IndietroMuscle Identification, Actions, Origins, and Insertions
6:31
Termini in questo insieme (20)
Action: Elevates eyebrows, wrinkles forehead skin.
Origin: Galea aponeurotica.
Insertion: Subcutaneous tissue of eyebrows.
Action: Retracts scalp, fixes galea aponeurotica.
Origin: Superior nuchal line and temporal bone.
Insertion: Galea aponeurotica.
Action: Closes eyelids in blinking and squinting.
Origin: Lacrimal bone, frontal bone, maxilla, medial angle of eyelids.
Insertion: Upper and lower eyelids, skin around orbit margin.
Action: Closes and protrudes lips (kissing, speech).
Origin: Modiolus of mouth.
Insertion: Submucosa and dermis of lips.
Action: Compresses cheek, directs food between molars, expels air/liquid.
Origin: Alveolar processes of mandible and maxilla.
Insertion: Orbicularis oris, submucosa of cheek and lips.
Action: Draws lower lip and mouth angle downward, aids wide mouth opening.
Origin: Fascia of deltoid and pectoralis major.
Insertion: Mandible, skin and subcutaneous tissue of lower face.
Action: Elevates, retracts, and moves mandible laterally and medially.
Origin: Temporal lines and fossa of cranium.
Insertion: Coronoid process and anterior border of mandibular ramus.
Action: Elevates mandible; assists in protraction, retraction, lateral and medial excursion.
Origin: Zygomatic arch.
Insertion: Lateral surface of mandibular ramus and angle.
Action: Unilateral: tilts head upward and opposite side; Bilateral: draws head forward and down; aids deep breathing.
Origin: Manubrium of sternum, medial clavicle.
Insertion: Mastoid process, superior nuchal line.
Action: Prime mover of inspiration; compresses abdominal viscera; aids in sneezing, coughing, childbirth.
Origin: Xiphoid process, ribs 7-12, lumbar vertebrae.
Insertion: Central tendon of diaphragm.
Action: Elevate and protract ribs 2-12, expanding thoracic cavity during inspiration.
Origin: Inferior margins of ribs 1-11.
Insertion: Superior margin of next lower rib.
Action: Aid inspiration by elevating ribs; depress ribs during forceful expiration.
Origin: Superior margins and costal cartilages of ribs 2-12.
Insertion: Inferior margin of next higher rib.
Action: Supports abdominal viscera, stabilizes vertebral column, compresses abdominal organs, aids expiration and childbirth.
Origin: Ribs 5-12.
Insertion: Iliac crest, pubis.
Action: Same as external oblique but unilateral contraction causes ipsilateral waist rotation.
Origin: Inguinal ligament, iliac crest, thoracolumbar fascia.
Insertion: Ribs 10-12, costal cartilages 7-10, pubis.
Action: Flexes lumbar vertebral column, bending forward at waist.
Origin: Pubic symphysis and superior margin of pubis.
Insertion: Xiphoid process, costal cartilages 5-7.
Action: Extends and laterally flexes vertebral column; longissimus capitis rotates head ipsilaterally.
Origin: Nuchal ligament, ribs 3-12, thoracic and lumbar vertebrae, sacral crests, thoracolumbar fascia.
Insertion: Mastoid process, cervical and thoracic vertebrae, ribs.
Action: Fixes rib 12 aiding respiration; unilateral contraction flexes lumbar spine ipsilaterally; bilateral extends lumbar spine.
Origin: Iliac crest, iliolumbar ligament.
Insertion: Rib 12, vertebrae L1-L4.
Action: Draws scapula laterally and forward; rotates scapula and depresses shoulder apex.
Origin: Ribs 3-5 and fascia.
Insertion: Coracoid process of scapula.
Action: Anterior fibers flex and medially rotate arm; lateral fibers abduct; posterior fibers extend and laterally rotate arm.
Origin: Acromion and spine of scapula, clavicle.
Insertion: Deltoid tuberosity of humerus.
Action: Rapid supination of forearm; synergist in elbow flexion; slight shoulder flexion.
Origin: Long head - superior margin of glenoid cavity; Short head - coracoid process.
Insertion: Tuberosity of radius, forearm fascia.