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Chapter 3 Myology 肌学,Section 1 General description,泰山医学院人体解剖学教研室 赵振美,Composition Muscle belly肌腹 Tendon肌腱 aponeurosis 腱膜,Classification Long muscle 长肌 Short muscle 短肌 Flat muscle扁肌 Orbicular muscle 轮匝肌,Morphology and composition of skeletal muscles,Origin, insertion and action of skeletal muscles, Supplementary structures of muscles Fascia 筋膜 Superficial fascia Deep fascia,Synovial bursa 滑膜囊,Tendinous sheath 腱鞘 Fibrous layer Synovial layer:,Section 2 Muscles of head,Facial muscles 面肌,Epicranius 颅顶肌 (occipitofrontalis) 枕额肌 Frontal belly 额腹 Occipital belly 枕腹 Galea aponeurotica 帽状腱膜,Orbicularis oculi 眼轮匝肌 Buccinator 颊肌 Orbicularis oris 口轮匝肌,Masticatory muscles,Masseter 咬肌 Origininferior border and medial surface of zygomatic arch Insertionlateral surface of ramus of mandible and angle of mandible Actionelevates mandible Temporalis 颞肌 Origintemporal fossa Insertioncoronoid process of mandible Actionelevates and retracts mandible,Medial pterygoid 翼内肌 Lateral pterygoid 翼外肌,咀嚼肌,咀嚼肌,Section 3 Muscles of neck,Superficial group Platysma 颈阔肌,Sternocleidomastoid 胸锁乳突肌,Suprahyoid muscles Digastric 二腹肌 Stylohyoid 茎突舌骨肌 Mylohyoid 下颌舌骨肌 Geniohyoid 颏舌骨肌 Elevate (raise) hyoid bone and depress mandible., Infrahyoid muscles Sternohyoid 胸骨舌骨肌 Omohyoid 肩胛舌骨肌 Sternothyroid 胸骨甲状肌 Thyrohyoid 甲状舌骨肌 Depress hyoid or larynx after elevation, Deep cervical muscles,Lateral Scalenus anterior 前斜角肌 Scalenus medius 中斜角肌 Scalenus posterior 后斜角肌 Scalene fissure 斜角肌间隙 Action : Medial longus capitis 头长肌 longus colli 颈长肌 Flex the head, bends the neck forward,Section 4 Muscles of trunk,Muscles of back Trapezius 斜方肌 Latissimus dorsi 背阔肌 Erector spinae 竖脊肌,Trapezius 斜方肌,Origin: superior nuchal line, external occipital protuberance, ligamentum nuchae and spinous processes of seventh cervical and all thoracic vertebrae Insertion: lateral third of clavicle, acromion, and spine of scapulary Action: upper fibers elevate scapula, lower fibers depress scapula; if scapula is fixed, one side acting along, draws head toward the same side, and turn face to opposite side; both sides together, draw head directly backward,Latissimus dorsi背阔肌,Origin: spinous processes of lower six thoracic and all lumbar vertebrae, median sacral crest, and posterior part of iliac crest. Insertion: crest of lesser tubercle of humerus. Action: trunk fixed, extends, adducts and medially rotates arm ; arm fixed, elevates trunk.,Erector spinae,Position: fills the vertebral groove on each side of the spine Action: extends vertebral column (draw head backward),Muscles of thorax,) Thoracico-upper-limb muscles胸上肢肌 ) Thoracicointrinsic muscles胸固有肌,Pectoralis major 胸大肌,Origin: medial half of clavicle, sternum,1st-6th costal cartilages. Insertion: crest of greater tubercle of humerus. Action: flexes, adducts and rotates arm medially; arm fixed, elevates trunk; elevates ribs 1-6, aiding in forced inspiration.,Pectoralis minor 胸小肌,Serratus anterior 前锯肌,) Thoracicointrinsic muscles,Intercostales externi 肋间外肌 Intercostales interni 肋间内肌 Intercostales intimi 肋间最内肌, Diaphragm 膈,Shape and position: a peripheral muscular part and a central tendon,Openings in the diaphragm Aortic hiatus主动脉裂孔lies anterior to the body of the 12th thoracic vertebra between the crura. It transmits the aorta, thoracic duct Esophageal hiatus 食管裂孔for esophagus and vagus nerves at level of T10. Vena cava foramen 腔静脉孔for inferior vena cava, through central tendon at T8 level,Action, Muscles of abdomen,Anterolateral group Obliquus externus abdominis腹外斜肌 Inguinal ligament 腹股沟韧带 Superficial inguinal ring 腹股沟管浅环,Obliquus internus abdominis 腹内斜肌,Inguinal falx 腹股沟镰: Cremaster 提睾肌:,Transversus abdominis 腹横肌,Rectus abdominis 腹直肌,Intersections 腱划,Sheath of rectus abdominis腹直肌鞘,Linea alba 白线,2. Posterior group,Quadratus lumborum 腰方肌,Inguinal canal 腹股沟管,Position: Two open
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