Abdominal internal oblique muscle
(Redirected from Musculus obliquus internus abdominis)
Abdominal Internal Oblique Muscle
The Abdominal Internal Oblique Muscle is a key component of the human anatomy, playing a crucial role in the abdominal wall's structure and function. It is one of the flat muscles that contribute to the abdominal musculature, lying just beneath the external oblique muscle and above the transversus abdominis muscle. This muscle is instrumental in various bodily functions, including respiration, posture, and movements of the trunk.
Anatomy[edit | edit source]
The Abdominal Internal Oblique Muscle originates from the thoracolumbar fascia, the iliac crest, and the inguinal ligament. It fans out as it moves anteriorly, inserting into the linea alba, pubic crest, and the lower ribs, typically the last three or four. The fibers of this muscle run perpendicular to those of the external oblique muscle, creating a crisscross pattern that adds strength and stability to the abdominal wall.
Function[edit | edit source]
The primary functions of the Abdominal Internal Oblique Muscle include:
- Assisting in the process of respiration by helping to compress the abdominal cavity, which increases intra-abdominal pressure and aids in forced expiration.
- Contributing to the movement and stabilization of the trunk by facilitating flexion, lateral flexion, and rotation of the spine. When the muscle contracts unilaterally, it causes the trunk to rotate and flex to the same side. Bilateral contraction results in trunk flexion and compression of the abdominal contents.
- Supporting the abdominal organs and maintaining abdominal pressure, which is essential for functions such as defecation, urination, and childbirth.
Innervation[edit | edit source]
The Abdominal Internal Oblique Muscle is innervated by the lower six thoracoabdominal nerves and the first lumbar nerves, which are branches of the spinal nerves. This innervation is crucial for the muscle's motor and sensory functions.
Clinical Significance[edit | edit source]
Injuries or strains to the Abdominal Internal Oblique Muscle can occur due to overuse, sudden movements, or direct trauma. Such injuries are common in athletes and can lead to pain, decreased mobility, and difficulty in performing tasks that involve trunk rotation or flexion. Treatment typically involves rest, physical therapy, and, in severe cases, surgical intervention.
See Also[edit | edit source]
Search WikiMD
Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro / Zepbound) available.
Advertise on WikiMD
WikiMD's Wellness Encyclopedia |
Let Food Be Thy Medicine Medicine Thy Food - Hippocrates |
Translate this page: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
தமிழ்,
తెలుగు,
Urdu,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
বাংলা
European
español,
Deutsch,
français,
Greek,
português do Brasil,
polski,
română,
русский,
Nederlands,
norsk,
svenska,
suomi,
Italian
Middle Eastern & African
عربى,
Turkish,
Persian,
Hebrew,
Afrikaans,
isiZulu,
Kiswahili,
Other
Bulgarian,
Hungarian,
Czech,
Swedish,
മലയാളം,
मराठी,
ਪੰਜਾਬੀ,
ગુજરાતી,
Portuguese,
Ukrainian
Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates Wikipedia, licensed under CC BY SA or similar.
Contributors: Prab R. Tumpati, MD