Lumbar Spinal Nerves Flashcards
How many pairs of lumbar nerves are there?
5
Each lumbar nerve root five dies into an _____ and ______ _____ _____
Anterior and posterior primary ramus
The posterior primary rami of lumbar nerves divide into ____ and _____ branches
Medial and lateral
The medial branch of the posterior primary ramus of a lumbar nerve supplies what?
Multifidi
What supply the multifidi in lumbar nerves?
The posterior medial branch of the lumbar nerve
What do the lateral branches of the posterior primary ramus of a lumbar nerve supply?
Erector spinae group
What supply the erector spinae group?
The lateral branches of the posterior primary ramus of lumbar nerves
The anterior primary rami of lumbar nerves contribute to ____ and ___ ______
Lumbar and sacral plexuses
The lumbar spinal nerves have communications with the sympathetic ganglia via what 3 mechanisms?
- 4 lumbar sympathetic ganglia
- White rami communicans with L1, L2, L3 (sometimes)
- Gray rami communicans (all lumbar nerves)
What forms the lumbar plexus?
Anterior primary rami of L1-L3, L4 (sometimes)
The lumbar plexus receives contribution from _____ besides the rami of L1-L4, by way of a communication from the ___ nerve
T12
Via L1 nerve
Muscular branches from the anterior rami of the lumbar plexus supply what muscles?
- Quadratus lumborum
- Paola’s major
- Posts minor
What supply the quadratus lumborum, Psoas major/minor
The muscular branches of the lumbar plexus
L1 supplies?
Quadratus lumborum, psoas minor
L2 supplies?
QL, psoas major/minor
L3 and L4 suppply?
QL, psoas major
What makes up the iliohypogastric nerves?
T12, L1
The iliohypogastric nerve travels ___ and ____ between the ____ and ______.
Anterior and inferior
QL and kidney
After the iliohypogastric nerves travels between the QL and kidney its travels through the ____ _____ and between the ____ ____ _____.
Transverse abdominus, internal abdominal oblique
The iliohypogastric nerve gives off what branch and then continues as what branch?
Lateral cutaneous
Anterior cutaneous branch
What does the anterior cutaneous branch of the iliohypogastric nerve supply?
Skin of pubic region
What supplies the skin of the public region?
Anterior cutaneous branch of the iliohypogastric nerve
The iliohypogastric nerve gives off a lateral cutaneous nerve branch that supplies what?
Posterolateral gluteal region
What supplies the posterolateral gluteal region?
Lateral cutaneous branch of the iliohypogastric nerve