詳細検索結果
以下の条件での結果を表示する:
全文: "Medial pterygoid muscle"
125件中 1-20の結果を表示しています
  • Osamu Tsuji
    Okajimas Folia Anatomica Japonica
    1969年 46 巻 1 号 21-40
    発行日: 1969年
    公開日: 2012/09/24
    ジャーナル フリー
  • KEISUKE KIMURA
    Okajimas Folia Anatomica Japonica
    1982年 59 巻 1 号 25-43
    発行日: 1982年
    公開日: 2012/09/24
    ジャーナル フリー
    The origin, course and ramifications, from the origin to the mandibular foramen, of the inferior alveolar artery of the rabbit were studied by the acryl plastic injection method. In particular, the relations between the posterior deep temporal and the inferior alveolar arteries in their origin were clarified. The inferior alveolar artery was found to arise from the maxillary artery via a common trunk with the posterior deep temporal artery at the posterior end of the origin of the medial pterygoid muscle, although the posterior deep temporal appeared as a branch of the inferior alveolar. This common trunk ran laterally, and gave rise to the medial and lateral pterygoid branches as well as small twigs to the otic ganglion and the tympanic bulla. It thus reached the meeting area between the inferior margin of the lateral pterygoid muscle and the posterior margin of the medial pterygoid muscle, where it divided into the inferior alveolar artery anteroinferiorly and the posterior deep temporal artery superiorly. The inferior alveolar artery gave off the lingual branch, the temporal branch and the anterior marginal branch, and sometimes the deep layer branch, between the pars orbitalis ventralis of the temporal muscle and the deep layer of the medial pterygoid muscle.
  • Fernanda Trautmann, Paula de Moura, Tito L. Fernandes, Rogério O. Gondak, Julio C. de M. Castilho, Edmundo Medici Filho
    Journal of Oral Science
    2010年 52 巻 3 号 485-489
    発行日: 2010年
    公開日: 2010/09/24
    ジャーナル フリー
    In this report, we present a case of myositis ossificans traumatica (MOT) of the medial pterygoid muscle that had developed after mandibular block anesthesia administered for endodontic treatment of the lower right second molar, demonstrating typical features of this condition. MOT should be considered as a differential diagnosis when there is severe limitation of jaw opening and an associated trauma. Panoramic radiographs and axial and coronal computed tomography (CT) scans can effectively delineate the calcified mass. Other imaging studies that may be helpful include magnetic resonance imaging (MRI), bone scans, and ultrasound. As shown in our case, calcified masses were found in the right mandibular angle, which severely limited jaw opening. Some earlier reported cases of MOT were treated by extraoral surgical approaches with complete removal of the evolving muscle. The aim of this case report is to present only the diagnostic imaging aspects of myositis ossificans traumatica. (J Oral Sci 52, 485-489, 2010)
  • Koh NAKAJIMA, Grant TOWNSEND
    Okajimas Folia Anatomica Japonica
    2009年 86 巻 1 号 7-16
    発行日: 2009年
    公開日: 2009/08/05
    ジャーナル フリー
    The masticatory muscles are usually classified into four groups: masseter, temporalis, lateral pterygoid and medial pterygoid. The communicating muscle bundle between the temporalis and masseter called the zygomaticomandibular muscle exists. The laminations within these muscles are commonly separated by aponeuroses. Nerves control the action of muscles, so improved understanding about innervation patterns in the masticatory muscles is important in the consideration of muscle function. In this study, we focus on the relationships between the nerves supply and the lamination of masticatory muscles in Phascolarctos cinereus (Koala).
    The masseter muscle consists of superficial and deep muscle layers. The superficial muscle layer of the masseter muscle is divided into rostro-lateral and caudo-internal nerve layers. The deep muscle layer of the masseter muscle is divided into rostral, rostro-lateral, medial and caudo-internal nerve layers. The nerves that innervate the zygomaticomandibular muscle are distributed to the lateral area of the coronoid process. The temporalis muscle was divided into internal layer of the coronoid process, a lateral layer of the coronoid process and a posterior layer by the nerve distribution pattern. The medial pterygoid muscle divided into rostro-internal, medial and caudo-lateral nerve layers.
  • SHIGERU KATSURA, HIROSHI ISHIZUKA, HAYASHI MATSUMOTO, YOSHIKO NAKAE
    ACTA HISTOCHEMICA ET CYTOCHEMICA
    1982年 15 巻 5 号 701-709
    発行日: 1982年
    公開日: 2009/10/28
    ジャーナル フリー
    The cellular differentiation and histogenesis of the histochemical architecture of the medial pterygoid muscle of rats were studied by histochemical staining for SDH. From day 18 of gestation to day 18 after birth, the development of two kinds of muscle fibers could be distinguished: fibers with fine formazan crystals diffusely distributed in the sarcoplasm (SS) and fibers with large formazan particles diffusely distributed in the sarcoplasm (SL). After day 18 some muscle fibers showed marked progress of cellular differentiation and became similar to adult muscle fiber types. After day 23 most muscle fibers could be classified into three types; Type A, Type B, and Type C according to Stein and Padykula (47). Until day 2 after birth, regions with high and low percentage distribution of SL fibers (Psl) were distinguishable. By day 3 after birth the organization of the primordial muscle structure observed in cross section had become similar to that of adult muscle and significant differences of Psl values were found in different regions in cross sections. Thereafter the Psl values of each muscle region increased, especially from day 6 to 18. On day 23 after birth the distribution patterns of percentage of Type B plus Type C fibers (Pbc) and the percentage of Type C fibers (Pc) in cross sections became similar to that in young adult muscle. Moreover, the range of Psl, Pbc and Pc values of primary fasciculi in each region showed significant changes during postnatal development.
  • 太田 千佳子, 四井 資隆, 川本 達雄
    歯科医学
    2006年 69 巻 1 号 47-
    発行日: 2006/03/25
    公開日: 2017/05/22
    ジャーナル フリー
  • Iwao SATO, Kazuyuki SHIMADA, Gen MURAKAMI, Narumi SAGARA, Tooru SATO
    Okajimas Folia Anatomica Japonica
    1994年 70 巻 6 号 273-284
    発行日: 1994/03/22
    公開日: 2012/09/24
    ジャーナル フリー
    We analyzed the masticatory Muscles (masseter, temporal, medial pterygoid and lateral pterygoid muscles) of Bovidae and Cervidae (Artiodactyla) for the histochemical characteristics of their fiber types. Analysis of muscle fiber types in the present study was based on the staining reaction for SDH, Sudan black B, α-GPDH, and myosin-A TPase after alkaline preincubations. Histochemical properties were found to contribute to masticatory function, including a slow-twitch fatigue resistant activity derived from the high percentage of red fibers, in spite of the differences in the distributions of fiber types in three portions (superficial, medial and profound portions) of each masticatory muscle.
    These results indicate a correlation between the histochemical profiles of individual masticatory muscles in these species and their functions during jaw movements. Histochemical profiles of fiber types in masticatory
  • Kentaro Jidoi, Takashi Nara, Yukio Dodo
    Anthropological Science
    2000年 108 巻 4 号 345-370
    発行日: 2000年
    公開日: 2008/02/26
    ジャーナル フリー
    Bony bridging of the mylohyoid groove of the mandible (mylohyoid bridging) is one of the minor cranial variants and its frequencies in human groups have been used for population studies. Its value as a genetic marker, however, has not yet been established. Formalin-fixed human lower jaws of 16 individuals and human mandibles of 2, 158 individuals were morphologically and statistically examined. The findings indicate that the two basic types of mylohyoid bridging, lingular type and bridge type, can be treated as one and the same trait. Bilaterality in the expression and the occurrence independent of age and sex are consistent with the assumption that genetic background is relevant to its formation. Moreover, relationships of human groups based on the frequency of mylohyoid bridging are compatible with those based on dental morphology and human genetic analysis. Although the mylohyoid bridging occurs with high frequency in Neanderthals, it can also be observed in European Upper Palaeolithic humans with distinctly higher frequency than in subsequent populations. This finding appears to be important in arguments regarding the population history in Europe, if genetic background is relevant to the expression of mylohyoid bridging as assumed from the present study.
  • TAKAO TOKIOKA, YOSHIKUNI OHTA, HIDEKI INAZUKA, HARUKI MIYAKE
    Okajimas Folia Anatomica Japonica
    1982年 58 巻 4-6 号 1135-1147
    発行日: 1982年
    公開日: 2012/09/24
    ジャーナル フリー
    The medial and lateral pterygoid muscles of the rabbit were investigated in detail by dissection. The medial pterygoid muscle could be separated into superficial, intermediate and deep portions; and the first into two layers, and the last into anterior and posterior parts, the latter consisting of three layers. These portions arose from the inferior border of the pyramidal process of the palatine bone and the pterygoid fossa, and were inserted on the crista pterygoidea, the pterygoid tuberosity and the angular process on the medial surface of the mandible. The lateral pterygoid muscle consisted of upper and lower heads, with the maxillary artery located between them. The latter was formed of three layers. Both heads arose from the lateral surface of the greater wing of the sphenoid bone, the lateral surface and the inferolateral end of the lateral plate of the pterygoid process, the lateral surface of the perpendicular plate of the palatine bone and the pterygoid fossa, and were inserted on the medial surface of the mandibular cervix.
  • Koh NAKAJIMA, Grant TOWNSEND, Soichiro TOMO, Yosinobu IDE, Kazuhiko OKA, Eizo WAKATSUKI
    Okajimas Folia Anatomica Japonica
    2000年 76 巻 6 号 303-310
    発行日: 2000/03/21
    公開日: 2012/09/24
    ジャーナル フリー
    An analysis of the laminations of the masseteric, zygomaticomandibular and temporalis muscles of the Red Kangaroo (Macropus Rufus) and all of the masticatory muscles of the Eastern Gray Kangaroo (Macropus Giganteus)was carried out based on their innervation. The masseteric muscle was divided into superficial and deep layers; the superficial layer was further subdivided into three laminae from the rostro-lateral portion to caudo-internal portion. The deep layer was divided into lateral, caudo-internal and rostro-internal laminae. The zygomaticomandibular muscle which was located between the masseteric and temporal muscles was divided into lateral, internal and rostral laminae, on the basis of its innervation. The lateral and internal laminae were innervated by the nerve which arises between the masseteric nerve and the posterior deep temporal nerve. A small rostral portion of the muscle was innervated by masseteric nerves, which passed through the internal lamina of the deep layer of the masseteric muscle. The temporalis muscle was innervated by an anterior deep temporal nerve and posterior deep temporal nerve. Only the most rostrointernal lamina of the temporalis muscle was innervated by the anterior deep temporal nerve. The anterior deep temporal nerve and lateral pterygoid nerve had a common trunk. We believe that the rostro-internal lamina was closely related to the lateral pterygoid muscle. The lateral pterygoid muscle displayed one lamina, whereas the medial pterygoid muscle was divided into internal and lateral laminae. The lateral lamina was further divided into rostro-internal and caudo-lateral laminae.
  • Yoshiaki Shimoo, Masahito Yamamoto, Masashi Suzuki, Masato Yamauchi, Akihiro Kaketa, Masaaki Kasahara, Masamitsu Serikawa, Kei Kitamura, Satoru Matsunaga, Shinichi Abe
    The Bulletin of Tokyo Dental College
    2017年 58 巻 2 号 95-101
    発行日: 2017年
    公開日: 2017/07/19
    ジャーナル フリー

    Although the risk of injuring the lingual nerve in the mandibular molar area during dental treatment is high, it can be repaired by nerve grafting. However, from the perspective of clinical dentistry, the pathway and histomorphometric characteristics of this nerve remain to be documented in detail. The purpose of the present study was to morphologically elucidate the pathway of the lingual nerve to clarify its significance in a clinical setting. A histomorphometric analysis was also performed in consideration of nerve grafting. The vertical distance between the occlusal plane and the superior margin of the lingual nerve showed a gradual decrease from the premolar toward the distal molar area. This suggests that the risk of injuring the lingual nerve increases gradually toward the distal area. The average total fascicular area of the lingual nerve was 1.90 mm2, which was larger than that of the sural nerve. It is the first-choice donor nerve for grafting. Therefore, even though the total fascicular area of the donor nerve is a little smaller than that of the recipient nerve, nerve grafting should be successful.

  • FUMIHIKO SUWA, SAISUKE TOMINAGA, HIDEO KUMAGAI
    Okajimas Folia Anatomica Japonica
    1978年 55 巻 5 号 255-263
    発行日: 1978/12/20
    公開日: 2012/09/24
    ジャーナル フリー
    The origin and ramification of the posterior deep temporal artery of the dog have been studied by means of the acryl plastic injection method. The artery arose distal to the origin of the inferior alveolar in more than half of all the examples observed, but in common or in contact with the inferior alveolar in others.
    All the branches of the artery were mentioned; the lingual, the temporomandibular joint, the anterior, the lateral pterygoid muscular branches and the masseteric artery. Then the artery terminated into the superior, the superoposterior and the posterior branches.
  • SHIGERU KATSURA, HIROSHI ISHIZUKA, HAYASHI MATSUMOTO
    ACTA HISTOCHEMICA ET CYTOCHEMICA
    1984年 17 巻 1 号 59-68
    発行日: 1984年
    公開日: 2009/10/28
    ジャーナル フリー
    The histochemical organization observed in cross sections of rat lateral pterygoid muscle was investigated by staining for succinic dehydrogenase. Most primary fasciculi were composed of three muscle fiber types: Type A (white), Type B (intermediate) and Type C (red) according to the classification of Ogata (34) and Stein and Padykula (41). We found two distinct regions, one region with high average percentage distributions of number of Type B plus Type C fibers (Pbc) and type C fibers (Pc) values and the other region with low Pbc and Pc values in cross sections and significant differences in these values in different portions (origin, belly and insertion). Moreover, marked differences were found in the percentage distribution of Pbc and Pc in different primary fasciculi in each region of the lateral pterygoid muscle. In old rats the three types of muscle fibers were easier to distinguish and differences in the average Pbc and Pc values in different regions of the muscle were greater. Moreover, primary fasciculi with high Pbc and Pc values, or those with low Pbc and Pc values were more numerous than in young adult rats.
  • MIGUEL C. MADEIRA, J. AMÉRICO DE OLIVEIRA
    Okajimas Folia Anatomica Japonica
    1979年 56 巻 1 号 35-44
    発行日: 1979年
    公開日: 2012/09/24
    ジャーナル フリー
    The description of the macroscopic structure of the masticatory muscles is based upon the dissection of 26 adult and juvenile tufted capuchin monkeys (Cebus apella) of both sexes.
    A detailed description of the temporal, masseter and medial and lateral pterygoid muscles on each side of the head is given. Not only the general shape, origin and insertion are described, but also the architectonic organization, i. e. the stratiform disposition of the muscle parts. Anatomical variations in each sex or age appear to be few and unimportant.
    Anatomical aspects are found to be essentially similar to those found in other primates including man; however some characteristic differences do exist and deserve special comment.
  • 糟谷 憲邦, 花田 誠, 清水 猛史
    耳鼻咽喉科臨床
    2009年 102 巻 7 号 571-576
    発行日: 2009年
    公開日: 2011/04/02
    ジャーナル 認証あり
    The patient was a 64-year-old man with an infra-auricular mass. Since the tumor was strongly adherent to the angle and the posterior aspect of the mandible, part of the medial pterygoid muscle, masseter muscle, and parotid gland, it was bluntly dissected and resected en bloc. The resected tumor was measured 65×50×13 mm, and weighed 31 g. The tumor was histopathologically diagnosed as an intramuscular lipoma, presumably arising from the sternocleidomastoid or masseter muscle.
    The reported recurrence rate of non-infiltrating lipoma is less than 5%, whereas that of infiltrating lipoma ranges from 3 to 62.5%. Since intramuscular lipoma is characterized by an infiltrating growth pattern, it cannot always be completely resected.
    To reduce its recurrence, it is necessary to perform a wide en-bloc resection of the adjacent normal muscle, while considering the degree of residual muscle dysfunction, including muscle weakness.
  • 岡部 良博, 榎澤 宗司, 藍 稔, 屋嘉 智彦, 佐藤 雅之, 西山 暁
    日本補綴歯科学会雑誌
    1996年 40 巻 5 号 933-939
    発行日: 1996/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    In order to conduct the EMG activity of the human medial pterygoid muscle, a bipolar needle electrode (Thumbtack type) was newly devised and an aid (Needle indicator) to insertion of the electrode into the muscle was made.
    Then the activity of the medial pterygoid muscle during clenching was recorded by using them and investigated.
    The results were as follows:
    1. The bipolar needle electrode formed as a thumbtack was easy to handle and to insert into the medial pterygoid muscle.
    2. The apparatus, which could indicate the orientation of the medial pterygoid muscle on the mandibular angle, was very useful when inserting the electrode into the muscle.
    3. The original waves of EMG during tasks were clear and did not hinder the quantification of EMG.
  • MOTOTSUNA IRIFUNE
    Okajimas Folia Anatomica Japonica
    1980年 57 巻 1 号 55-77
    発行日: 1980年
    公開日: 2012/09/24
    ジャーナル フリー
    The course, branching and distribution territories of the facial artery of the dog were studied by the acryl plastic injection method. In general, the facial artery was found to arise from the external carotid between the points of origin of the lingual and posterior auricular arteries. It ran anteriorly above the digastric muscle and gave rise to the styloglossal, the submandibular glandular and the pterygoid branches. The artery continued anterolaterally giving off the digastric, the inferior masseteric and the cutaneous branches. It came to the face after sending off the submental artery, which passed anteromedially, giving off the digastric and mylohyoid branches, on the medial surface of the mandible, and gave rise to the sublingual artery. The gingival, the genioglossal and sublingual plical branches arose from the vessel, while the submental artery gave off the geniohyoid branches. Posterior to the mandibular symphysis, various communications termed the sublingual arterial loop, were formed between the submental and the sublingual of both sides. They could be grouped into ten types. In the face, the facial artery gave rise to the mandibular marginal, the anterior masseteric, the inferior labial and the buccal branches, as well as the branch to the superior, and turned to the superior labial artery. As variations, the submental artery arose directly from the external carotid, and an accessory inferior alveolar artery arose from the facial in a few cases.
  • 桂 茂, 石塚 寛, 松本 林, 中江 良子
    歯科基礎医学会雑誌
    1981年 23 巻 4 号 685-690
    発行日: 1981/12/20
    公開日: 2010/10/28
    ジャーナル フリー
    ラットの内側翼突筋 (成熟雄個体) の細胞構築状態をSDH染色法によって検討した。内側翼突筋においてもSDHに強い活性を示す筋線維と淡染性のもの, 及びその中間のものの3種類の筋線維が識別できた。内側翼突筋の横断面上におけるoxidative index (OI) 及びS index (SI) の平均値はかなり著明な区域差を示した。これらの値の横断面上での分布パターンは筋の部位 (起始から停止部) によっては著差を示さなかった。しかしながら, その数値にはかなり著明な差異が見出された。又, さらに同一区域内に存在している1次筋束の間においても著明な差異が存在していた。老化個体では, 3種の筋線維の識別が容易になるとともに高いOIやSI値を有する1次筋束や, 低いOIやSI値を有する1次筋束が増数してきた。
  • Kai ITO, Hideki ENDO
    Journal of Veterinary Medical Science
    2019年 81 巻 3 号 389-396
    発行日: 2019年
    公開日: 2019/03/14
    [早期公開] 公開日: 2019/01/22
    ジャーナル フリー

    We compared the temporomandibular joint structure between species of the order Carnivora and investigated its variation among family lineages. We also investigated the effect of the masticatory muscle physiological cross-sectional area (PCSA) on temporomandibular joint structure. The masticatory muscle is composed of multiple muscles, which contract in different directions and exert pressure on the temporomandibular joint. We investigated the effect of the ratio of each muscle’s PCSA—an indicator of muscle force—and muscle size relative to body size on temporomandibular joint structure. The temporalis PCSA relative to body size showed the highest correlation with temporomandibular joint structure. When the temporalis PCSA is large relative to body size, the preglenoid projects caudally, the postglenoid projects rostrally and the pre-postglenoid angle interval is small, indicating that the condyle is locked in the fossa to reinforce the temporomandibular joint. Most Carnivora use blade-like carnassial teeth when slicing food. However, dislocation occurs when the carnassial teeth are used by the temporalis muscle. Our results suggest that the temporomandibular joint is reinforced to prevent dislocation caused by the temporalis muscle. In Mustelidae, the temporomandibular joint with a rostrally projecting postglenoid is suitable for carnassial biting using the temporalis muscle. In Felidae, the force of the masseter onto the carnassial teeth is diverted to the canine by tightening the temporomandibular joint. In Canidae, the masticatory muscle arrangement is well-balanced, enabling combined action. Hence, reinforcement of the temporomandibular joint by bone structure is unnecessary.

  • 荒垣 芳元
    歯科医学
    2006年 69 巻 1 号 47-48
    発行日: 2006/03/25
    公開日: 2017/05/22
    ジャーナル フリー
feedback
Top