The Lumbar Plexus - Gross Anatomy

📌 𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:-   / drgbhanuprakash  
📌𝗝𝗼𝗶𝗻 𝗢𝘂𝗿 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗛𝗲𝗿𝗲:- https://t.me/bhanuprakashdr
📌𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗧𝗼 𝗠𝘆 𝗠𝗮𝗶𝗹𝗶𝗻𝗴 𝗟𝗶𝘀𝘁:- https://linktr.ee/DrGBhanuprakash

Lumbar plexus

The lumbar plexus is a complex neural network formed by the lower thoracic and lumbar ventral nerve roots (T12 to L5) which supplies motor and sensory innervation to the lower limb and pelvic girdle.

origin: ventral rami of T12 to L5

course: formed within the substance of the psoas major muscle, anterior to the lumbar transverse processes

major (terminal) branches
-------------------------------------------
​Iliohypogastric nerve
ilioinguinal nerve
genitofemoral nerve
lateral femoral cutaneous nerve
femoral nerve
obturator nerve

motor supply: lower limb and pelvic girdle

sensory supply: lower anterior abdominal wall, groin, upper thigh and pudenda

Gross anatomy
The branches that arise from the lumbar plexus are:

subcostal nerve: T12
Iliohypogastric nerve: L1
ilioinguinal nerve: L1
genitofemoral nerve: L1, 2
lateral femoral cutaneous nerve: L2, 3
femoral nerve: L2, 3, 4
obturator nerve: L2, 3, 4
lumbosacral trunk: L4, 5
this contributes to the sacral plexus
The branches of the lumber plexus are covered in this mnemonic.

Variant anatomy

Variation in the lumbar plexus appears to be common (~90% in one study) 1:

absent iliohypogastric nerve (~20%)
early branching (within psoas muscle) of the genitofemoral nerve (~20%)
accessory obturator nerve (~10%)

#anatomyoflumbarplexus #lumbarplexusanatomy #lumbarplexusrelations #drgbhanuprakashanatomyvideos #animatedanatomyvideos #animatedmedicalvideos #anatomyanimatedvideos #drgbhanuprakash #mbbs #neetpg #usmlestep1videos #usmlevideos #usmleanatomylectures #