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Fundamentals of clinical anatomy and imaging > Orbit > Flashcards

Orbit Flashcards

1
Q

What is the white portion of the eye?

A

Sclera

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2
Q

What structure determines eye color?

A

Iris

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3
Q

What is the technical name of eyelid?

A

Palpebrae

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4
Q

What is the inner-surface of the eyelid?

A

Conjunctiva

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5
Q

What recesses surround the eyeball?

A

Fornices

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6
Q

What are the steps of the lacrimal system?

A
  1. Lacrimal glands produce tears
  2. Tears course over globe and collect in lacrimal papilla
  3. Lacrimal papilla drain into lacrimal canaliculi
  4. Lacrimal canaliculi drain into lacrimal sac
  5. Lacrimal sac drains into inferior meatus of nose via nasolacrimal duct
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7
Q

What muscles does abducens innervate?

A
  1. Lateral rectus
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8
Q

What muscles does accessory innervate?

A
  1. Trapezius

2. Sternocleidomastoid

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9
Q

What is the clinical significance of long ciliary nerves?

A

They provide the afferent innervation involved in the corneal reflex test (irritating one eye

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10
Q

What is the clinical significance of long ciliary nerves?

A

They provide the afferent innervation involved in the corneal reflex test (irritating one eye stimulates a reflex where both eyes blink)

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11
Q

What is the clinical significance of long ciliary nerves?

A

They provide the afferent innervation involved in the corneal reflex test (irritating one eye stimulates a reflex where both eyes blink).

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12
Q

What does the corneal reflex test check?

A
  1. Trigeminal nerve (sensory)

2. Facial nerve (blink)

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13
Q

What is the function of short ciliary nerve?

A

(Goes through ciliary ganglion)

Autonomic innervation of eye (sympathetic dilates, parasympathetic constricts)

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14
Q

What is the function of long ciliary nerve?

A

(Does not go through ciliary ganglion)

Sensory innervation to eye

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15
Q

What is a symptom of intracranial pressure that can be observed about the eye?

A

Papilledema (swelling of optic nerve disc due to edema of optic nerve caused by obstruction of central retinal veins as they cross subarachnoid space - increasing capillary pressure)

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16
Q

What does the pupillary light test check?

A
  1. Optic (sensory)

2. Oculomotor (pupiloconstriction/ dilation)

17
Q

What muscles do the oculomotor nerve innervate?

A
  1. Superior rectus
  2. Levator palpebrae superioris
  3. Inferior oblique
  4. Inferior rectus
  5. Medial rectus
18
Q

What muscles do the abducens nerves innervate?

A
  1. Lateral rectus
19
Q

What muscles do the trochlear nerve innervate?

A
  1. Superior oblique
20
Q

What nerve controls tearing?

A

Lacrimal nerve (branch of ophthalmic [CNV1])

Fundamentals of clinical anatomy and imaging (10 decks)

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