AZ Cranial Eye Muscles

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    1
    • Superior oblique
    • Origin: Common tendinous ring
    • Insertion: Outer, posterior quadrant of globe
    • Action(s): Depresses, abducts, and medially rotates globe
    • Extraocular Muscle
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    2
    • Levator palpebrae superioris
    • Origin: Sphenoid, lesser wing
    • Insertion: Middle layer of eyelid (tarsus)
    • Action(s): Elevates upper eyelid
    • Extraocular Muscle
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    3
    • Superior rectus
    • Origin: Common tendinous ring
    • Insertion: Anterior, superior globe
    • Action(s): Elevates, adducts, and medially rotates globe
    • Extraocular Muscle
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    4
    • Medial rectus
    • Origin: Common tendinous ring
    • Insertion: Anterior, medial globe
    • Action(s): Adducts globe
    • Extraocular Muscle
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    6
    • Lateral rectus
    • Origin: Common tendinous ring
    • Insertion: Anterior, lateral globe
    • Action(s): Abducts globe
    • Extraocular Muscle
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    5
    • Inferior rectus
    • Origin: Common tendinous ring
    • Insertion: Anterior, inferior globe
    • Action(s): Depresses, adducts, and laterally rotates globe
    • Extraocular Muscle
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    7
    • Inferior oblique
    • Origin: Medial orbital floor
    • Insertion: Outer, posterior quadrant of globe
    • Action(s): Elevates, abducts, and laterally rotates globe
    • Extraocular Muscle
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    4
    Optic Nerve
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    5
    Optic Canal
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    6
    Ophthalmic Artery
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    12
    Inferior Ophthalmic Vein
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    13
    Superior Ophthalmic Vein
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    1
    lamina papyracea
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    2
    frontal bone
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    3
    frontozygomatic suture
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    4
    zygomatic bone
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    5
    maxillary bone
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    6
    infraorbital foramen
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    a
    Lateral rectus muscle
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    b
    Superior rectus muscle
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    c
    Medial rectus muscle
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    d
    Superior oblique muscle
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    e
    Levator palpebrae superioris complex
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    f
    Lacrimal gland
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    g
    Inferior oblique muscle
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    a
    Medial rectus muscle
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    b
    Superior oblique muscle
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    c
    Ophthalmic artery
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    d
    Superior rectus muscle/levator palpebrae superioris complex
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    e
    Dural sheath
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    f
    Superior ophthalmic vein
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    g
    Subarachnoid space
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    h
    Optic nerve
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    i
    Inferior rectus muscle
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    j
    Lateral rectus muscle
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    a
    Superior ophthalmic vein
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    b
    Lateral rectus muscle
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    c
    Inferior rectus muscle
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    d
    Medial rectus muscle
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    e
    Superior oblique muscle
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    f
    Superior rectus muscle/levator palpebrae superioris complex
  42. There are two groups of eye muscles:
    • Intraocular Muscles – control pupil size and the shape of the lens
    • Extraocular Muscles – move the eyelid and globe, can be demonstrated on sectional images.
  43. There are ___ extraocular muscles
    7
  44. The six muscles that move the globe are divided into two groups:
    • Rectus Group (four muscles)
    • ObliqueGroup (two muscles).
  45. Tree fluid-filled chambers:
    • Anterior – located between the cornea and iris
    • Posterior – extends from the posterior aspect of the iris to the vitreous cavity
    • Vitreous – comprises the remaining posterior portion of the globe; filled with aqueous humor (special fluid of the globe)
  46. Superior oblique
    • Extraocular Muscle
    • Origin: Common tendinous ring
    • Insertion: Outer, posterior quadrant of globe
    • Action(s): Depresses, abducts, and medially rotates globe
  47. Levator palpebrae superioris
    • Extraocular Muscle
    • Origin: Sphenoid, lesser wing
    • Insertion: Middle layer of eyelid (tarsus)
    • Action(s): Elevates upper eyelid
  48. Superior rectus
    • Extraocular Muscle
    • Origin: Common tendinous ring
    • Insertion: Anterior, superior globe
    • Action(s): Elevates, adducts, and medially rotates globe
  49. Medial rectus
    • Extraocular Muscle
    • Origin: Common tendinous ring
    • Insertion: Anterior, medial globe
    • Action(s): Adducts globe
  50. Lateral rectus
    • Extraocular Muscle
    • Origin: Common tendinous ring
    • Insertion: Anterior, lateral globe
    • Action(s): Abducts globe
  51. Inferior rectus
    • Extraocular Muscle
    • Origin: Common tendinous ring
    • Insertion: Anterior, inferior globe
    • Action(s): Depresses, adducts, and laterally rotates globe
  52. `Inferior oblique
    • Extraocular Muscle
    • Origin: Medial orbital floor
    • Insertion: Outer, posterior quadrant of globe
    • Action(s): Elevates, abducts, and laterally rotates globe

Card Set Information

Author:
flashsmilenet
ID:
288318
Filename:
AZ Cranial Eye Muscles
Updated:
2014-11-14 03:00:05
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AZ Cranial Eye Muscles
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Description:
AZ Cranial Eye Muscles
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