and rarely is an accurate pre-operative diagnosis achieved clinically. The intra masseteric location also poses special problem in terms of proximity to the facial nerve and the post operative flattening following excisi...

The reflex response of the masseter muscle to the rapid unloading of a single maxillary incisor tooth was studied. Unloading of a static force of 2 N in the horizontal direction resulted in a short-latency excitation, inhibition, and long-latency excitation of masseter muscle activity occurring at latencies of approximately 13, 20, and 40 ms, respectively, with a corresponding change in bite fo...

INTRODUCTION Botulinum toxin injections are previously reported to be a noninvasive alternative method for treating masseteric hypertrophy. However, there is a debate on finding an ideal place for injection. The aim of this study is to document the anatomical landmarks for defining the motor nerve entry points (MNEPs) of the masseteric nerve in the masseter for effective botulinum toxin injecti...

Studies in the preceding paper demonstrated that the amplitude of the masseteric reflex in behaving cats is augmented by pharmacological manipulations that increase norepinephrine (NE) tone in the motor trigeminal nucleus (MoV) through exogenous means. The present studies examine whether such a relationship also exists under physiological conditions, i.e., whether physiological increases in NE ...