Anatomy (Bones and Muscles) · MU Sofia

48. Muscles of pelvis.

Covers the muscles of the hip, starting with the iliopsoas group (iliacus, psoas major and psoas minor) and their origins, insertions, nerves, actions and blood supply. It then moves to the superficial gluteal muscles (gluteus maximus, medius, minimus and tensor fasciae latae) and the deep layer, including piriformis, the obturator internus and gemellus muscles, and quadratus femoris. A mnemonic, PIN and PINS, lists the structures passing through the greater sciatic foramen below piriformis.

Inside: 4 sections · 8 labelled pictures · 14 flashcards · 3 min

Topic 46 of 49 in the MU Sofia syllabus for Anatomy (Bones and Muscles) (Medicine, Years 1 and 2). The free AceMed note covers it in 4 sections, about 487 words (3 min of reading), with 14 flashcards.

In this note

  1. HIP JOINT MUSCLES
  2. Iliopsoas group:
  3. Gluteal muscles:
  4. Gluteal muscle

Iliopsoas group:

① iliacus m.

  • O: iliac fossa
  • I: Lesser trochanter of femur
  • I: Femoral n.
  • F: trunk flexion.
  • B.S: iliolumbar, deep circumflex iliac, obturator and femoral art.

② Psoas major m.

  • O: vertebral bodies T12-L4 + intervertebral discs T12-L4 + transverse processes of L1-L5
  • I: Lesser trochanter of femur.
  • I: Ant. rami of spinal nerves L1-L3
  • F: Flexion of the trunk.
  • B.S: Lumbar branch of iliolumbar art.

③ Psoas minor m.:

  • O: Vertebral bodies of T12 & L1 vertebrae.
  • I: iliopubic eminence
  • I: Ant. rami of spinal n. L1
  • F: weak flexion of the trunk.
  • B.S: lumbar arteries.

Gluteal muscles:

→ Superficial layer:

① Gluteus maximus:

  • O: Lateroposterior surface of sacrum & coccyx + gluteal surface of ilium
  • I: Iliotibial tract of fascia lata m. + Gluteal tuberosity of femur
  • N: Inferior gluteal n. *
  • F: thigh abduction (superior pt.) & thigh adduction (inf. pt.)
  • B.S: Inferior + superior gluteal arteries.

② Gluteus medius:

  • O: Gluteal surface of ilium (between anterior & post. gluteal lines).
  • I: Lateral aspect of greater trochanter of femur.
  • N: Superior gluteal n.
  • F: thigh abduction + thigh internal rotation
  • BS: Deep branch of sup. gluteal art. + trochanteric anastomosis
  • ↳ sup. gluteal art + medial & lateral circumflex femoral arteries

③ Gluteus minimus:

  • O: Gluteal surface of ilium (between ant. & inf. gluteal lines)
  • I: Ant. aspect of femur greater trochanter
  • N: Superior gluteal n.
  • F: thigh abduction + internal rotation.
  • B.S: Sup. gluteal art. + trochanteric anastomosis

④ Tensor fascia lata m:

  • O: Ant. iliac crest + Ant. superior iliac spine (ASIS)
  • I: iliotibial tract.
  • N: Superior gluteal n.
  • B.S: femoral art.

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