W6 cranial nerve Flashcards Preview

DOH110 Oral Health sciences 1 > W6 cranial nerve > Flashcards

Flashcards in W6 cranial nerve Deck (15)
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1
Q

What are the 12 cranial nerves?

A

I. Olfactory

II. Optic

III. Oculomotor

IV. Trochlear

V. Trigeminal

VI. Abducens

VII. Facial

VIII. Vestibulocochlear

IX. Glossopharyngeal

X. Vagus

XI. Accessory

XII. Hypoglossal

2
Q

What are the basics of cranial nerves?

A

They belong to the peripheral nervous system.

Covered by meninges.

Motor/Efferent: voluntary; somatic &; brachial.

Sensory/Afferent: involuntary

  • proprioception
  • visceral sensory
  • general sensory
  • Special sensory
3
Q

What is the roman numeral for the Olfactory nerve -Type of nerve, cranial exit, functions?

A

I. Olfactory nerve; Sensory (afferent).

Cranial exit: Foramina on cribriform plate of ethmoid bone. Functions: sense of smell

4
Q

What is the roman numeral for the optic nerve -Type of nerve, cranial exit, functions?

A

II. Optic nerve: sensory (afferent) - Vision.

Cranial exit: optic canal.

Functions: vision

5
Q

What is the roman numeral for the Occulomotor nerve -Type of nerve, cranial exit, functions?

A

III. Occulomotor nerve: Motor (efferent). Somatic & PNS.

Caries preganglionic parasympatetic fibres to cilary ganglion near eye ball.

Cranial exit: exits through the superior orbital fissure (SOF) of spenoid bone.

Functions: motor supply to 4 of 6 extraoccular muscles, parasympathetic constriction of pupil and lens

6
Q

What is the roman numeral for the Trochlear nerve -Type of nerve, cranial exit, functions?

A

IV. Trochlear nerve. Motor (efferent) somatic

Cranial exit: Superior orbital fissure

Functions: innervate the superior oblique muscle of the eye to turn eye downward and medially. Longest pathway!

7
Q

What is the roman numeral for the Trigeminal nerve -Type of nerve, cranial exit, functions?

A

V. Trigeminal; sensory (afferent). Ganglions → 3 main branches Cranial exit:

Functions:

8
Q

What is the roman numeral for the Abducens nerve -Type of nerve, cranial exit, functions?

A

VI. Abducens nerve. Motor (efferent) somatic

Cranial exit: Superior orbital fissure of the spenoid bone

Functions: innervates the lateral rectus of the eye, the abductor of the eye.

9
Q

What is the roman numeral for the Facial nerve -Type of nerve, cranial exit, functions?

A

VII. Facial Nerve;

Special sensory to take anterior 2/3 of tongue.

Motor: muscles of foacial expression, middle ear, stylohyoid muscle, posterior belly of diagastric muscle.

General sensory: small area of skin over ear.

Parasympathetic: Lacrimal, sublingual & submandibular glands

Cranial exit:

Functions:

10
Q

What is the roman numeral for the Vestibulcoclear nerve -Type of nerve, cranial exit, functions?

A

VIII. Vestibulocochlear nerve. Special sensory (afferent)

Cranial exit: internal acoustic meatus of temporal bone.

Functions: The vestibular division is concerned with the maintenance of equilibrium. The cochlear division is conered with hearing

11
Q

What is the roman numeral for the Glossopharyngeal nerve -Type of nerve, cranial exit, functions?

A

IX. Glossopharyngeal; motor (brachial & parasympathetic) sensory (special, general, proprioceptive)

Cranial exit: Juglar foramen

Functions: Motor: Stylopharyngeus

  • Parasympathetic: to the parotid gland
  • Special sensory: posterior third of the tongue
  • Sensory: from the posterior third of the tongue, the pharynx, the middle ear cavity and to the carotid sinus and body. Proprioceptive!
12
Q

What is the roman numeral for the Vagus nerve -Type of nerve, cranial exit, functions?

A

X. Vagus. Motor (efferent) brachial and parasympathetic. Sensory (special, general, proprioception).

Cranial exit: Jugular foramen

Functions:

  • Motor: muscles of pharynx and larynx except stylopharngeus. parasympathetic: smooth muscle of trachea, bronchi, digestive tract and cardiac muscle of heart.
  • Special: taste → epiglottis and plate.
  • General sensory: from skin of the external ear and dura mater of posterior crania fossa from tongue, pharynx, laryn, bronchi, heart, oesophagus, stomach , intestine.
13
Q

What is the roman numeral for the Accessory nerve -Type of nerve, cranial exit, functions?

A

XI. Accessory; motor (somatic)

Cranial exit: Jugular foramen

Functions: Sternocleidomastoid and trapezius

14
Q

What is the roman numeral for the Hypoglossal nerve -Type of nerve, cranial exit, functions?

A

XII. Hypoglossal; motor (somatic)

Cranial exit: Hypoglossal canal

Functions:

  • Motor: Intrinsic and extrinsic muscles of the tongue (except palatoglossus - this is innervated by vagus)
15
Q

What is the mneumonic for the cranial nerves

A
  1. Oh
  2. Oh
  3. Oh
  4. To
  5. Touch
  6. And
  7. Feel
  8. Very
  9. Good
  10. Vaginas
  11. And
  12. Hands

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