Formation
βventral rami of L1-S4β
2 components:
a. lumbar plexus (L1-L4) β forms within psoas major anterior to lumbar transverse process
- 6 branches
b. sacral plexus (L4-S4) β forms anterior to piriformis muscle
- 12 main branches
2/
βventral rami of L1-S4β
2 components:
a. lumbar plexus (L1-L4) β forms within psoas major anterior to lumbar transverse process
- 6 branches
b. sacral plexus (L4-S4) β forms anterior to piriformis muscle
- 12 main branches
2/
Lumbar plexus (L1-L4)
Simple βI (twice) Got Lunch On Fridayβ
2 nerves w/ single root
2 nerves w/ double root
2 nerves w/ triple root
3/
Simple βI (twice) Got Lunch On Fridayβ
2 nerves w/ single root
2 nerves w/ double root
2 nerves w/ triple root
3/
Progression of the lumbar root values
1 β Ilioinguinal & Iliohypogastric nerves
1,2 β Genitofemoral nerve
2,3 β Lateral femoral cutaneous nerve
2,3,4 β Obturator & Femoral nerves
4/
1 β Ilioinguinal & Iliohypogastric nerves
1,2 β Genitofemoral nerve
2,3 β Lateral femoral cutaneous nerve
2,3,4 β Obturator & Femoral nerves
4/
Lumbar plexus drawing
1st roots T12 to L4
2nd β§ and FEE
3rd there is something β¬οΈandβ¬οΈthe bowtie
youtu.be via: STEP 0
5/
1st roots T12 to L4
2nd β§ and FEE
3rd there is something β¬οΈandβ¬οΈthe bowtie
youtu.be via: STEP 0
5/
4th Simple βI (twice) Got Lunch On Fridayβ
5th 2 nerves x 1 root, 2 nerves x 2 roots, 2 nerves x 3 roots
6/
5th 2 nerves x 1 root, 2 nerves x 2 roots, 2 nerves x 3 roots
6/
Summary β mnemonic
7/
7/
Summary β table
8/
8/
Sacral plexus
βformed from ventral rami of L4-S4β
Six Pβs and five major branches (SIPPS)
9/
βformed from ventral rami of L4-S4β
Six Pβs and five major branches (SIPPS)
9/
Six Pβs
all of the nerves of the anterior rami (prior to division) start w/ P
PArasympathetic pelvic splanchnic nerves(S2-S4)
PErforating cutaneous nerve(S2-S3); PErineal branch of S4 (S4)
PIriformis (S1-S2)
POsterior femoral cutaneous nerve (S1-S3)
PUdendal nerve (S2-S4)
10/
all of the nerves of the anterior rami (prior to division) start w/ P
PArasympathetic pelvic splanchnic nerves(S2-S4)
PErforating cutaneous nerve(S2-S3); PErineal branch of S4 (S4)
PIriformis (S1-S2)
POsterior femoral cutaneous nerve (S1-S3)
PUdendal nerve (S2-S4)
10/
Five major branches
SIPPS
Sup gluteal; quadratus; inf gem
Inf gluteal; obturator; sup gem
Post cut femoral
Pudendal
Sciatic
youtu.be via: DrawItKnowIt
11/
SIPPS
Sup gluteal; quadratus; inf gem
Inf gluteal; obturator; sup gem
Post cut femoral
Pudendal
Sciatic
youtu.be via: DrawItKnowIt
11/
Sacral plexus drawing
1st roots L4 to S4
2nd SIPPS rule
3rd Below sciatic, the six Pβs
12/
1st roots L4 to S4
2nd SIPPS rule
3rd Below sciatic, the six Pβs
12/
Sacral plexus β summary
13/
13/
How to remember the 12 sacral branches?
1st SIPSS and extras (quadratus&obturator)
2nd Six Pβs; remove the PArasympathetic & PErineal branch
3rd Remember that sciatic is formed by common fibular & tibial
4th add the coccygeal
14/
1st SIPSS and extras (quadratus&obturator)
2nd Six Pβs; remove the PArasympathetic & PErineal branch
3rd Remember that sciatic is formed by common fibular & tibial
4th add the coccygeal
14/
Lumbosacral plexopathy
Lumbar plexus
- weakness of hip flexion and adduction and/or knee extension
vs
Lumbosacral trunk and upper sacral plexus
- foot drop or flail foot
15/
Lumbar plexus
- weakness of hip flexion and adduction and/or knee extension
vs
Lumbosacral trunk and upper sacral plexus
- foot drop or flail foot
15/
NeuroTeach - Content
The blog contains all the threads and videos.
neuronland.blogspot.com
Happy Holidays!
The blog contains all the threads and videos.
neuronland.blogspot.com
Happy Holidays!
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