Anterior Neck and Abdominal Wall

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Anonymous
ID:
128663
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Anterior Neck and Abdominal Wall
Updated:
2012-01-18 09:19:26
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Anterior Neck Abdominal Wall
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Anterior Neck and Abdominal Wall muscles
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  1. Sternocleidomastoid (SCM)
    • Superior Attachment: Mastoid process and lateral half of superior nuchal line
    • Inferior Attachment: Anterior surface of manubrium and superior surface of medial 1/3 or clavicle
    • Innervation: Spinal root of cranial nerve CN XI and C2-C3
    • Main Actions: contralaterally tilts head to one side, bilaterally flexes neck.
  2. Anterior Scalene Muscle
    • Superior Attachment: Anterior tubercles of TPs of C3-C6
    • Inferior Attachment: First rib
    • Innervation: C5-C7
    • Main Actions: Flexes neck laterally, elevates first rib
  3. Middle Scalene Muscle
    • Superior Attachment: Posterior tubercles of TPs of C2-C7
    • Inferior Attachment: First rib
    • Innervation: C3-C8
    • Main Actions: Flexes neck laterally, elevates first rib
  4. Posterior Scalene Muscle
    • Superior Attachment: Postserior tubercles of TPs of C4-C6
    • Inferior Attachment: Second rib
    • Innervation: C6-C8
    • Main Actions: Flexes neck laterally, elevates second rib
  5. Rectus Abdominis
    • Proximal Attachment: Pubic symphysis and pubic crest
    • Distal Attachment: Xiphoid process and costal cartilages 5-7
    • Innervation: Ventral rami of inferior six thoracic nerves
    • Main Actions: Compresses abdominal viscera and flexes trunk
  6. External Oblique
    • Proximal Attachment: External surfaces of 5th to 12th ribs
    • Distal Attachment: Linea alba, pubic tubercle, and anterior half of iliac crest
    • Innervation: Inferior six thoracic nerves and subcostal nerve
    • Main Actions: Compresses and supports abdominal viscera; flexes and rotates trunk
  7. Internal Abdominal Oblique
    • Proximal Attachment: Thoracolumbar fascia, anterior two thirds of iliac crest, and lateral half of inguinal ligament
    • Distal Attachment: Inferior borders of 10th to 12th ribs, linea alba, and pubis via conjoint tendon
    • Innervation: Ventral rami of inferior six thoracic nerves and first lumber nerve
    • Main Actions: Compresses and supports abdominal viscera; flexes and rotates trunk
  8. Transverse Abdominis
    • Proximal Attachment: Interal surfaces of 7-12 costal cartilages, thoracolumbar fascia, iliac crest, and lateral third of inguinal ligament
    • Distal Attachment: Linea alba with aponeurosis of interal oblique, pubic crest, and pecten pubis via conjoint tendon
    • Innervation: Ventral rami of inferior six thoracic nerves and first lumbar nerve
    • Main Actions: compresses and supports abdominal viscera

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