Lumbosacral Plexus Flashcards
The lumbosacral plexus is formed by the anterior rami of which vertebrae?
L2 to S2
LUMBAR (L2-L4)
and
SACRAL (L4-S2)
The anterior rami split into which 2 devisions?
ANTERIOR AND POSTERIOR DIVISIONS
in both plexuses - lumbar (L2-L4) and sacral (L4-S2)
Name the 2 nerves formed by the lumbar plexus?
OBTURATOR NERVE
+
FEMORAL NERVE
Name the mm of the medial thigh supplied by the obturator nerve? (5)
1/2 ADDUCTOR MAGNUS (anterior fibres) ADDUCTOR BREVIS ADDUCTOR LONGUS GRACILIS OBTURATOR EXTERNUS
Where does the Obturator nerve supply sensation?
MEDIAL INFERIOR THIGH
Name the mm of the anterior thigh supplied by the femoral nerve? (8)
PSOAS MAJOR ILIACUS SARTORIUS PECTINEUS RECTUS FEMORIS VASTUS MEDIALIS VASTUS LATERALIS VASTUS INTERMEDIUS
Name the reflex of the femoral nerve?
KNEE JERK - PATELLAR TAP
TRUE or FALSE
The Femoral Nerve provides sensation to most of the thigh, and the medial lower leg.
TRUE
Name the 3 nerves formed by the sacral plexus?
TIBIAL NERVE \+ COMMON PERONEAL NERVE \+ SCIATIC NERVE
The pathway of the sciatic nerve is that is exits pelvis through the greater __________ ___________, passing deep to which muscle?
exits SCIATIC FORAMEN \+ deep to PIRIFORMIS \+ (proximal to knee splits into lower leg divisions)
Which nerve is responsible for all sensation below the knee?
SCIATIC NERVE
List the muscles which represent the motor responsibilities of the Tibial Nerve?
TIBIAL NERVE: GASTROC SOLEUS POPLITEUS PLANTARIS TIB POST FDL FHL FDB HALLUCIS BREVIS INTRINSIC MM OF FOOT
List the muscles which represent the motor responsibilities of the Peroneal Nerve?
PERONEAL NERVE: TIB ANT EDL EHL EDB PERONEUS TERTIUS PERONEUS LONGUS PERONEUS BREVIS
What nerve provides sensation to the anterolateral leg?
COMMON PERONEAL NERVE
What nerve provides sensation to the posterolateral leg?
SURAL NERVE
