Ciliary Ganglion

Ciliary Ganglion

Question 1. Give the positions, connections & branches of ciliary ganglion (or) Ciliary Ganglion
Answer:

Ciliary Ganglion Position:

• Ciliary ganglion lies near the apex of the orbit between the optic nerve & the tendons of the lateral rectus muscle
• Ciliary Ganglion Position is related to nasociliary nerve

Ciliary Ganglion Roots:

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Ciliary Ganglion Branches:

• The ganglion gives off 810 short Ciliary nerves which further divide into 1520 branches
• Ciliary Ganglion Branches also contains fibres from the roots of te ganglion

Ciliary ganglion cranial nerve association

Ciliary Ganglion Actions of its branches:

• Narrowing the size of pupil by supplying constrictor muscle
• Increasing the curvature of anterior surface of lens by supplying ciliaris muscle

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Question 2. Vessels of the orbit
Answer:

1. Ophthalmic artery:

• Ophthalmic artery is a branch of the cerebral part of the internal carotid artery
• Ophthalmic artery enters the orbit through the optic canal

Vessels of the orbit Branches:

1. Central artery of retina
2. Branches arising from the lacrimal artery
   • Branches given to the lacrimal gland
   • 2 zygomatic branches
   • Lateral palpebral branches supplying the eyelids
   • A recurrent meningeal branch
   • Muscular branches supplying muscles of orbit
3. Branches arising from the main trunk
   • Posterior ciliary arteries
   • Supraorbital & Supratrochlear
   • Anterior & posterior ethmoidal
   • Medial palpebral
   • Dorsal nasal

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2. Ophthalmic veins:

1. Superior ophthalmic vein
   • Lies above the optic nerve
   • Receives tributaries from branches of ophthalmic artery
   • Drains into cavernous sinus
2. Inferior ophthalmic vein
   • Lies below the optic nerve
   • Receives tributaries from the lacrimal sac, lower orbital muscles & eyelids
   • Joins superior ophthalmic vein
   • Drains into cavernous sinus

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3. Lymphatics:

• Drains into preauricular parotid lymph node