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External Oblique Muscle

Last update: Aug 28th, 2017

External Oblique Muscle

External Oblique Muscle

External oblique muscle with labels: Deltoid, latissimus dorsi, external oblique, biceps brachii, abdominal aponeurosis, pectoralis major, serratus anterior

External oblique muscle with labels: Pectoralis minor, latissimus dorsi, external oblique, biceps brachii, rectus abdominis, serratus anterior, Linea alba

External oblique muscle with labels: External intercostals, internal intercostals, serratus anterior, external oblique, linea alba, rectus abdominis

External oblique muscle with labels: external oblique, linea alba, internal oblique, abdominal aponeurosis

External oblique muscle with labels: external oblique, linea alba, internal oblique, transversus abdominis, abdominal aponeurosis

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Attachments of External Oblique Muscle: Origin & Insertion

Origin: (proximal attachments)
a. External surfaces of ribs 5-12.

Insertion: (distal attachments)
a. Anterior iliac crest and abdominal aponeurosis to linea alba.

External Oblique highlighted and labeled

External Oblique with labels: Insertion and Origin

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Wish there was an easier way to learn? There is! Learn the anatomy of the external oblique muscle in half the time with this trunk wall muscle anatomy reference chart.

Actions of the abdomen:

a. 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

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Fourth image in animation of a figure with a flexed vertebral column

a. Rotates vertebral column (torso).

First image in animation of a figure with a rotated vertebral column

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Fourth image in animation of a figure with a rotated vertebral column

a. 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

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Fifth image in animation of a figure with lateral flexion

Innervation of External Oblique Muscle:

8-12 intercostal, iliohyogastric, and ilioinguinal nerves.

An Overview of the External Oblique Muscle

Test yourself on external oblique muscle with answers hidden

Test yourself on external 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 external oblique muscle with answers shown:Pectoralis major, latissimis dorsi, serratus anterior, biceps brachii, external oblique, linea alba, rectus abdominis, abdominal aponeurosis

Test yourself on external oblique muscle with answers shown:Pectoralis minor, latissimis dorsi, serratus anterior, biceps brachii, external oblique, linea alba, rectus abdominis, abdominal aponeurosis

Test yourself on external oblique muscle with answers shown: :External intercostals, internal intercostals, serratus anterior, external oblique, linea alba, rectus abdominis, abdominal aponeurosis

Test yourself on external oblique muscle with answers shown:External intercostals, internal intercostals, external oblique, linea alba, rectus abdominis, abdominal aponeurosis

Test yourself on external oblique muscle with answers shown: Internal intercostals, external oblique, linea alba, rectus abdominis, abdominal aponeurosis

Test yourself on external oblique muscle with answers shown: external oblique, linea alba, rectus abdominis, abdominal aponeurosis

Test yourself on external oblique muscle with answers shown: external oblique, linea alba, abdominal aponeurosis

Test yourself on external oblique muscle with answers shown: external oblique, linea alba, internal oblique, abdominal aponeurosis

External Oblique with labels: Insertion and Origin

Test yourself while observing the external oblique muscle anatomy

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