MUSCLE OF THE KNEE Flashcards

1
Q

what muscles make up the quadriceps?

A

rectus femoris
vastus lateralis
vastus intermedialis
vastus medialis

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2
Q

what is the action of the quadriceps?

A

knee extension

rectus femoris also causes hip flexion

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3
Q

what muscles make up the hamstrings?

A

semimembranosus
semitendonosus
biceps femoris

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4
Q

what is the action of the hamstrings?

A

hip extension and knee flexion

semimem and semiten also cause medial knee rotation
rectus femoris also causes lateral knee rotation

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5
Q

palpate rectus femoris

A

patient supine with hip extended over side of plinth
resist knee extension and hip flexion
palpate from AIIS (below and medial to ASIS) to the base of patella and tibial tubercle

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6
Q

palpate vastus medialis and lateralis

A

model in sitting
resist knee extension
palpate on relavent aspects of anterior thigh to base of patella and then to the tibial tubercle

ankle in dorsiflexion increase strength of contraction

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7
Q

palpate all three muscles

A

prone lying with knee flexed to 50
ask patient to extend hip
palpate from ischial tuberosity to lateral and medial tendons of the knee

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8
Q

palpate semimembranosus and semitendonosus

A

(as in palpation of the whole area) add medial rotation at the knee

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9
Q

palpate biceps femoris

A

(as in palpation of the whole area) add lateral rotation at the knee

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10
Q

function of quadriceps

A

raising the body when going from sit to stand

OR eccentrically from stand to sit

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11
Q

function of hamstrings

A

extension of hip for propulsion in walking

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12
Q

what are the attachments of rectus femoris

A

o: straight head- AIIS
reflected head - above acetabulus
i: base of patella

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13
Q

what are the attachments of vastus lateralis

A

o: inertochanteric line, lower border of greater trochanter, gluteal tuberosity, linea aspera
i: base and lateral border of patella

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14
Q

what are the attachments of vastus medius

A

o: intertrochanteric line, linea aspera and superacondylar line
i: medial border of patella

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15
Q

what are the attachments of vastus intermedius

A

o: upper 2/3rd of anterior and lateral femur
i: base of patella with rectus femoris

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16
Q

what is the nerve supply to the quadriceps?

A

femoral nerve L2, L3 and L4

17
Q

what are the attachments of semitendonosus?

A

o: medial ischial tuberosity
i: upper medial tibia behind gracilis and satorius

18
Q

what are the attachments of semimembranosus?

A

o: lateral ischial tuberosity
i: medial tibial condyle

19
Q

what are the attachments of biceps femoris?

A

o: long head- ischial tuberosity
short head -lower half of linea aspera
i: head of fibula

20
Q

what is the nerve supply to the hamstrings?

A

sciatic nerve - L5, S1, S2