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Thigh Muscles Quiz

Prudence Malinki

MarkMonitor Inc.

edgeone.app

IRT-SG-ACE

ACE administrator

ACE-SG


// comp: "ant" | "med" | "post"
// topic: Origin | Insertion | Nerve Supply | Action
const questions = [
  // ═══════════ ANTERIOR COMPARTMENT ═══════════
  {
    comp:"ant", topic:"Origin",
    text:"What is the origin of the Rectus Femoris (straight head)?",
    options:["Anterior superior iliac spine","Anterior inferior iliac spine","Greater trochanter","Iliac crest"],
    correct:1,
    explanation:"Rectus femoris has two heads — the straight head originates from the anterior inferior iliac spine (AIIS), and the reflected head from the groove above the acetabulum."
  },
  {
    comp:"ant", topic:"Nerve Supply",
    text:"Which nerve supplies ALL four heads of the Quadriceps Femoris?",
    options:["Obturator nerve","Sciatic nerve","Femoral nerve","Superior gluteal nerve"],
    correct:2,
    explanation:"All four parts of quadriceps femoris (rectus femoris, vastus lateralis, vastus medialis, vastus intermedius) are supplied by the Femoral nerve."
  },
  {
    comp:"ant", topic:"Action",
    text:"Which muscle in the anterior compartment performs BOTH flexion of the thigh AND extension of the leg at the knee?",
    options:["Vastus lateralis","Sartorius","Rectus femoris","Vastus intermedius"],
    correct:2,
    explanation:"Rectus femoris is unique among the quadriceps — it crosses two joints, so it extends the leg at the knee AND flexes the hip."
  },
  {
    comp:"ant", topic:"Origin",
    text:"What is the origin of Sartorius?",
    options:["Anterior inferior iliac spine","Posterior superior iliac spine","Anterior superior iliac spine","Iliac crest"],
    correct:2,
    explanation:"Sartorius originates from the Anterior Superior Iliac Spine (ASIS). It is the longest muscle in the body."
  },
  {
    comp:"ant", topic:"Insertion",
    text:"Sartorius inserts into the superior part of the medial surface of the tibia. This insertion is shared with two other muscles, forming the 'Pes Anserinus' (SGS). Which group?",
    options:["Semitendinosus, Gracilis, Sartorius","Semimembranosus, Gracilis, Sartorius","Biceps femoris, Gracilis, Sartorius","Semitendinosus, Semimembranosus, Sartorius"],
    correct:0,
    explanation:"The Pes Anserinus (goose foot) is formed by Semitendinosus, Gracilis, and Sartorius (SGS) — all inserting onto the superior medial tibia."
  },
  {
    comp:"ant", topic:"Action",
    text:"What is the action of Sartorius at the hip and knee?",
    options:["Extension and medial rotation of hip; extension of knee","Flexion and lateral rotation of thigh at hip; flexion of knee","Abduction and medial rotation of thigh; extension of knee","Adduction of thigh; flexion of knee"],
    correct:1,
    explanation:"Sartorius flexes and laterally rotates the thigh at the hip, and flexes the knee. It brings the leg into the cross-legged sitting position."
  },
  {
    comp:"ant", topic:"Origin",
    text:"Vastus lateralis originates from which bony landmarks?",
    options:["Intertrochanteric line and medial lip of linea aspera","Anterior and lateral surfaces of femoral shaft","Greater trochanter and lateral lip of linea aspera","Lesser trochanter and medial lip of linea aspera"],
    correct:2,
    explanation:"Vastus lateralis originates from the greater trochanter and the lateral lip of the linea aspera of the femur."
  },
  {
    comp:"ant", topic:"Origin",
    text:"Psoas major (iliopsoas) originates from:",
    options:["Iliac crest and iliac fossa","Sides of T12–L5 vertebrae, discs, and transverse processes of lumbar vertebrae","Anterior superior iliac spine","Posterior surface of sacrum"],
    correct:1,
    explanation:"Psoas major originates from the sides of T12–L5 vertebrae and discs between them, and the transverse processes of lumbar vertebrae."
  },
  {
    comp:"ant", topic:"Nerve Supply",
    text:"What nerve supplies Psoas major?",
    options:["Femoral nerve","Obturator nerve","Ventral rami of L1–L3 (lumbar plexus)","Sciatic nerve"],
    correct:2,
    explanation:"Psoas major is supplied by ventral rami of L1–L3 from the lumbar plexus (direct branches, NOT the femoral nerve). Iliacus (its partner) is supplied by the femoral nerve."
  },
  {
    comp:"ant", topic:"Insertion",
    text:"Both Psoas major and Iliacus share the same insertion. Where is it?",
    options:["Greater trochanter","Gluteal tuberosity","Lesser trochanter of femur","Pectineal line"],
    correct:2,
    explanation:"Both psoas major and iliacus (together forming iliopsoas) insert into the lesser trochanter of the femur."
  },
  {
    comp:"ant", topic:"Nerve Supply",
    text:"Pectineus has a dual nerve supply. Which TWO nerves supply it?",
    options:["Sciatic and femoral nerves","Femoral and obturator nerves","Obturator and superior gluteal nerves","Femoral and inferior gluteal nerves"],
    correct:1,
    explanation:"Pectineus is uniquely supplied by BOTH the femoral nerve and the obturator nerve — a clinically important dual innervation."
  },
  {
    comp:"ant", topic:"Insertion",
    text:"The four quadriceps muscles share a common insertion. What is it?",
    options:["Head of fibula","Medial condyle of tibia","Base of patella via quadriceps tendon, then patellar ligament to tibial tuberosity","Lateral condyle of tibia via iliotibial tract"],
    correct:2,
    explanation:"All four quadriceps converge into the quadriceps tendon attaching to the base of the patella, continuing as the patellar ligament to the tibial tuberosity."
  },

  // ═══════════ MEDIAL COMPARTMENT ═══════════
  {
    comp:"med", topic:"Nerve Supply",
    text:"Which single nerve supplies MOST muscles of the medial compartment?",
    options:["Femoral nerve","Sciatic nerve","Obturator nerve","Pudendal nerve"],
    correct:2,
    explanation:"The obturator nerve (L2,3,4 ventral division) supplies most medial compartment muscles: gracilis, adductor longus, adductor brevis, pectineus, obturator externus, and the adductor part of adductor magnus."
  },
  {
    comp:"med", topic:"Origin",
    text:"Adductor Longus originates from:",
    options:["Inferior ramus of pubis","Body of pubis","Ischiopubic ramus","Ischial tuberosity"],
    correct:1,
    explanation:"Adductor longus originates from the body of the pubis, just below the pubic crest."
  },
  {
    comp:"med", topic:"Insertion",
    text:"Adductor Longus inserts into:",
    options:["Adductor tubercle of femur","Medial supracondylar line","Middle third of linea aspera of femur","Pectineal line of femur"],
    correct:2,
    explanation:"Adductor longus inserts into the middle third of the linea aspera of the femur."
  },
  {
    comp:"med", topic:"Origin",
    text:"Adductor Magnus has two parts with different origins. Where does the HAMSTRING part originate?",
    options:["Ischiopubic ramus","Body of pubis","Ischial tuberosity","Inferior ramus of ischium"],
    correct:2,
    explanation:"Adductor magnus has two parts — the adductor part from the ischiopubic ramus, and the hamstring part from the ischial tuberosity."
  },
  {
    comp:"med", topic:"Nerve Supply",
    text:"The hamstring part of Adductor Magnus is supplied by which nerve?",
    options:["Obturator nerve","Femoral nerve","Tibial part of sciatic nerve","Common peroneal nerve"],
    correct:2,
    explanation:"The adductor part of adductor magnus is supplied by the obturator nerve, while the hamstring part is supplied by the tibial part of the sciatic nerve — making it functionally part of the posterior compartment."
  },
  {
    comp:"med", topic:"Insertion",
    text:"The hamstring part of Adductor Magnus inserts into the:",
    options:["Linea aspera","Medial supracondylar line","Adductor tubercle","Greater trochanter"],
    correct:2,
    explanation:"The hamstring part of adductor magnus inserts into the adductor tubercle on the medial epicondyle of the femur."
  },
  {
    comp:"med", topic:"Action",
    text:"Gracilis performs which combination of actions?",
    options:["Adducts thigh, extends leg at knee, lateral rotation","Abducts thigh, flexes knee, medial rotation","Adducts thigh, flexes leg at knee, medially rotates leg","Extends thigh, extends leg, lateral rotation"],
    correct:2,
    explanation:"Gracilis adducts the thigh at the hip, flexes the leg at the knee, and medially rotates the leg. It is part of the Pes Anserinus (SGS) insertion."
  },
  {
    comp:"med", topic:"Origin",
    text:"Obturator Externus originates from:",
    options:["Pelvic surface of obturator membrane","Margins of obturator foramen (external surface)","Ischial spine","Greater sciatic notch"],
    correct:1,
    explanation:"Obturator externus originates from the margins of the obturator foramen (external surface of the obturator membrane and surrounding bone)."
  },
  {
    comp:"med", topic:"Insertion",
    text:"Obturator Externus inserts into the:",
    options:["Medial surface of greater trochanter","Adductor tubercle","Trochanteric fossa of femur","Quadrate tubercle"],
    correct:2,
    explanation:"Obturator externus inserts into the trochanteric fossa of the femur. Its action is lateral rotation of the thigh."
  },
  {
    comp:"med", topic:"Action",
    text:"What is the action of the ADDUCTOR PART of Adductor Magnus?",
    options:["Extends thigh only","Adduction and flexion of thigh","Adduction and extension of thigh","Medial rotation only"],
    correct:1,
    explanation:"The adductor part of adductor magnus performs adduction and flexion of the thigh (supplied by obturator nerve), while the hamstring part extends the thigh (supplied by tibial sciatic nerve)."
  },

  // ═══════════ POSTERIOR COMPARTMENT ═══════════
  {
    comp:"post", topic:"Origin",
    text:"Which posterior compartment muscle has TWO heads with DIFFERENT origins?",
    options:["Semitendinosus","Semimembranosus","Biceps femoris","All three hamstrings"],
    correct:2,
    explanation:"Biceps femoris has a long head (ischial tuberosity) and a short head (linea aspera and lateral supracondylar ridge of femur) — the only hamstring with two different origins."
  },
  {
    comp:"post", topic:"Nerve Supply",
    text:"The short head of Biceps Femoris is supplied by:",
    options:["Tibial part of sciatic nerve","Common peroneal part of sciatic nerve","Obturator nerve","Femoral nerve"],
    correct:1,
    explanation:"The short head of biceps femoris is supplied by the common peroneal (fibular) part of the sciatic nerve — making it unique. The long head is supplied by the tibial part of the sciatic nerve."
  },
  {
    comp:"post", topic:"Insertion",
    text:"Biceps femoris inserts into:",
    options:["Medial condyle of tibia","Medial surface of tibia","Head of fibula","Lateral condyle of tibia"],
    correct:2,
    explanation:"Biceps femoris inserts into the head of the fibula. Its action is to flex the knee, rotate it laterally, and extend the thigh at the hip."
  },
  {
    comp:"post", topic:"Insertion",
    text:"Semitendinosus inserts into the superior part of the medial surface of the tibia. Which mnemonic helps remember the Pes Anserinus?",
    options:["SGS — Semitendinosus, Gracilis, Sartorius","SMS — Semimembranosus, Semitendinosus, Sartorius","GBS — Gracilis, Biceps, Sartorius","SSG — Sartorius, Semitendinosus, Gracilis"],
    correct:0,
    explanation:"SGS = Semitendinosus, Gracilis, Sartorius. All three insert at the Pes Anserinus (superior medial tibia). The order from anterior to posterior is Sartorius → Gracilis → Semitendinosus."
  },
  {
    comp:"post", topic:"Origin",
    text:"Both Semitendinosus and Semimembranosus originate from:",
    options:["Linea aspera of femur","Lesser trochanter","Ischial tuberosity","Ischiopubic ramus"],
    correct:2,
    explanation:"Both semitendinosus and semimembranosus originate from the ischial tuberosity. Biceps femoris (long head) also shares this origin."
  },
  {
    comp:"post", topic:"Insertion",
    text:"Semimembranosus inserts into the:",
    options:["Superior part of medial surface of tibia","Posterior part of medial condyle of tibia","Head of fibula","Lateral condyle of tibia"],
    correct:1,
    explanation:"Semimembranosus inserts into the posterior part of the medial condyle of the tibia. Semitendinosus, by contrast, inserts into the superior medial tibia (Pes Anserinus)."
  },
  {
    comp:"post", topic:"Action",
    text:"What actions do BOTH Semitendinosus and Semimembranosus share?",
    options:["Flex hip, extend knee, lateral rotation","Extend thigh at hip, flex leg at knee, medial rotation of knee","Extend thigh, extend knee, lateral rotation","Adduct thigh, flex knee, medial rotation"],
    correct:1,
    explanation:"Both semitendinosus and semimembranosus extend the thigh at the hip, flex the leg at the knee, and medially rotate the knee. Compare with biceps femoris which LATERALLY rotates the knee."
  },
  {
    comp:"post", topic:"Nerve Supply",
    text:"Semitendinosus and Semimembranosus are both supplied by:",
    options:["Common peroneal part of sciatic nerve","Obturator nerve","Tibial part of sciatic nerve","Femoral nerve"],
    correct:2,
    explanation:"Both semitendinosus and semimembranosus are supplied by the tibial part of the sciatic nerve. The long head of biceps femoris is also tibial division; only the short head of biceps is common peroneal."
  }
];

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  else if(pct>=75){title='🌟 Very Good!';   msg='Great work! Review a few details on origins and insertions to perfect your score.';}
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