Psoas, iliacus, tensor fascia latae, rectus femoris and vastus muscles

Lesson 13: Hip Flexors and Anterior Thigh

Study Guide - Quick Reference - Hip Flexors and Anterior Thigh

Note: If you intend to do the activities below do not open the "Study Guide" - all the answers are already filled in. The study guide is just a quick reference tool, similar to flash cards. Great for last-minute prep' before an exam.


In this lecture we will be discussing the hip flexors and muscles of the anterior thigh: Psoas, iliacus, tensor fascia latae, rectus femoris and vastus muscles.


  • Psoas -psoas (n.) 1680s, from Greek psoa (plural psoai) "muscles of the loins." Related: Psoitis.

    Gk. [psoas], the gen. of the feminine noun [psoa], was mistaken by the French anatomist Jean Riolan (1577-1657) for the nom. of a (nonexistent) masculine noun. It was he who introduced this erroneous form into anatomy." (Etymology Online)

  • Iliacus - iliac (adj.) 1510s, "pertaining to the disease ileus or colic," from French iliaque or directly from Late Latin iliacus, from ilium "flank, side, entrails" (see ileum). (Etymology Online)
  • Tensor (n.)muscle that stretches or tightens a part, 1704, Modern Latin agent noun from tens-, past participle stem of Latin tendere “to stretch” (Etymology Online)
  • Fascia (n.) – 1560s, from Latin fascia “a band, bandage, swathe, ribbon,” derivative of fascis“bundle” (Etymology Online)
  • Lataelateral (adj.) early 15c., from Middle French latéral and directly from