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MSK-1 > LE muscle innervations and actions > Flashcards

LE muscle innervations and actions Flashcards

1
Q

What is the origin and insertion of iliacus m?

A

O: iliac crest/fossa and ala of sacrum
I: tendon of psoas major, lesser trochanter

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2
Q

What is the Innervation of Psoas major?

A

Anterior rami of lumbar Nerves L1-L3

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3
Q

What is the action of obturator externus?

A

laterally rotates thigh

steadies head of femur in acetabulum

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4
Q

What is the action of sartorius M?

A

flexes, abducts, and laterally rotates thigh at hip
flexes leg at knee
(think of cobbler thing)

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5
Q

What is the innervation of the hamstring part of adductor magnus m?

A

tibial part of sciatic n

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6
Q

What is the origin and insertion of psoas major?

A

O: T12-L5 vertebra
I: lesser trochanter of femur

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7
Q

What muscles make up quadriceps femoris?

A

rectus femoris
vastus lateralis
vastus intermedius
vastus medialis

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8
Q

What is the Action of Pectineus M?

A

Adducts and flexes thigh

assists w/ medial rotation of thigh

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9
Q

What is the action of adductor longus?

A

adducts thigh

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10
Q

What muscles does the Femoral N innervate?

A 
(Some questions I ponder)
Sartorius
quadriceps femoris
Iliacus
Pectineus
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11
Q

What is the action of adductor magnus?

A

adducts thigh
adductor part also flexes thigh
hamstring part also extends thigh

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12
Q

What is the action of gracilis m?

A

adducts thigh

flexes and helps medially rotate leg

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13
Q

What is the action of adductor brevis?

A

adducts thigh

flexes thigh to some extent

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14
Q

Of iliopsoas, which muscle is medial?

A

psoas

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15
Q

what is the action of quadriceps femoris?

A

extend leg at knee joint

rectus femoris also steadies hip joint and helps iliopsoas flex thigh

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16
Q

What is the N and A for Sartorius M?

A

Femoral A and N

17
Q

What is the innervation of Iliacus m?

A

femoral N

18
Q

What muscles does the obturator n innervate?

A 
Medial thigh compartment:
adductor longus and brevis
adductor part of adductor magnus
gracilis
obturator externus
19
Q

What is the action of Psoas major and iliacus?

A

act together to flex and stabilize thigh at hip

psoas major also postural muscle that helps control deviation of trunk

20
Q

What is the Innervation and Artery of Pectineus M.?

A

Femoral N

Obturator A.

MSK-1 (28 decks)

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