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Internal Oblique Muscle

image descriptionInternal Oblique Muscle

Internal oblique muscle with labels: Deltoid, latissimus dorsi, external oblique, biceps brachii, abdominal aponeurosis, pectoralis major, serratus anterior
Internal oblique muscle with labels: Pectoralis minor, latissimus dorsi, external oblique, biceps brachii, rectus abdominis, serratus anterior, Linea alba
Internal oblique muscle with labels: External intercostals, internal intercostals, serratus anterior, external oblique, linea alba, rectus abdominis
Internal oblique muscle with labels: external oblique, linea alba, internal oblique, abdominal aponeurosis
Internal oblique muscle with labels: external oblique, linea alba, internal oblique, transversus abdominis, abdominal aponeurosis
Internal Oblique labeled and highlighted
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image descriptionAttachments of Internal Oblique Muscle: Origin & Insertion

Origin: (proximal attachments)
a. Anterior iliac crest, lateral half of inguinal ligament, and thoracolumbar fascia.

Insertion: (distal attachments)
a. Costal cartilages of ribs 8-12; abdominal aponeurosis to linea alba.

Internal Oblique labeled and highlighted
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Actions of the abdomen:

image descriptiona. Flexes vertebral column (draws thorax downward).

First image in animation of a figure with a flexed vertebral column
Second image in animation of a figure with a flexed vertebral column
Third image in animation of a figure with a flexed vertebral column
Fourth image in animation of a figure with a flexed vertebral column

image descriptionb. Rotates vertebral column (torso).

First image in animation of a figure with a rotated vertebral column
Second image in animation of a figure with a rotated vertebral column
Third image in animation of a figure with a rotated vertebral column
Fourth image in animation of a figure with a rotated vertebral column

image descriptionc. Laterally flexes vertebral column (compresses abdomen).

First image in animation of a figure with lateral flexion
Second image in animation of a figure with lateral flexion
Third image in animation of a figure with lateral flexion
Fourth image in animation of a figure with lateral flexion
Fifth image in animation of a figure with lateral flexion

Innervation of Internal Oblique Muscle:

  • 8-12 intercostal, iliohyogastric, and ilioinguinal nerves.

An Overview of the Internal Oblique Muscle

1b Test yourself on internal oblique muscle with answers shown:Deltoid, pectoralis major, latissimis dorsi, serratus anterior, biceps brachii, external oblique, linea alba, rectus abdominis, abdominal aponeurosis
Test yourself on internal oblique muscle with answers hidden
Test yourself on internal oblique muscle with answers shown:Pectoralis major, latissimis dorsi, serratus anterior, biceps brachii, external oblique, linea alba, rectus abdominis, abdominal aponeurosis
Test yourself on internal oblique muscle with answers shown:Pectoralis minor, latissimis dorsi, serratus anterior, biceps brachii, external oblique, linea alba, rectus abdominis, abdominal aponeurosis
Test yourself on internal oblique muscle with answers shown: :External intercostals, internal intercostals, serratus anterior, external oblique, linea alba, rectus abdominis, abdominal aponeurosis
Test yourself on internal oblique muscle with answers shown:External intercostals, internal intercostals, external oblique, linea alba, rectus abdominis, abdominal aponeurosis
Test yourself on internal oblique muscle with answers shown: Internal intercostals, external oblique, linea alba, rectus abdominis, abdominal aponeurosis
Test yourself on internal oblique muscle with answers shown: external oblique, linea alba, rectus abdominis, abdominal aponeurosis
Test yourself on internal oblique muscle with answers shown: external oblique, linea alba, abdominal aponeurosis
Test yourself on internal oblique muscle with answers shown: external oblique, linea alba, internal oblique, abdominal aponeurosis
Internal Oblique with labels: Insertion and Origin
Test yourself while observing the internal oblique muscle anatomy
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