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Human Anatomy - Muscular System > Lecture 10 - Muscles Of The Thigh > Flashcards

Lecture 10 - Muscles Of The Thigh Flashcards

1
Q

What are the type of thigh movements ?

A
  • hip flexion/extension & adduction
  • knee flexion/extension & slight amounts of internal/external rotation
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2
Q

What are the 3 compartments of the thigh muscles?

A
  • anterior
  • posterior
  • medial
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3
Q

How many muscles are in the anterior compartment of the thigh muscles?

A
  • 5 muscles
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4
Q

What are the 5 muscles part of the anterior compartment?

A
  • all 5 muscles are innervated by the femoral nerve
  • sartorius
  • Rectus femoris
  • Vastus lateralis
  • Vastus medialis
  • Vastus intermedialias
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5
Q

What is the origin/insertion/Innervation/main action of the sartorius?

A
  • O: Anterior superior iliac spine
  • I: Medial proximal tibia
  • Inn: Femoral nerve
  • MA: Hip flexion, abduction, external rotation, Knee flexion
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6
Q

What is the quadriceps femoris?

A
  • the 4 muscles that make up the quad: the Rectus femoris, the 3 vasti muscles; medialis, lateralis, intermedialis (which wrap around the femur)
  • All muscles insert on the tibial tuberosity via the quadriceps & patellar tendons
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7
Q

What is the origin/insertion/Innervation/main action of the Rectus femoris?

A
  • O: Has 2 heads; Straight - anterior inferior iliac spine & Curved - superior acetabulum
  • I: Tibial tuberosity via the patellar tendon
  • Inn: Femoral nerve
  • MA: Knee extension & Hip flexion
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8
Q

What is the origin/insertion/Innervation/main action of the Vastus lateralis?

A
  • O: Linea aspera & greater trochanter
  • I: Tibial tuberosity via the patellar tendon
  • Inn: Femoral nerve
  • MA: Knee extension
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9
Q

What is the origin/insertion/Innervation/main action of the Vastus medialis?

A
  • O: Linea aspera & Intertrochanteric line
  • I: Tibial tuberosity via the patellar tendon
  • Inn: Femoral nerve
  • MA: Knee extension
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10
Q

What is the importance of the Vastus medialis ?

A
  • prevents lateral dislocation of the patella secondary to the Q-angle & lateral pull of the Vastus lateralis
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11
Q

What is the origin/insertion/Innervation/main action of the Vastus intermedialis ?

A
  • O: Anterior & lateral surfaces of the femur
  • I: Tibial tuberosity via the patellar tendon
  • Inn: Femoral nerve
  • MA: Knee extension
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12
Q

What is the posterior compartment of the thigh muscles?

A
  • also known as the hamstrings
  • Three 2-jointed muscles that cross both the hip & knee (hip extension & knee flexion)
  • Common origin is the ischial tuberosity & All innervated by the sciatic nerve
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13
Q

How many muscles are in the posterior compartment of the thigh muscles ?

A
  • 3
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14
Q

What muscles are in the posterior compartment of the thigh muscles?

A
  • biceps femoris (lateral); which is the only quadriceps muscle that crosses 2 joints
  • semimembranosus (medial)
  • semitendinosus
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15
Q

What is the origin/insertion/Innervation/main action of the biceps femoris?

A
  • O: Has 2 heads; Long head - ischial tuberosity, Short head - linea aspera
  • I: Head of the fibula
  • Inn: Sciatic nerve
  • MA: Hip extension, Knee flexion, & Lateral rotation of a flexed knee
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16
Q

What is the origin/insertion/Innervation/main action of the semimembranosus?

A
  • O: Ischial tuberosity
  • I: Posteromedial tibial condyle (just posterior to the MCL)
  • Inn: Sciatic nerve
  • MA: Hip extension, Knee flexion, & Medial rotation of a flexed knee
17
Q

What is the origin/insertion/Innervation/main action of the semitendinosus?

A
  • O: Ischial tuberosity
  • I: Medial surface of proximal tibia
  • Inn: Sciatic nerve
  • MA: Hip extension, Knee flexion & Medial rotation of a flexed knee
18
Q

What is the medial compartment of the thigh muscles?

A
  • made up of 5 muscles
  • All the muscles cross the hip joint; only one crosses the knee joint (gracilis)
  • Collectively referred to as the hip adductors
19
Q

What are the 5 thigh muscles of the medial compartment

A
  • gracilis
  • pectineus
  • adductor brevis
  • adductor longus
  • adductor Magnus
20
Q

What is the origin/insertion/Innervation/main action of the gracilis?

A
  • O: Body of pubis
  • I: Just below the medial tibial condyle (posterior to sartorius)
  • Inn: Obturator nerve
  • MA: Hip adduction
21
Q

What is the origin/insertion/Innervation/main action of the pectineus?

A
  • O: Superior pubic ramus
  • I: Pectineal line of the femur
  • Inn: Femoral nerve
  • MA: Hip adduction
22
Q

What is the origin/insertion/Innervation/main action of the adductor brevis?

A
  • O: Body of pubis & inferior pubic ramus
  • I: Proximal linea aspera & pectineal line
  • Inn: Obturator nerve
  • MA: Hip adduction
23
Q

What is the origin/insertion/Innervation/main action of the adductor longus?

A
  • O: Body of pubis
  • I: Middle 1/3 linea aspera
  • Inn: Obturator nerve
  • MA: Hip adduction
24
Q

What is the adductor Magnus?

A
  • Large, triangular shape
  • has 2 distinct portions:
  • small (adductor) portion
  • large (hamstrings) portion
25
Q

What is the origin/insertion/Innervation/main action of the smaller (adductor) portion of the adductor Magnus?

A
  • O: Ischiopubic ramus
  • I: Medial supracondylar ridge & linea aspera of the femur
  • Inn: Obturator nerve
  • MA: Hip adduction
26
Q

What is the origin/insertion/Innervation/main action of the larger (hamstrings) portion of the adductor Magnus?

A
  • O: Ischial tuberosity (descends almost vertically)
  • I: Adductor tubercle of femur
  • Inn: Sciatic nerve
  • MA: Powerful hip adduction
27
Q

What is intermuscular spetum?

A
  • Connective tissue that extends from the superficial fascia deep into a muscle group to separate one muscle from another
28
Q

What is the fascia of the thigh?

A
  • Sleeve of connective tissue surrounding the muscles of the thigh
  • maintains the shape of the thigh & enhancing the mechanical function of the muscles of the thigh
  • Thicker proximally & laterally, also thicker around the knee for support
29
Q

What is the pes anserine group?

A
  • Medial group of 3 muscles crossing the knee
  • One muscle from each compartment:
    • Anterior - sartorius
    • Medial - gracilis
    • Posterior - semitendinosus
  • Anterior to posterior (Say Grace before Tea)
30
Q

Which 2 Joint Muscles of the Leg (Thigh) Muscles Cross & Act on 2 Joints?

A
  • Anterior: Sartorius & Rectus femoris
  • Posterior: All 3 hamstring muscles
  • Medially: Gracilis

Human Anatomy - Muscular System (13 decks)

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