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Human Anatomy 2024 - Muscular System > Lecture 24 - Muscles Of The Thigh > Flashcards

Lecture 24 - Muscles Of The Thigh Flashcards

1
Q

What are the 3 compartments of the muscles of the thigh?

A
  • anterior
  • posterior
  • medial
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2
Q

How many muscles are in the anterior compartment? What are they?

A
  • 5 muscles total
  • rectus femoris
  • Vastus lateralis/medialis/intermedius
  • sartorius
  • all share a common innervation via the femoral nerve
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3
Q

What is the origin/insertion/innveration/main action of the rectus femoris?

A
  • O: 2 Heads, Straight Head - Anterior Inferior Iliac Spine, Curved Head - Superior Acetabulum
  • I: Tibial tuberosity via the patellar tendon
  • Inn: Femoral nerve
  • MA: Knee extension & hip flexion
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4
Q

What is the origin/insertion/innveration/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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5
Q

What is the origin/insertion/innveration/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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6
Q

What is the origin/insertion/innveration/main action of the Vastus intermedius?

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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7
Q

What is the origin/insertion/innveration/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
  • note: also longest muscle in the body
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8
Q

What is the posterior compartment of the muscles of the thigh?

A
  • Known as the hamstrings
  • Three 2-jointed muscles that cross both the hip & knee
  • Common origin is the ischial tuberosity & all innervated by the sciatic nerve
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9
Q

What are the 3 muscles of the posterior compartment?

A
  • biceps femoris
  • semimembranosus
  • semitendinosus
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10
Q

What is the origin/insertion/innveration/main action of the biceps Femoris?

A
  • O: 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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11
Q

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

A
  • O: Ischial tuberosity
  • I: Posteromedial tibial condyle
  • Inn: Sciatic nerve
  • MA: Hip Extension, knee flexion, medial rotation of a FLEXED knee
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12
Q

What is the origin/insertion/innveration/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
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13
Q

What is the medial compartment of the muscles of the thigh?

A
  • Comprised of 5 muscles
  • All cross the hip joint: Only one (gracilis) also crosses the knee joint
  • Collectively referred to as the hip adductors
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14
Q

What are the 5 muscles of the medial compartment of the muscles of the thigh?

A
  • Gracilis
  • pectineus
  • adductor brevis
  • adductor longus
  • adductor Magnus (smaller & larger portion)
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15
Q

What is the origin/insertion/innveration/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
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16
Q

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

A
  • O: Superior Pubic Ramus
  • I: Pectineal line of the femur
  • Inn: Femoral nerve
  • MA: Hip adduction
17
Q

What is the origin/insertion/innveration/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
18
Q

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

A
  • O: Body of Pubis
  • I: Middle 1/3 linea aspera
  • Inn: Obturator nerve
  • MA: Hip adduction
19
Q

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

A
  • O: Ischiopubic ramus
  • I: Medial supracondylar ridge & linea aspera of the femur
  • Inn: Obturator nerve
  • MA: Hip adduction
20
Q

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

A
  • O: Ischial Tuberosity
  • I: Adductor tubercle of femur
  • Inn: Sciatic nerve
  • MA: Powerful hip adduction
21
Q

What is the intermuscular septum?

A
  • connective tissue that extends from the superficial fascia deep into a muscle groups to separate one muscle from another
22
Q

What is the fascia of the thigh?

A
  • Sleeve of connective tissue surrounding the muscles of the thigh
  • Responsible for maintaining 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
23
Q

What are the femoral triangle boundaries?

A
  • Base: Inguinal ligament
  • Medial: Adductor Longus
  • Lateral: Sartorius
  • Floor (lateral to medial): Iliopsoas, Pectineus, & Adductor Longus
24
Q

What are the femoral triangle contents?

A
  • From lateral to medial:
  • Femoral nerve
  • Femoral artery
  • Femoral vein
  • Lymphatic vessels
25
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
  • Order (anterior to posterior) – “Say Grace before Tea”

Human Anatomy 2024 - Muscular System (12 decks)

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