Lumbosacral trunk
Lumbosacral trunk is a part of the human anatomy that is formed by the union of the fourth and fifth lumbar nerves with the first sacral nerve. The lumbosacral trunk is a significant component of the lumbosacral plexus, which is a network of nerve fibers that supplies the lower limb.
Etymology[edit | edit source]
The term "lumbosacral" is derived from the Latin words "lumbus" meaning loin and "sacrum" meaning sacred bone. The term "trunk" in this context refers to a large nerve, artery, or vein, from which smaller branches arise.
Anatomy[edit | edit source]
The lumbosacral trunk is formed anterior to the sacroiliac joint by the union of the whole of the anterior division of the fifth lumbar nerve and a part of that of the fourth. It descends into the pelvis and, under the pyriformis muscle, joins with the first sacral nerve to form the sciatic nerve.
Function[edit | edit source]
The lumbosacral trunk contributes to the innervation of the lower limb. It carries fibers that will become part of the sciatic nerve, which provides motor and sensory innervation to the lower extremity.
Clinical significance[edit | edit source]
Damage to the lumbosacral trunk can result in motor neuron disease, sensory neuron disease, or a combination of both. This can lead to a range of symptoms, including muscle weakness, numbness, and pain in the lower extremities.
Related terms[edit | edit source]
Lumbosacral trunk Resources | |
---|---|
|
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 The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes.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