Muscle Origin, Insertion, Action
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Questions and Answers

Qual es le origine de Rectus Abdominis?

  • Pubic Crest and Pubic Symphysis (correct)
  • Linea Alba
  • Outer surfaces of lower 8 ribs
  • Xiphoid process
  • Qual es le insertion de Rectus Abdominis?

  • Lower margin of mandible
  • Linea Alba
  • Intertuburcular groove of humerus
  • Costal cartilages of 5, 6, 7 ribs (correct)
  • Qual es le action de Rectus Abdominis?

  • Depress hyoid bone
  • Compress abdominal wall
  • Stabilizes scapula
  • Flex and rotate vertebral column (correct)
  • Qual es le origine de External Oblique?

    <p>Outer surfaces of lower 8 ribs</p> Signup and view all the answers

    Qual es le action de External Oblique?

    <p>Flexes vertebral column</p> Signup and view all the answers

    Qual es le origine de Internal Oblique?

    <p>Lumbar fascia, iliac crest, inguinal ligament</p> Signup and view all the answers

    Qual es le action de Transverse Abdominis?

    <p>Compress abdominal contents</p> Signup and view all the answers

    Qual es le origine de Platsyma?

    <p>Skin over lower neck, upper lateral chest</p> Signup and view all the answers

    Qual es le action de Sternocleidomastoid?

    <p>Flexes and laterally rotates cervical spine</p> Signup and view all the answers

    Le origine de Latissimus Dorsi es _____

    <p>T6-L5, lower 3-4 ribs, iliac crest, scapula</p> Signup and view all the answers

    Qual es le action de Quadratus Lumborum?

    <p>Both A and B</p> Signup and view all the answers

    Qual es le action de Intercostals?

    <p>Draw ribs together</p> Signup and view all the answers

    Study Notes

    Rectus Abdominis

    • Originates from the pubic crest and pubic symphysis.
    • Inserts at the xiphoid process and the costal cartilages of the 5th, 6th, and 7th ribs.
    • Functions to flex and rotate the vertebral column.

    External Oblique

    • Originates from the outer surfaces of the lower 8 ribs.
    • Inserts into the linea alba via aponeurosis, pubic crest, tubercle, and iliac crest.
    • Acts to flex the vertebral column, compress the abdominal wall, and rotate the trunk laterally.

    Internal Oblique

    • Originates from the lumbar fascia, iliac crest, and inguinal ligament.
    • Inserts into the linea alba, pubic crest, last 3-4 ribs, and costal margin.
    • Functions to flex the vertebral column, compress the abdominal wall, and rotate the trunk.

    Transverse Abdominis

    • Originates from the cartilage of the last 6 ribs, lumbar fascia, iliac crest, and inguinal ligament.
    • Inserts at the linea alba and pubic crest.
    • Works to compress abdominal contents.

    Platsyma

    • Originates from the skin over the lower neck, upper lateral chest, and pectoral muscles.
    • Inserts at the lower margin of the mandible.
    • Functions to tense the neck and depress the mandible.

    Sternohyoid

    • Originates from the sternum (manubrium) and clavicle.
    • Inserts at the lower margin of the hyoid bone.
    • Acts to depress the hyoid bone and larynx.

    Sternocleidomastoid

    • Originates from the sternum (manubrium) and medial point of the clavicle.
    • Inserts at the mastoid process of the temporal bone and superior nuchal line of the occipital bone.
    • Functions to flex and laterally rotate the cervical spine, move the head, and extend the neck.

    Rhomboids

    • Originates from the spinous processes of C7-T1 (minor) and T2-T5 (major).
    • Inserts at the medial border of the scapula.
    • Stabilizes the scapula.

    Trapezius

    • Originates from the occipital bone, ligamentum nuchae, and spinous processes of C7-T12.
    • Inserts continuously along the acromion, spine of scapula, and clavicle.
    • Functions to stabilize, rotate, retract, and raise the scapula.

    Latissimus Dorsi

    • Originates from T6-L5 vertebrae, lower 3-4 ribs, iliac crest, and scapula.
    • Inserts into the intertubercular groove of the humerus.
    • Performs arm extension, adduction, and medial rotation.

    Iliocostalis

    • Originates from the iliac crest, inferior 6 ribs, and ribs 3-6.
    • Inserts at the angles of the ribs and transverse processes of C4-C6.
    • Functions to extend and laterally flex the spine.

    Longissimus

    • Originates from the transverse processes of lumbar through cervical vertebrae.
    • Inserts at the transverse processes of cervical and thoracic vertebrae and the mastoid process.
    • Acts to extend and laterally flex the spine, and to extend the head while turning the face towards the same side.

    Quadratus Lumborum

    • Originates from the iliac crest and lumbar fascia.
    • Inserts at the 12th rib and transverse processes of L1-L4.
    • Functions to flex the vertebral column laterally, maintain upright posture, and assist in forced inspiration.

    Intercostals

    • Originates from the superior surface of the rib above.
    • Inserts into the rib below.
    • Functions to draw the ribs together and depress the rib cage during expiration.

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    Description

    Este quiz tracta le origines, insertiones e actiones de varios muscules, inclusiv le Rectus Abdominis e le External Oblique. Examina tu cognoscentia per identificar le partes e functiones de istos muscules in le corpo humano. Perfecte pro estudantes de anatomia e fisiologia.

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