Anatomy Lower Extremity Unit 2

Front 1

Action origin and insertion of quadratus lumborum?

Back 1

Extends & laterally flexes trunk
-important for balance
Rib 12, transverse processes of
lumbar vertebrae to iliac crest

Front 2

Action origin and insertion:
Psoas major muscle

Back 2

Flexes hip, stabilizes trunk
T12-L5 vertebrae to lesser trochanter

Front 3

Innervation: Psoas major muscle

Back 3

Lumbar plexus L1-L4

Front 4

Action, origin and insertion:
Iliacus muscle

Back 4

Strong hip flexor

Iliac fossa to lesser trochanter (meets with psoas major)

Front 5

Nerve Vertebral Levels and & Innervation:
Subcostal n.

Back 5

T12 anterior ramus

Supplies motor & sensory to
anterior abdominal wall

Front 6

What does the Lumbar plexus give innervation to (generally)

Back 6

Supplies motor & sensory to
abdominal wall & LE

Front 7

Nerve Vertebral Levels and & Innervation: iliohypogastric n.

Back 7

L1

Sensory: skin of superolateral
buttocks and superomedial thigh
(and inguinal and pubic regions)
Motor: abdominal muscles
(int. oblique, transversus abdominis)

Front 8

Nerve Vertebral Levels and & Innervation: ilioinguinal

Back 8

L1

Sensory: skin of superolateral
buttocks and superomedial thigh
(and inguinal and pubic regions)
Motor: abdominal muscles
(int. oblique, transversus abdominis)

Front 9

Nerve Vertebral Levels and & Innervation: genitofemoral n.

Back 9

L1-L2

Femoral branch:
skin of anterosuperior thigh
Genital branch:
skin of genitalia, cremaster m.

Front 10

Nerve Vertebral Levels and & Innervation:
lateral femoral cutaneous n.

Back 10

L2-L3

Sensory: anterolateral thigh

Front 11

Nerve Vertebral Levels and & Innervation:
Femoral n.

Back 11

L2-L4

Sensory: skin of anteromedial thigh,
(also part of leg & foot via the
saphenous n.)
Motor: anterior thigh mm.

Front 12

Nerve Vertebral Levels and & Innervation:
Obturator n.

Back 12

L2-L4

Sensory: medial thigh
Motor: medial thigh mm.

Front 13

Nerve Vertebral Levels and & Innervation:
lumbosacral trunk

Back 13

lumbosacral trunk
Courses over sacral alae
Joins sacral plexus

Front 14

Nerve Vertebral Levels and & Innervation: sciatic nerve

Back 14

L4-S3 anterior rami

Innervates posterior thigh mm.
-branches: leg & foot

Front 15

Nerve Vertebral Levels and & Innervation: Superior gluteal n.

Back 15

L4-S1
Motor: gluteus minimus,
gluteus medius & tensor fascia late

Front 16

Sacral plexus Levels

Back 16

= S1-S4

Front 17

Lumbosacral plexus Levels

Back 17

= L2-S4

Front 18

Divisions of the sciatic nerve and their levels

Back 18

tibial n. (L4-S3): ant. division of ant. rami
common fibular nerve (L4-S2): post. division of ant. rami

Front 19

Nerve Vertebral Levels and & Innervation: Inferior gluteal n.

Back 19

L5-S2

Motor: gluteus maximus

Front 20

Nerve Vertebral Levels and & Innervation: Posterior femoral cutaneous n.

Back 20

S2, S3

Sensory: posterior thigh; also posterior
buttocks (via inferior clunial nn.)

Front 21

Neves to Piriformis

Back 21

(S1, S2)

Front 22

Nerves to Quadratus femoris

Back 22

(L5-S1; maybe L4)

Front 23

Nerves to inferior gemellus

Back 23

(L5-S1; maybe L4)

Front 24

nerves to Obturator internus

Back 24

(L5-S2)

Front 25

nerve levels that supply superior gemellus

Back 25

(L5-S2)

Front 26

Abdominal aorta
-bifurcation

Back 26

L4

Front 27

IVC Level

Back 27

L5

Front 28

Trace Lymph Drainage from Posterior Abdominal Wall

Back 28

Superficial LE to superficial inguinal nodes
Deep LE to deep inguinal nodes
Both drain to:
-external iliac nodes
-common iliac nodes
-lumbar nodes
-lumbar lymphatic trunks
-cisterna chyli
-thoracic duct

Front 29

What is the cutaneous innervation for the following?

Back 29

A) subcostal n.
B)lateral femoral cutaneous n.
C) femoral n.
D) saphenous n.
E)genitofemoral n.
F)obturator n.

Front 30

What is the cutaneous innervation?

Back 30

Front 31

Movement of Piriformis muscle

Back 31

Lateral rotator & stabilizer of hip

Front 32

Muscles that attach to great trochanter do what?

Back 32

Rotate and stabilize the hip

Front 33

superior & inferior gemellus have what function?

Back 33

Lateral rotator & stabilizer of hip

Front 34

obturator internus has what function?

Back 34

Lateral rotator & stabilizer of hip

Front 35

Where does quadratus femoris attach and what is its function?

Back 35

intertrochanteric crest
Lateral rotator & stabilizer of hip

Front 36

obturator externus function & insertion?

Back 36

lateral rotators & stabilizers
trochanteric fossa

Front 37

Tensor fascia lata muscle innervation?

Back 37

Superior gluteal n.

Front 38

Gluteus maximus muscle innervation?

Back 38

Inferior gluteal n.

Front 39

Gluteus medius & minimus mm. innervation?

Back 39

Superior gluteal n.

Front 40

How might Superior gluteal nerve damage present?

Back 40

Walking typified by overcompensation,
leaning trunk over affected side: “waddling gait.” Leaning towards unaffected side know as Trendelenburg sign.

Front 41

What is IT Band Syndrome?

Back 41

Inflammation of IT band over lateral femoral epicondyle and/or greater trochanter caused by overuse.

Front 42

Semitendinosus muscle innervation & vascular supply

Back 42

Sciatic nerve,tibial division
deep artery of the thigh

Front 43

Semimembranosus muscle innervation & vascular supply

Back 43

Sciatic nerve,tibial division
deep artery of the thigh

Front 44

Biceps femoris muscle innervation & vascular supply

Back 44

Sciatic nerve,tibial division for LONG HEAD
Sciatic nerve, fibular division for SHORT HEAD
deep artery of the thigh

Front 45

What muscles protect the sciatic nerve?

Back 45

Long head of biceps femoris the thigh
& gluteus maximus in the gluteal region

Front 46

Adductor magnus muscle, hamstring division:
Innervation & compartment

Back 46

sciatic n. (tibial division)
Posterior compartment

Front 47

What is Pes ansurinus?

Back 47

Goose Foot...
The attachement site of muscles from each of the compartments on the medial condyle of the tibia as follows:
Sartorius (anterior comp)
Gracilis (medial comp)
Semitendinosus (post comp)

Front 48

Superior gluteal n. levels and innervation

Back 48

(L4-S1)
gluteus medius, gluteus minimus, and tensor fascia lata (hip abduction)

Front 49

Inferior gluteal n. levels and innervation

Back 49

(L5-S2) gluteus maximus

Front 50

Post. femoral cutaneous n. levels and innervation

Back 50

(S2-S3) Sensory of inferior buttocks, posterior thigh

Front 51

Sciatic n. levels and terminal branches

Back 51

(L4-S3)
Tibial n. (ant. division)
Common fibular n. (post. division)

Front 52

What is Piriformis syndrome?

Back 52

Sciatic n. compression by piriformis m.
More frequently affects posterior division

Front 53

What is the name of the anterior division of the sciatic nerve?

Back 53

tibial n.

Front 54

What is the name of the posterior division of the sciatic nerve?

Back 54

common fibular n

Front 55

What do the Superior gluteal A. & V. innervate?

Back 55

superficial gluteal muscles

Front 56

Inferior gluteal A. & V. supply what regions?

Back 56

deep gluteal muscles
superior portion of posterior thigh
muscles

Front 57

What vasculature supplies the posterior thigh?

Back 57

Perforating branches of
deep femoral a. & v.