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Anatomy > Thigh Muscles > Flashcards

Thigh Muscles Flashcards

1
Q

Quadriceps Components?

A

Rectus femoris
Vastus medialis
Vastus intermedius
Vastus lateralis

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2
Q

Rectus femoris IO Action Innervation

A

Origin:
* Anterior inferior iliac spine
* Superior part of the acetabulum
Insertion:
* Tibial tuberosity and the patella via the quadriceps tendon

Action
* Flexion of femur at hip joint
* Extension of leg at knee joint

Innervation
* Femoral nerve

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3
Q

Vastus medialis IO Action Innervation

A

Origin:
* Intertrochanteric line and medial lip of linea aspera of femur
Insertion:
* Medial aspect of quadriceps tendon
* Medial border of the patella

Action
* Extension of leg at knee joint

Innervation
* Femoral nerve

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4
Q

Vastus intermedius IO Action Innervation

A

Origin:
* Upper 2/3 of anterior and lateral surfaces of the femur
Insertion:
* Deep surface of quadriceps tendon
* Lateral border of the patella

Action
* Extension of leg at knee joint

Innervation
* Femoral nerve

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5
Q

Vastus lateralis IO Action Innervation

A

Origin:
* Greater trochanter and lateral lip of linea aspera
Insertion:
* Lateral aspect of quadriceps tendon
* Lateral border of the patella

Action
Extension of leg at knee joint

Innervation
Femoral nerve

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6
Q

Sartorius IO Action Innervation

A

Origin:
* Anterior superior iliac spine
Insertion:
* Medial part of the tibia near the tibial tuberosity

Action
* Flexion of femur at hip joint
* Abduction of femur at hip joint
* Lateral rotation of femur at hip joint
* Flexion of leg at knee joint
* Medial rotation of leg at knee joint

Innervation
* Femoral nerve

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7
Q

Pectineus IO Action Innervation

A

Origin:
* Pecten pubis and adjacent bone of pelvis
Insertion:
* Posterior aspect of proximal femur on pectineal line

Action
Considered a transitional muscle between the anterior thigh and medial thigh compartments
* Flexion of the femur at the hip
* Adduction of the femur at the hip

Innervation
* Femoral nerve
* May receive branch from Obturator nerve

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8
Q

Adductor longus IO Action Innervation

A

Origin:
* External surface of body of pubis
Insertion:
* Linea aspera on middle 1/3 of shaft of femur

Action
* Adduction of femur at hip joint
* Flexion of femur at hip joint
* Lateral rotation of femur at hip joint

Innervation
* Obturator nerve

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9
Q

Adductor brevis

A

Origin:
* External surface of body of pubis
* Inferior ramus of the pubis
Insertion:
* Posterior surface of proximal femur and upper 1/3 of linea aspera

Action
* Adduction of femur at hip joint
* Flexion of femur at hip joint

Innervation
* Obturator nerve

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10
Q

Adductor magnus IO Innervation

A

Origin:
* Adductor part: Ischiopubic ramus

  • Hamstring part: Ischial tuberosity

Insertion:
* Adductor part: Posterior surface of proximal femur; Linea aspera; Medial supracondylar line of the femur

  • Hamstring part: Adductor tubercle of the femur; Medial supracondylar line of the femur

Innervation
Adductor part:
* Obturator nerve

Hamstring part:
* Tibial division of sciatic nerve

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11
Q

Adductor magnus Action

A
  • Adduct of femur at hip joint
    Adductor part:
  • Flexion of femur at hip joint
    Hamstring part:
  • Extension of femur at hip joint
  • Lateral rotation of femur at hip joint
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12
Q

Gracilis IO Action Innervation

A

Origin:
* Body of inferior ramus of pubis
Insertion:
* Medial surface of proximal tibia

Action
* Flexion of femur at hip joint
* Adduction of femur at hip joint
* Flexion of leg at knee joint
* Medial rotation of leg at knee joint

Innervation
* Obturator nerve

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13
Q

Obturator externus IO Action Innervation

A

Origin:
* Outer surface of obturator membrane
* Superior and inferior pubic rami
Insertion:
* Trochanteric fossa of femur

Action
* Adduction of femur at hip joint
* Lateral rotation of femur at hip joint
* Holds head of femur in acetabulum

Innervation
* Obturator nerve

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14
Q

Hamstrings Lateral to Medial

A

Biceps femoris, Semitendinosus, Semimembranosus

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15
Q

Semitendinosus IO Action Innervation

A

Origin:
* Ischial tuberosity
* Sacrotuberous ligament
Insertion:
* Medial surface of the proximal tibial

Action
* Extension of femur at hip joint
* Flexion of leg at knee joint
* Medial rotation of leg at knee joint

Innervation
* Tibial division of sciatic nerve

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16
Q

Semimembranosus IO Action Innervation

A

Origin:
* Outer surface of the ischial tuberosity
Insertion:
* Medial tibial condyle
* Oblique popliteal ligament
* Popliteal fascia

Action
* Extension of femur at hip joint
* Flexion of leg at knee joint
* Medial rotation of leg at knee joint

Innervation
* Tibial division of sciatic nerve

17
Q

Biceps femoris IO Action Innervation

A

Origin:
* Long head (pictured): Ischial tuberosity; Sacrotuberous ligament
* Short head: Lower ½ of lateral lip of linea aspera; Lateral supracondylar line of femur
Insertion:
* Head of the fibula
* Lateral condyle of the tibia

Action
* Extension of femur at hip joint
* Flexion of leg at knee joint
* Lateral rotation of leg at knee joint

Innervation
Long head:
* Tibial division of sciatic nerve
Short head:
* Common fibular division of sciatic nerve

18
Q

Femoral Triangle borders

A

Base (superiorly): Inguinal ligament
Medially: adductor longus
Laterally: sartorius
Floor: iliopsoas (laterally)
pectineus (medially)
Roof: fascia, subcutaneous tissue and skin

19
Q

Femoral triangle content

A

Medial to lateral: VAN
Femoral Vein
Femoral Artery
Femoral Nerve
Lateral cutaneous nerve of the thigh
Deep Inguinal Lymph nodes

Anatomy (10 decks)

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