Term
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Definition
Origin: Zygomatic arch and Maxilla
Insertion: Angle and ramus of mandible
Action: Close jaw and elevates mandible |
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Term
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Definition
Origin: Temporal fossa
Insertion: Coronoid process of mandible
Action: Close jaw, retracts mandible |
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Term
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Definition
Origin: Fascia of chest (over pectoral and deltoids).
Insertion: Lower margin of mandible, skin, and muscle at corner of mouth.
Action: Depresses mandible, pulls lower lip back and down. |
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Term
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Definition
Origin: Lower margin of mandible (anterior belly( and mastoid process (posterior belly).
Insertion: connective tissue loop to hyoid bone.
Action: Acting in concert, elevate hyoid bone, open mouth and depress mandible. |
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Term
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Definition
Origin:Clavicle, sternum, cartilage of ribs 1-6. Aponeurosis of external oblique muscle.
Insertion: Fibers converge to insert by short tendon into the inter tubercular sulcus of humerus.
Action: Prime arm flexor adducts, medially roates arm. Arm fixed pulls chest upward (inspiration). |
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Term
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Definition
Origin: Lateral aspect of ribs 1-8
Insertion: Vertebral border of anterior surface of scapula.
Action: Moves scapula forward toward chest wall. Rotates scapula causing inferior angle to move laterally and upward, abduction and raising of arm. |
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Term
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Definition
Origin: Lateral 1/3 of clavicle; acromion and spine of scapula.
Insertion: Deltoid tuberosity of humerus
Action: Prime mover of arm abduction and raising of arm. Can aid in flexion and extension and rotation of humerus. |
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Term
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Definition
Origin: Anterior surfance of ribs 3-5 near their costal cartilages.
Insertion: coracoid process of scapula.
Action: With ribs fixed, draws scapula forward and inferior; with scapula fixed draws rib cage superior. |
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Term
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Definition
Origin: Inferior border of rib
Insertion: Superior border of rib below.
Action: Pulls ribs toward one another to elevate rib cage. Aids in inspiration. |
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Term
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Definition
Origin: Superior border of rib below
Insertion Inferior border of rib above
Action: Draws ribs together to depress rib cage; aids in forced expiration; antagonistic to external intercoastals. |
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Term
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Definition
Origin:Pubic crest and symphysis
Insertion: Xiphoid process and costal cartilages of ribs 5-7
Action: Flexes rotates vertebral column. Increases abdominal pressure, fixes and depresses ribs. Stabilizes pelvis during walking. |
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Term
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Definition
Origin: Anterior sufance of last 8 ribs.
Insertion: Linea alba, pubic crest and tubercles and iliac crest.
Action: Aids in muscles of back in trunk rotation and lateral flexion use in oblique curls. Also jobs of the rectus abdominis.
Action: |
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Term
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Definition
Origin: Lumbar fascia, iliaic crest and the inguinal ligament.
Insertion: linia alba, pubic crest, cartilages of last 3 ribs.
Action: As for external obliques: Aids in muscles of back in trunk rotation and lateral flexion use in oblique curls. Also jobs of the rectus abdominis. |
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Term
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Definition
Origin: Inguinal ligament, iliac crest, cartilages of last 5-6 ribs, lumbar fasica.
Insertion: Linea alba and public crest
Action: Compresses abdominal contents. |
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Term
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Definition
Origin: Pccipital bone, ligamentum nuchaw, spines of C7 and all thoraic vertebrae.
Insertion: Acromion and spinous process of scapula, lateral third of clavicle.
Action: Extends head, raises rotates and retracts scapula and stabilizes it, superior fibers elevate scapula, inferior fibers depresses. |
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Term
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Definition
Origin: Infraspinous fossa of scapula.
Insertion: Greater tubercle of humerus
Action: lateral rotation of humerus, helps hold head of humerus in glenoid cavity, stabilizes shoulder. |
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Term
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Definition
Origin: :ateral margin of scapula
Insertion: Greater tubercle of humerus
Action: lateral rotation of humerus, helps hold head of humerus in glenoid cavity, stabilizes shoulder. |
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Term
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Definition
Origin: Posterior surface at inferior angle of scapula.
Insertion: Intertubercular sulcus of humerus.
Action: Extends, medially rotates, and adducts humerus, synergist of latissimus dorsi. |
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Term
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Definition
Origin: Supraspinous fossa of scapula
Insertion: Greater tubercle of humerus
Action: Assists abduction of humerus, stabilizes shoulder joint. |
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Term
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Definition
Origin: Transverse processes of C1-C4
Insertion: Medial border of scpula superior to spine.
Action: Elevates and adducts scapular, fixed scapula, flexes neck to the same side. |
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Term
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Definition
Origin: Spinous processes of C7, T1-T5.
Insertion: Medial border of scapula
Action: Pulls scapula medially stabilizes scapular, rotates glenoid cavity downward. |
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