Oculomotor muscles on CT

Each orbit holds seven muscles, all outlined on a head CT scan by TotalSegmentator: four rectus muscles, two oblique muscles, and the levator palpebrae superioris, with both eyeballs, both optic nerves, and the skull alongside. Researchers use these volumes to compare groups, follow change over time, and build reference ranges. On PET or SPECT, uptake can be read in each eye muscle and set beside its size.

Find answers to research questions like: Which eye muscles differ most in volume between groups? Does eye muscle volume go along with how far the eyeball sits forward? How does uptake in the individual eye muscles relate to muscle size?

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Axial slice of head CT, outlined: Skull, Eyeball right, Lateral rectus muscle right, Medial rectus muscle left, Optic nerve left, Eyeball left, Lateral rectus muscle left, Medial rectus muscle right, Inferior rectus muscle left, Optic nerve right
Axial
Sagittal slice of head CT, outlined: Skull, Eyeball right, Lateral rectus muscle right, Levator palpebrae superioris right, Superior rectus muscle right, Inferior oblique muscle right, Inferior rectus muscle right, Optic nerve right
Sagittal
Coronal slice of head CT, outlined: Skull, Eyeball right, Lateral rectus muscle right, Superior oblique muscle right, Levator palpebrae superioris right, Superior rectus muscle right, Medial rectus muscle left, Inferior rectus muscle right, Eyeball left, Lateral rectus muscle left, and 6 more
Coronal

Found in this example

  • Skull
  • Eyeball right
  • Lateral rectus muscle right
  • Superior oblique muscle right
  • Levator palpebrae superioris right
  • Superior rectus muscle right
  • Medial rectus muscle left
  • Inferior oblique muscle right
  • Inferior rectus muscle right
  • Optic nerve left
  • Eyeball left
  • Lateral rectus muscle left
  • Superior oblique muscle left
  • Levator palpebrae superioris left
  • Superior rectus muscle left
  • Medial rectus muscle right
  • Inferior oblique muscle left
  • Inferior rectus muscle left
  • Optic nerve right

Example scan: head CT, TotalSegmentator dataset