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MSK Exam I > L6 - Anterior And Medial Thigh > Flashcards

L6 - Anterior And Medial Thigh Flashcards

1
Q

What is the nerve root of the obturator nerve?

A

L2-4

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2
Q

What is the nerve root of the sciatic nerve?

A

L4-S3

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3
Q

What is the nerve root of the tibial nerve (of sciatic nerve)

A

L4-S3

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4
Q

What is the nerve root of the common fibular nerve ( of sciatic nerve)?

A

L4-S2

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5
Q

Describe testing the patellar reflex

A

Tests the function of the femoral nerve and spinal cord segments L2-4
The absence or decrease of this reflex is known as Westphal’s sign

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6
Q

What is the calcaneal tendon reflex?

A

Tests the S1 and S1 nerve roots

If the nerve root is cut or compressed the ankle reflex is virtually absent

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7
Q

What is the iliopsoas origin?

A

Lateral portion of centra/bodies of T12-L5

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8
Q

What is the iliopsoas insertion?

A

Lesser trochanter

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9
Q

What is the origin of sartorius muscle?

A

ASIS

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10
Q

What is the insertion of the sartorius?

A

Pes anserinus

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11
Q

What is the pes anserinus?

A

Common insertion for three muscles innervated by three separate nerves
Includes sartorius, gracilis and semitendinosus

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12
Q

What are the functions of the sartorius?

A

Flex, abduct and laterally rotate thigh

Flex leg

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13
Q

Which three muscles are in the anterior thigh?

A

Iliopsoas, sartorius, and quadriceps femoris

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14
Q

What is the origin of the quadriceps femoris?

A

Rectus femoris = AIIS

Vasti = shaft of femur

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15
Q

What is the insertion for the quadriceps femoris?

A

Tibial tuberosity

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16
Q

What is the function of the quadriceps femoris?

A

Vasti extend leg

Rectus extends leg and flexes thigh

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17
Q

The tendons of all quadriceps femoris muscles unite to form what?

A

Quadriceps tendon which continues inferiorly as the patellar ligament

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18
Q

What are the superficial medial thigh muscles (adductors)?

A

Pectineus, adductor longus, adductor brevis, gracilis

19
Q

What is the origin of the pectineus muscle?

A

Pecten line of pubis

20
Q

What is the insertion of the pectineus muscle?

A

Pectineal line just inferior to lesser trochanter

21
Q

What is the pectineus innervated by?

A 
Femoral nerve (occasionally a branch from the obturator nerve) 
Only superficial medial thigh muscle thats innervated by femoral nerve
22
Q

What is the origin of the adductor longus?

A

Body of pubis (inferior to pubic crest)

23
Q

What is the insertion of the adductor longus?

A

Middle 1/3 of Linea aspera

24
Q

What are the superficial medial thigh muscles (except for pectineus) innervated by?

A

Obturator nerve

25
Q

What is the origin of the adductor brevis?

A

Pubis body and inferior ramus

26
Q

What is the insertion for the adductor brevis?

A

Proximal Linea aspera

27
Q

What is the function of the superficial medial thigh muscles?

A

Adducts and flexes thigh

Medially rotate leg (gracilis only)

28
Q

Which muscle is the only adductor to cross the knee?

A

Gracilis

29
Q

What is the origin of the gracilis muscle?

A

Pubis body and inferior ramus

30
Q

What is the insertion site for the gracilis muscle?

A

Superior part of medial surface of tibia (part of pes anserinus)

31
Q

Which muscles are the deep medial muscles of the thigh?

A

Obturator externus and adductor magnus

32
Q

Which deep medial thigh muscles are innervated by the obturator nerve?

A

Obturator externus and adductor portion of adductor magnus

33
Q

What is the origin and insertion of the obturator externus?

A

O: External margin of obturator
I: trochanteric fossa

34
Q

Which muscle is the largest adductor muscle?

A

Adductor magnus

Consists of two parts based on attachments: adductor and hamstring portion

35
Q

Describe the adductor portion of the adductor magnus

A

O: ischiopubic ramus
I: gluteal tuberosity, Linea aspera and medial supracondylar line
Adducts and flexes thigh

36
Q

Describe the hamstrings portion of the adductor magnus?

A

O: ischial tuberosity
I: adductor tubercle (medial epicondyle)
Innervated by tibial division of sciatic nerve
Adducts and extends the thigh

37
Q

Describe the medial femoral septa

A

Adduction

Obturator nerve

38
Q

Describe the posterior femoral septa

A

Flexion

Sciatic nerve

39
Q

Describe the anterior femoral septa

A

Extension

Femoral nerve

40
Q

What innervates all anterior thigh muscles?

A

Femoral nerve

Exception: psoas major is innervated by anterior rami

40
Q

Which anterior thigh muscle is the only one that crosses two joints?

A

Rectus femoris

Flexes thigh and extends leg

40
Q

Which is the only adductor muscle not innervated by the obturator nerve?

A

Pectineus

Innervated by femoral nerve

41
Q

Which adductor is the only one that crosses the knee?

A

Gracilis

MSK Exam I (34 decks)

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