MSAK1 - Muscles of the anterior trunk

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agatton
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4180
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MSAK1 - Muscles of the anterior trunk
Updated:
2010-02-18 01:56:40
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Muscles anterior trunk MSAK WCCMT
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Muscles of the anterior trunk
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  1. Pectoralis Major
    • Medial Clavicle, Sternum and Costal Cartilages of Ribs #1-7
    • Lateral Lip of the Bicipital Groove of the Humerus
    • ADDUCTS, MEDIALLY ROTATES and FLEXES the arm at the shoulder jt
    • Medial and Lateral Pectoral
  2. Pectoralis Minor
    • Ribs #3-5
    • Coracoid Process of the Scapula
    • PROTRACTS and DEPRESSES the scapula at scapulocostal jts
    • ELEVATES ribs #2-5 at sternocostal and cosstospinal jts
    • Medial and Lateral Pectoral
  3. Subclavius
    • 1st Rib
    • Clavicle
    • DEPRESSES the clavicle at the sternoclavicular jt
    • ELEVATES the 1st rib at sternocostal and costospinal jts
    • Nerve to Subclavius
  4. External Intercostals
    • In the intercostal spaces of Ribs #1-12, from the inferior border of one rib
    • To the superior border of the rib directly inferior
    • ELEVATES ribs #2-12 at sternocostal and costospinal jts
    • Intercostal Nerves
  5. Internal Intercostals
    • In the intercostal spaces of Ribs #1-12, from the superior border of one rib and it's costal cartilage
    • To the inferior border of the rib and its costal cartilage that is directly superior
    • DEPRESSES ribs #1-11 at sternocostal and costospinal jts
    • Intercostal Nerves
  6. Transversus Thoracis
    • Internal surfaces of the Sternum, Xiphoid Process, and the Adjacent Costal Cartilages
    • Internal surface of Costal Cartilages #2-6
    • DEPRESSES ribs #2-6 at sternocostal and costospinal jts
    • Intercostal Nerves
  7. Rectus Abdominis
    • Crest of the Pubis and Symphysis Pubis
    • Xiphoid Process and the Cartilage of Ribs #5-7
    • FLEXES the trunk at spinal jts
    • POSTERIORLY TILTS the pelvis at the lumbosacral jt
    • COMPRESSES abdominal contents
    • Intercostal Nerves T5-T12
  8. External Abdominal Obliques
    • Anterior Iliac Crest, Pubic Crest and Tubercle, and the Abdominal Aponeurosis
    • Inferior Border of the lower 8 Ribs
    • FLEXES, LATERALLY FLEXES and CONTRALATERALLY ROTATES the trunk at spinal jts
    • POSTERIORLY TILTS the pelvis at lumbosacral jt
    • COMPRESSES abdominal contents
    • Intercostal Nerves T7-T12
  9. Internal Abdominal Obliques
    • Inguinal Ligaments, Iliac Crest and the Thoracolumbar Fascia
    • Lower 3 Ribs and Abdominal Aponeurosis
    • FLEXES, LATERALLY FLEXES and IPSILATERALLY ROTATES the trunk at spinal jts
    • POSTERIORLY TILTS the pelvis at lumbosacral jt
    • COMPRESSES abdominal contents
    • Intercostal Nerves T7-L1
  10. Transversus Abdominis
    • Inguinal Ligament, Iliac Crest, Thoracolumbar Fascia, and the Costal Cartilages of ribs #7-12
    • Abdominal Aponeurosis
    • COMPRESSES the abdominal contents
    • Intercostal Nerves T7-L1
  11. Diaphragm
    • STERNAL PART:Internal Surface of the Xiphoid Process
    • COSTAL PART:Internal Surface of the Lower 6 Ribs and their Costal Cartilages
    • LUMBAR PART:L1-3 on the right and L1-2 on the left
    • Central Tendon of the Diaphragm
    • INCREASES the volume of the thoracic cavity (INSPIRATION)
    • Phrenic Nerve

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