Lumbosacral Plexus Flashcards
what is nerve plexus
branching network of intersecting nerves - made up of anterior (ventral rami) of spinal nerves
autonomic
involuntary actions - heart rate, digestion
somatic
voluntary actions - muscle contractions, skin
iliohypogastric nerve (plexus)
L1
ilioinguinal nerve (plexus)
L1
genito femoral nerve (plexus)
L1-L2
Lateral Cutaneous Nerve (plexus)
L2-L3
Obturator Nerve (plexus)
L2-L4
Femoral Nerve (plexus)
L2-L4
Lumbar Plexus
iliohypogastric n.
ilioinguinal n.
genito fermoral n.
lateral cutaneous n.
Obturator n.
Femoral n.
Sacral Plexus
Superior gluteal n.
Inferior gluteal n.
Posterior cutaneous n.
Sciatic n.
Tibial n.
Common fibular n.
Pudendal n.
superior gluteal nerve (plexus)
L4 - S1
inferior gluteal nerve (plexus)
L5-S2
Posterior cutaneous nerve (plexus)
S1-S3
Sciatic nerve (plexus)
L4-S3
Tibial nerve (plexus)
L4 - S3
Common fibular nerve (plexus)
L4-S2
Pudendal nerve (plexus)
S2-S4
What motor supply to medial thigh muscles ?
Obturator nerver (L2-L4)
What motor supply to anterior thigh muscles?
Femoral Nerve (L2-L4)
True or False: Females are at greater risk for IPBSN damage during hamstring tendon graft harvest?
True
Infrapatellar branch of the saphenous nerve
IPBSN
Lumbosacral trunk
L5 minaly with same contribution from L4
travels along Ala of sacrum
most fibers contribute to common fibular division of sciatic nerve
Most fibers contribute to this during the sciatic nerve split
common fibular division
fascia lata
deep fascia of the thigh
thigh
- specialized for posture and locomotion
compartment
connect to the intermuscualr septa (mostly collagen)
Elastin Fibers/no fat
Coxa valga
greater than 139degree
coxa vara
less than 115degree
oblique angle of the femur put _____ on the femoral neck
strain
true or false: fracture of the femoral neck are less common in elderly individuals
false (they are more common)
Anterior Compartment
-Hip Flexors - Knee Extensors
- innervated by Femoral Nerve
- blood: femoral artery, deep femoral artery and lateral circumflex artery
Anterior compartment muscles
rectus femoris
sartorius
V. lateralis
V. medialis
V. intermedius
sartorius
O: ASIS
I: Medial proximal tibia (pes anserinus)
Inn: Femoral nerve
Blood: Deep femoral artery, lateral femoral circumflex artery
Actions: hip flexion, Abd, ER, knee flexion/IR
Iliacus
O: iliac fossa
I: lesser trochanter of the femur
Inn: femoral nerve
blood: iliolumbar artery
actions: hip flexion, ER, Unilateral -later flexion of trunk: Bilateral - raise trunk from supine position
Psoas major
O: lateral surfaces of vertebrae T12-L4 and costal facets of the vertebrae L1-L5
I:lesser trochanter of the femur
Inn: direct branches of lumbar plexus (L1-L3)
Actions: Hip flexion, ER; unilateral - lateral flexion of trunk - raise trunk from supine position
what makes up the femoral triangle
SIA
Sartorius
Inguinal ligament
Adductor long
what is your floor for the femoral triangle
pectinous
illiopsoas muscles
What are 4 options for a coronary artery bypass graft?
internal thoracic arter
radial artery
gastroepiploic artery
Great saphenous vein
great saphenous starts where? where does it empty to?
ascends on ___ leg and thigh
dorms of the foot
femoral vein
medial
what ligament holds down structures passing anterior to the hip joint during flexion - ASIS to pubic tubercle
inguinal ligament
this nerve has a relation with the retroinguinal space
femoral nerve
macular compartment consist of
iliopsoas muscle
federal nerve
the vascular compartment consist (vascular lacuna)
femoral artery and vein
lymphatics
genitofemoral nerve (femoral branch)
what is the femoral sheath?
continuation of the transversalis and iliopsoas fascia
allows gliding during movement of the thigh
What is the femoral canal ?
medial compartment of the femoral sheath
allows expansion of femoral vein
site of hernias
femoral hernia usually occurs due to?
weak point of the abdominal wall
what happens if the hernia passes through saphenous opening?
It can enlarge
medial compartment
hipp adductors
stabilize the pelvis in Coronal/sagittal planes
INN: obturator nerve
Blood: DFA, LFCA, OA
Medial compartment consist of?
Pectineus
Add. Longus
Add. Brevis
Add. Magnus
Gracilis
Obturator Externus
what goes through Adductor canal
femoral artery
femoral vein
saphenous nerve
what goes through adductor hiatus
Femoral artery
Femoral Vein
anterior branch
longus
brevis
gracilis
pectineus
posterior branch
Magnus (adductor and hamstring portion)
groin injury
strain/sprain /stretching of the proximal attachments of the medial thigh adductors
if tearing occurs - it is typically at the proximal attachment of the muscle
strains of adductor longgus = riders strain
can have ossification of the tendons
due to active adduction of thighs to keep form falling off the horse
