Lumbosacral Plexus Flashcards

1
Q

The lumbosacral plexus is formed by the anterior rami of which vertebrae?

A

L2 to S2
LUMBAR (L2-L4)
and
SACRAL (L4-S2)

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2
Q

The anterior rami split into which 2 devisions?

A

ANTERIOR AND POSTERIOR DIVISIONS

in both plexuses - lumbar (L2-L4) and sacral (L4-S2)

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3
Q

Name the 2 nerves formed by the lumbar plexus?

A

OBTURATOR NERVE
+
FEMORAL NERVE

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4
Q

Name the mm of the medial thigh supplied by the obturator nerve? (5)

A
1/2 ADDUCTOR MAGNUS (anterior fibres)
ADDUCTOR BREVIS
ADDUCTOR LONGUS
GRACILIS
OBTURATOR EXTERNUS
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5
Q

Where does the Obturator nerve supply sensation?

A

MEDIAL INFERIOR THIGH

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6
Q

Name the mm of the anterior thigh supplied by the femoral nerve? (8)

A
PSOAS MAJOR
ILIACUS
SARTORIUS
PECTINEUS
RECTUS FEMORIS
VASTUS MEDIALIS
VASTUS LATERALIS
VASTUS INTERMEDIUS
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7
Q

Name the reflex of the femoral nerve?

A

KNEE JERK - PATELLAR TAP

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8
Q

TRUE or FALSE

The Femoral Nerve provides sensation to most of the thigh, and the medial lower leg.

A

TRUE

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9
Q

Name the 3 nerves formed by the sacral plexus?

A
TIBIAL NERVE
\+
COMMON PERONEAL NERVE
\+
SCIATIC NERVE
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10
Q

The pathway of the sciatic nerve is that is exits pelvis through the greater __________ ___________, passing deep to which muscle?

A
exits SCIATIC FORAMEN
\+
deep to PIRIFORMIS
\+
(proximal to knee splits into lower leg divisions)
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11
Q

Which nerve is responsible for all sensation below the knee?

A

SCIATIC NERVE

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12
Q

List the muscles which represent the motor responsibilities of the Tibial Nerve?

A
TIBIAL NERVE:
GASTROC
SOLEUS
POPLITEUS
PLANTARIS
TIB POST
FDL
FHL
FDB
HALLUCIS BREVIS
INTRINSIC MM OF FOOT
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13
Q

List the muscles which represent the motor responsibilities of the Peroneal Nerve?

A
PERONEAL NERVE:
TIB ANT
EDL
EHL
EDB
PERONEUS TERTIUS
PERONEUS LONGUS
PERONEUS BREVIS
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14
Q

What nerve provides sensation to the anterolateral leg?

A

COMMON PERONEAL NERVE

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15
Q

What nerve provides sensation to the posterolateral leg?

A

SURAL NERVE

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16
Q

What nerve provides sensation to the medial leg?

A

SAPHENOUS NERVE

17
Q

What nerve provides sensation to the dorsum of the foot?

A

COMMON PERONEAL NERVE

18
Q

What nerve provides sensation to the plantar surface of the foot?

A

TIBIAL NERVE

19
Q

What nerve provides sensation to the lateral foot?

A

SURAL NERVE

20
Q

What nerve provides sensation to the medial foot?

A

SAPHENOUS NERVE