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Head > Adnexa of the eye > Flashcards

Adnexa of the eye Flashcards

1
Q

What is the anatomical name for the 3rd eyelid?

A

Nictitating membrane

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2
Q

What is the space between eyelids when they are open called?

A

Palpebral fissure

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3
Q

What are the 3 layers that make up the eyelid?

A
  • Skin
  • Musculofibrous
  • Palpebral conjunctiva
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4
Q

What is the function of the tarsal gland?

A

Secrete a waxy substance that prevents tears spilling out of the eye

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5
Q

What is the role of the orbicularis oculi muscle of the eye?

A

Closes the eye and sweeps teats passively across the front of the eye keeping it clean and moist

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6
Q

Which nerve supplies sensory supply to the region around the eyes?

A

Trigeminal nerve - ophthalmic and maxillary divisions

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7
Q

Where does innervation of the lacrimal gland come from?

A

Autonomic efferents from the facial nerve

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8
Q

Where does the third eyelid sit at rest?

A

Medial canthus of the eye

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9
Q

What is the periorbital fascia?

A

A cone shaped fibrous tunic surrounding the eye and extraocular muscles

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10
Q

What are the 3 layers that make up the periorbital fascia, from most superficial to most deep?

A

Periorbita
Superficial muscular fascia
Deep muscular fascia

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11
Q

How many extraocular muscles are there?

A

7 total

  • 4 rectus
  • 2 oblique
  • 1 retractor
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12
Q

Name the muscles of the eye that retracts the eyeball?

A

Retractor bulbi

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13
Q

What is the adnexa of the eye?

A

The structures associated with movement, protection and support of the eye

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14
Q

What are the names given to the corners of the eye?

A

Medial and lateral canthus

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15
Q

Name the eyelid closing muscle

A

Orbicularis oculi

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16
Q

The occulomotor nerve supplies which muscle of the eyelid?

A

Levator palpebrae superioris

17
Q

What is the function of the Retractor anguli occuli muscle?

A

Draws the lateral palpebral angle posteriorly

18
Q

Which structures make up the lacrimal apparatus?

A

Lacrimal gland
Small associated glands
Gland of the 3rd eyelid
Lacrimal duct

19
Q

Describe the lacrimal gland

A

A flat , lobulated gland secreting serous and mucous fluid to moisten the eye, and supply the cornea with some nutrients

20
Q

What is the function of the 3rd eyelid?

A

It sweeps across the cornea when the eyeball is retracted by the retractor bulbi muscles

21
Q

What are the functions of the dorsal oblique muscle?

A

Pulls the back of the eye upwards and rotates the eye towards the midline

22
Q

The occulomotor nerve supplies which muscles of the eye?

A

Dorsal, medial and ventral recti muscles, ventral oblique

23
Q

The dorsal oblique is supplied by which nerve?

A

Trochlear nerve

Head (10 decks)

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