Lumbo-Sacral Plexus

Front 1

What roots make up the entire lumbo-sacral plexus?

Back 1

T12 - S4:

T12

L1-5

S1-4

Front 2

What are the MINOR branches of the LUMBAR PLEXUS?

Back 2

1) ILIOHYPOGASTRIC

2) ILIOINGUINAL

3) GENITOFEMORAL

4) LATEROFEMORAL CUTANEOUS

Front 3

What roots make up the minor branches of the lumbar plexus?

Back 3

T12- L3

Front 4

What 2 minor branches of the LUMBAR plexus share the same roots? What are the roots?

Back 4

Iliohypogastric & Ilioinguinal

(IH and II)

Roots: T12, L1

Front 5

What roots make up the GenitoFemoral (GF) branch of the lumbar plexus?

Back 5

L1, L2

Front 6

What roots make up the Laterofemoral cutaneous (LFC) branch?

Back 6

L2, L3

Front 7

What do the ILIOHYPOGASTRIC and ILIOINGUINAL supply?

Back 7

The lower abdominal wall

Front 8

What does the Genitofemoral (GF) nerve supply?

Back 8

1) The cremaster muscle (controls movement of TESTIS in the scrotum)

2) Sensory to the MEDIAL thigh

Front 9

What does the Laterofemerocutaneous nerve supply?

Back 9

1) Sensory nerve of the LATERAL thigh

Front 10

What are the MAJOR BRANCHES of the Lumbar Plexus?

Back 10

1) Femoral

2) Obturator

2) Lumbosacral trunk (LST)

Front 11

What are the ROOTS of the major branches of the Lumbar plexus?

Back 11

L2-L5

Front 12

Which branches arise from ANTERIOR divisions?

Back 12

Obturator & 1/2 of LST

Front 13

What branches arise from POSTERIOR divisions?

Back 13

Femoral & 1/2 of LST

Front 14

What are the ROOTs of the FEMORAL AND OBTURATOR nerve?

Back 14

L2,3,4

Front 15

What are the roots of the LST nerve?

Back 15

L4, 5

Front 16

What portion of the SCIATIC NERVE does the LST make up?

Back 16

2/5ths

Front 17

What makes up the other 3/5ths of the SCIATIC nerve?

Back 17

The SACRAL SCIATIC nerve (S1,2,3) from the sacral plexus

Front 18

What COMPARTMENT does the FEMORAL NERVE supply?

Back 18

ANTERIOR COMPARTMENT (of the THIGH)

Front 19

Why is this strange in comparison to the forearm?

Back 19

The femoral nerve arises from POSTERIOR DIVISIONS, but it supplies the ANTERIOR COMPARTMENT

Front 20

What muscles are in the ANTERIOR COMPARTMENT that the femoral nerve supplies?

Back 20

Flexors of the HIP

The EXTENSORS of the KNEE

Also supplies one ADDUCTOR: the PECTINUEUS (innervated by both femoral and obturator nerves)

Front 21

What COMPARTMENT does the OBTURATOR NERVE supply?

Back 21

The MEDIAL compartment (of the thigh)

Front 22

What muscles are in the MEDIAL COMPARTMENT of the thigh that the obtuator nerve supplies?

Back 22

The ADDUCTORS (of the thigh/hip)

AND it supplies ONE LATERAL ROTATOR = OBTURATOR EXTERNUS

Front 23

What does the LST supply?

Back 23

Becomes part of the SCIATIC NERVE which supplies the POSTERIOR COMPARTMENT (of the thigh)

Front 24

What muscles in the POSTERIOR COMPARTMENT does the sciatic nerve supply

Back 24

EXTENSORS of the HIP

The FLEXORS (of the KNEE)

(the HAMSTRING COMPARTMENT)

Front 25

What roots do the MAJOR BRANCHES of the SACRAL PLEXUS

Back 25

L4-S4

Front 26

What are the 4 major branches of the sacral plexus

Back 26

1) Superior Gluteal Nerve (SG)

2) Inferior Gluteal Nerve (IG)

3) Sacral Sciatic Nerve (SS)

4) Pudenal Nerve (P)

Front 27

What do the SG, IG and SS supply?

Back 27

The LOWER LIMB

Front 28

What does the Pudenal supply?

Back 28

The GENITALIA

Front 29

How do you draw the major branches?

Back 29

Roots L4, L5, S1, S2, S3, S4, with a 4 branches that reach 3 roots individually, each overlapping

Front 30

What roots make up the SUPERIOR GLUTEAL nerve?

Back 30

L4,L5,S1

Front 31

What does the SUPERIOR GLUTEAL NERVE supply?

Back 31

The Gluteus MAX ,MEDIUS and TENSOR FASCIA LATAE

Also 2 of the LATERAL ROTATORS:

1) Inferior GEMELLUS

2) Quadratus femoris

Front 32

What does the INFERIOR GLUTEAL NERVE supply?

Back 32

The GLUTEUS MAXIMUS

Front 33

What do the MINOR NERVES of the SACRAL PLEXUS supply

Back 33

The LATERAL ROTATORS

Front 34

What are the lateral rotators? (6)

Back 34

1.Piriformis

2.Gemellus superior

3.Obturator Internus

4.Gemellus Inferior

5.Obturator Externus

6.Quadratus femoris

Front 35

Which of the lateral rotators is NOT SUPPLIED BY A SACRAL MINOR NERVE?

Back 35

The OBTURATOR EXTERNUS (supplied by the OBTURATOR NERVE)

Front 36

What is the obturator a major branch of and what are its roots

Back 36

Major branch of the LUMBAR PLEXUS (Roots L2,3,4)

Front 37

What roots supply the PIRIFORMIS?

Back 37

S1,S2

Front 38

What roots supply the SUPERIOR GEMELLUS and the OBTURATOR INTERNUS

Back 38

L4,L5,S1,S2

Front 39

What roots supply the INFERIOR GEMELLUS and the QUADRATUs FEMORIS?

Back 39

L4,L5,S1

Front 40

What division makes up the SCIATIC NERVE?

Back 40

TRICK** Made of both ANTERIOR and POSTERIOR DIVISIONS

Front 41

What does the SCIATIC NERVE divide into (in the popliteal fossa?

Back 41

The TIBIAL nerve

The COMMON PERONEAL NERVE

Front 42

What compartment does the TIBIAL nerve supply?

Back 42

The POSTERIOR Compartment muscles of the leg (the FLEXORS)

Front 43

What compartment does the COMMON PERONEAL supply?

Back 43

Both the ANTERIOR and LATERAL comparment muscles of the leg (the EXTENSORS and EVERTERS)

Front 44

What does the Common peroneal nerve futher split into?

Back 44

SUPERFICIAL and DEEP peroneal nerves

Front 45

What does the SUPERFICIAL peroneal nerve supply?

Back 45

The LATERAL COMPARTMENT muscles of the leg (everters)

Front 46

What does the DEEP PERONEAL NERVE supply?

Back 46

The ANTERIOR COMPARTMENT MUSCLES (of the leg)