In view of the consistency of this pattern, I have reconstructed the masseter as arising from the lower wall of the cheek beneath the temporal opening.
Consequently, the masseter was able to extend from an anterodorsal origin to a posterior and ventral insertion.
The reconstruction of the progressively widening masseter as it traveled to the mandible follows from the progressively widening depression on the internal wall of the cheek against which the muscle must have been appressed.
The lateral division consisted of temporal and masseter masses.
The masseter inserted lateral to it, over the peak of the coronoid process, and overlapping onto the dorsalmost portions of its external face, as Watson has illustrated (Plate I, middle fig.
The nature of these insertions suggests that the muscle was already divided into two parts, an outer masseter and an inner temporalis.
This ridge presumably marks the upper limits of the origin of the masseter from the squamosal.
Watson's reconstruction shows both the temporal and masseter muscles as being limited anteroposteriorly to an extent only slightly greater than the anteroposterior diameter of the temporal opening.
The masseter probably arose from the quadratojugal, the jugal, and ventral parts of the squamosal, although scars on the quadratojugal and jugal are lacking.
The masseter inserted on the external surface of the coronoid process, within two shallow concavities separated by an oblique ridge.
But in Captorhinus the masseter arose from the lower part of the cheek close to the outer surface of the coronoid process.
Finally there is evidence for an adductor between the temporal and masseter masses.
The development of the masseter extending posteroventrally from an anterior origin presumably paralleled the reduction of the anterior pterygoids.
There was thus no wound of the mucous membrane of the mouth, the masseter and pterygoid muscles were not completely divided, and the facial artery was intact.
The parotid gland and masseter muscle being dissected off the jaw, it was divided by cutting-pliers immediately behind the wisdom-tooth, after being notched with a saw.
The facial artery V, which springs from the external carotid, D, may be compressed against the horizontal ramus of the lower jaw-bone at the anterior border of the masseter muscle.
Masseter muscle, crossed by the parotid duct, and some fibres of platysma.
The skull of a toy-terrier has much restricted areas of insertion for the temporal muscles; has weak zygomatic arches; and has extremely small attachments for the masseter muscles.
Each gland is surrounded by a capsule, to which are partly attached the fibres of the masseter muscle, which violently compresses it and drives the poison, just as the piston of a syringe would do, into the canaliculi or groove of the fang.
The lower jaw is large, especially the region of the angle, which is expanded and flattened, giving great surface for the attachment of the masseter muscle.
When the symptoms became more serious and masseter spasm developed, a question of tetanus arose.
The condition somewhat suggests that of acute meningitis or tetanus, and especially suggests tetanus because it is often associated with masseter contracture (hysterical trismus).
He was found next morning on his back, with a fixed and haggard look, crimson face, masseter and phalangeal spasm at times.
The form of the osseous parts which give it origin is, besides, in relation with these differences, and explains the peculiar characters which the masseter presents.
With regard to the malar bone, it is most important to notice the part which it takes in the formation of the zygomatic arch, and that its inferior border contributes to form the crest to which is attached the masseter muscle.
For those who have studied the masseter of man, it is not difficult to recognise that of quadrupeds.
Masticatory Muscles The muscles of this group which specially interest us are the masseter and the temporal.
Oppenheim has seen facial and masseter spasm checked by the extraction of a carious tooth, and in another case by an operation on the ear.
There was synchronous spasm in the masseter muscles, resulting in elevation of the inferior maxilla.
In the ancestral lineage, the ridge is distinct but relatively low; the masseteric fossa is shallow and is a poorly developed area for attachment of the superficial masseter muscle.
The masseteric fossa receives the insertion of the rostral or superficial division of the masseter muscle.
These two divisions of the masseter muscle have a longer pull (forward) in the dolichocephalic skull than in a non-dolichocephalic skull.
The elaboration of the crest and fossa evidently is associated with an increase in size of the superficial masseter muscle, which enlarges and provides increased power for the propalinal type of mastication.
The superficial (or rostral) masseter muscle, originates on the side of the rostrum and inserts in the masseteric fossa and on the masseteric ridge.
Fractures of the angle and through the ramus are less common, and are not attended with deformity, as the fragments are retained in position by the masseter and internal pterygoid muscles.
It is sometimes bilateral, the bone giving way at the canine fossa on one side and just in front of the masseter on the other; or both fractures may be at the canine fossæ.
The opening of the sinus is most commonly situated at the under margin of the mandible a little in front of the masseter muscle.
The facial portion of the gland lies on the surface of the masseter muscle, and the parotid duct (Stenson's duct) emerges from its anterior border.
When only one side is broken, the smaller fragment is usually displaced outwards and forwards by the masseter and temporal muscles, so that it overlaps the larger fragment.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "masseter" in a variety of sentences. We hope that you will now be able to make sentences using this word.
