Term
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Definition
| what rami create the lumbosacral plexus |
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Term
| bundle of fibers from L4 and L5 called the lumbosacral trunk |
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Definition
| how are the lumbar plexus and sacral plexus joined? |
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Term
| each ventral rami has and anterior and posterior divison |
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Definition
| what are the divisions of the lumbosacral trunk, and where are they? |
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Term
| ventral musc= posterior/medial compartments |
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Definition
| developmentally the ventral muscle groups come to lie in the ____ and ___ compartments in the leg |
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Term
| dorsal musc = anterior and lateral comparments |
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Definition
| developmentally the dorsal muscle groups come to lie in the ____ and ___ compartments in the leg |
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Term
|
Definition
| T12 ventral rami forms this |
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Term
|
Definition
| what rib forms the upper border of the lumbosacral plexus? |
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Term
| ileohypogastric and ileoinguinal |
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Definition
| what nerves come out of L1? |
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Term
| ileohypogastric nerve (L1) |
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Definition
| this innervates the skin below the iliac crest and transversus abdominus and internal oblique |
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Term
|
Definition
innervates the skin of the inner thigh, scrotum in males, and labia majorum in females
motor: transversus abdominus and internal oblique |
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Term
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Definition
| innervates lowest part of external oblique and skin over the anterior superior iliac spine |
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Term
|
Definition
| the lumbosacral plexus comes out through what muscle? |
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Term
|
Definition
this nerve only innervates muscle in males (cremaster muscle) BUT does the SKIN of the
- anterior upper thigh and scrotum of males
- mons pubis and anterior labium majorus in females |
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Term
|
Definition
| this nerve forms form L1 and L2 |
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Term
| lateral cutaneous nerve to thigh (L2 and L3?) |
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Definition
| pregnancy, low riding tight jeans, or a weight belt can trap/compress this nerve and stretch it causing parasthesia on the lateral thigh |
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Term
| lateral cutaneous nerve to thigh |
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Definition
| this nerve comes from L2 and L3 |
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Term
|
Definition
| divides the trunk and lower limb |
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Term
|
Definition
| vessels of the lower limb come out below this structure but the spermatic cord comes out above it |
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Term
|
Definition
| anterior divison of L2,L3,L4 |
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Term
|
Definition
| posterior divisions of L4 & L5 |
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|
Term
superior gluteal n.
innervates gluteas medius and minimus + tensor fascia latae (no sensory) |
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Definition
| the nerve formed from the L4, L5, S1 posterior divison innervates what? |
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|
Term
inferior gluteal nerve
-gluteas maximus (no sensory) |
|
Definition
| the nerve formed from L5, S1, S2 posterior divisions innervates what? |
|
|
Term
|
Definition
formed from anterior and posterior divisions of S1, S2, S3, also fibers from L4 & L5
-usually splits in distal thigh, but with an anomaly splits in glutes |
|
|
Term
| tibial and common peroneal |
|
Definition
| what do the divisions of the sciatic nerve split into? |
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Term
|
Definition
| all anterior(ventral) division fibers of the sciatic nerve (L4-S3) become this |
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|
Term
| common peroneal division (common fibular division) |
|
Definition
| dorsal/posterior division fiber component of the sciatic nerve(L4-S2) becomes this |
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|
Term
motor: hamstrings, posterior leg, intrinsic foot muscles
sensory: sole of foot |
|
Definition
| motor and sensory innervation of the tibial division/nerve |
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|
Term
motor: short head of biceps femoris (1/2 thigh muscle) + lateral and anterior compartements of leg
sensory: lateral leg and dorsum of foot |
|
Definition
| motor/sensory innervation of common peroneal/fibular division |
|
|
Term
| genital branch of genitofemoral nerve |
|
Definition
| this nerve follows the spermatic cord to innervate cremaster muscle |
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Term
|
Definition
| iliohypogastic nerve comes through what muscle |
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Term
|
Definition
| ilioinguinal nerve comes up over what structure? |
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Term
|
Definition
| L1 + L2 fibers, pierces then runs anterior to psoas major |
|
|
Term
| lateral femoral cutaneous nerve |
|
Definition
| L2 and L3 fibers, passes in small gap below inguinal ligament |
|
|
Term
|
Definition
| runs from anterior superior iliac spine to pubic bone |
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Term
|
Definition
| forms from inferior edge of external abdominal oblique |
|
|
Term
| it comes out just deep to the ligament where the ligament attaches to the illium (susceptible to pinching in pregnancy/weightbelt/jeans) |
|
Definition
| where does the lateral femoral cutaneous n to thigh travel in relation to the inguinal ligament? |
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Term
|
Definition
| has little sensory(upper medial thigh), mostly motor to the medial compartment of the thigh (adductors of hip and thigh) |
|
|
Term
| the obturator artery and vein (supplies same area as nerve) |
|
Definition
| what is the obturator nerve bundled with as it passes through the obturator foramen |
|
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Term
|
Definition
passes lateral to psoas major, deep to the inguinal ligament then enters thigh and breaks into motor and sensory branches
motor: anterior compartment of thigh
sensory: anterior thigh and medial leg (LARGE sensory area) |
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Term
|
Definition
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Term
|
Definition
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|
Term
| posterior cutaneous nerve to thigh (S1,S2, S3) |
|
Definition
| innervates the largest area of skin for a cutaneous nerve on the whole body |
|
|
Term
| below inguinal ligament (at t12 level) |
|
Definition
| L1 dermatome test location |
|
|
Term
| mid way down anterior thigh |
|
Definition
| L2 dermatome test location |
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Term
|
Definition
| L3 dermatome test location |
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Term
|
Definition
| L4 dermatome test location |
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Term
|
Definition
| L5 dermatome test location |
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|
Term
|
Definition
| S1 dermatome test location |
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Term
|
Definition
| S2 dermatome test location |
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Term
|
Definition
| S3 dermatome test location |
|
|
Term
| perianal skin (coencentric) |
|
Definition
| S4,S5 dermatome test location |
|
|
Term
hip flexion: L2,L3
hip extension: L4, L5 (+ S1)
knee extension: L3,L4
knee flexion: L5, S1
Ankle dorsiflexion: L4,L5
Ankle plantar flexion: S1,S2 |
|
Definition
| myotomes: draw the circles |
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