Lps and orbicularis oculi

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Lps and orbicularis oculi

  1. 1. •LPS and Orbicularis oculi Dr.Samia Fatima BY-
  2. 2. Levator Palpebrae Superioris • Insertion: Anterior surface of tarsal plate,a few fibres to skin and superior conjuctival fornix Origin: lesser wing of sphenoid anterior to optic canal • Function : elevation of upper eyelid by contraction Innervation: Occulomotor nerve(III)_superior branch
  3. 3. Unique feature of LPS is a collection of smooth muscle fibres passes from its inferior surface to upper edge of superior tarsus. This group of smooth muscle fibres(sup.tarsal muscle) help maintain eyelid elevation and are innervated by postganglionic sympathetic fibres from sup.cervical ganglion
  4. 4. ORBICULARIS OCULI
  5. 5. Orbicularis Oculi • Palpebral part Origin: medial palpebral ligament Insertion: lateral palpebral raphe Innervation: facial nerve (VII) Function: closes the eyelids gently 2 parts Palpebral part Orbital part
  6. 6. • Orbital part Origin: nasal part of frontal bone;frontal process of maxilla:medial palpebral ligament Insertion: Fibres from an uninterrupted ellipse around orbit Innervation: facial nerve (VII) Function: closes the eyelids forcefully

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