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Y4R3 - Medicine II 🩺 > S1: Cranial Nerves (VIII, IX, X, XI, XII) > Flashcards

S1: Cranial Nerves (VIII, IX, X, XI, XII) Flashcards

1
Q

Vestibulo-Cochlear Nerve

A
  • Vestibular & Cochlear Parts
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2
Q

Anatomy of Vestibular Nerve

A
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3
Q

Lesiion in Vestibular Nerve

A
  • vertigo, incoordination of the ipsilateral limbs, and spontaneous nystagmus.
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4
Q

Anatomy of Cochlear Nerve

A
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5
Q

Lesion in Cochlear Nerve

A

Tinnitus and deafness may be due to:

  • Tumors: acoustic neurinoma, CPA meningiomar brainstem glioma.
  • Basal meningitis
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6
Q

Glossopharyngeal Nerve

  • Nature
A

Mixed but mainly sensory

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7
Q

Glossopharyngeal Nerve

  • Anatomy
A
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8
Q

Vagus Nerve

  • Nature
A

Mixed but mainly motor.

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9
Q

Vagus Nerve

  • Carries …..
A
  1. Motor fibers to bronchial tree, esophagus, bile ducts, and gall bladder.
  2. Secretory fibers to stomach and pancreas.
  3. Inhibitory fibers to the heart.
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10
Q

Vagus Nerve

  • Visceral sensory fibers carry ….
A

visceral sensation from the pharynx, larynx, bronchi, and esophagus.

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11
Q

Vagus Nerve

  • The somatic sensory fibers carry …..
A

sensation from the ear.

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12
Q

Vagus Nerve

  • The somatic motor fibers arise from …..
A

nucleus ambiguous; supply soft palate, pharynx, and larynx.

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13
Q

Accessory Nerve

  • natire
A

Purely motor nerve.

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14
Q

Accessory Nerve

  • Anatomy of Cranial Part
A
  • Arises from the nucleus ambigus of the medulla
  • Together leave the skull through the jaguar foramen
  • joins the Vagus to supply the pharynx and larynx.
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15
Q

Accessory Nerve

  • anatomy of spinal Part
A
  • Arises from the AHCs of the upper 5 cervical segments of the spinal cord → enter the skull through the F. magnum
  • Together leave the skull through the jaguar foramen
    joins the Vagus to supply the pharynx and larynx.
  • Descends in the neck between the internal carotid artery and the internal jugular vein, to supply the sternomastoid & trapezius muscles.
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16
Q

Lesion in Glossophryngeal Nerve

A

Unilateral paralysis of the gu cranial nerve leads to:

  • Loss of taste & anesthesia over the posterior 1/3 of the tongue.
  • Weakness of movement of pharyngeal wall on side of the lesion
17
Q

Lesion in Vagus Nerve

A

Unilateral or Bilateral

18
Q

Lesion in Vagus Nerve

  • unilateral
A
  1. Dyspnea.
  2. Dysphagia
  3. HOV with nasal tonation
  4. Ipsilateral palatal & pharyngeal paralysis with absence of palatal and pharyngeal reflexes → nasal regurgitation of fluids
19
Q

Lesion in Vagus Nerve

  • Bilateral
A
  1. Dysarthria.
  2. Dysphagia
  3. Nasal regurgitation of fluids
  4. HOV
  5. Paralysis of palatal, pharyngeal and laryngeal muscles
  6. Irregularities ofheart beats and respiration
20
Q

Lesion in Accessory Nerve

A

Spinal Accessory nerve lesion:

  1. Unilateral lesion: causes ipsilateral paresis or paralysis of the sternomastoid and upper part of the trapezius.
  2. Bilaterallesion: produces paralysis of both sternomastoid & both trapezii
21
Q

Lesion in Accessory Nerve

  • Uni
A
  1. Unilateral lesion: causes ipsilateral paresis or paralysis of the sternomastoid and upper part of the trapezius.
22
Q

Lesion in Accessory Nerve

  • Bi
A
  1. Bilateral lesion: produces paralysis of both sternomastoid & both trapezii
23
Q

Anatomy of Hypoglossal Nerve

A
24
Q

Lesion in Hypoglossal Nerve

A
25
Q

Lesion in Hypoglossal Nerve

  • UMNL & Unilateral
A

deviation of the tongue to the opposite side of the lesion (hemiplegic side) on Protrusion

26
Q

Lesion in Hypoglossal Nerve

  • UMNL & Bilateral
A
  • Small, tight, spastic tongue with inability to protrude the tongue, dysarthria, and exaggerated jaw jerk.
27
Q

Lesion in Hypoglossal Nerve

  • LMNL & Unilareral
A

paralysis of the corresponding half of the tongue, wasting + fasciculation and deviation of the tongue to the paralyzed side on protrusion.

28
Q

Lesion in Hypoglossal Nerve

  • LMNL & Bilateral
A

Bilateral paralysis, wasting and fasciculation, with inability to protrudes the tongue and dysarthria

Y4R3 - Medicine II 🩺 (35 decks)

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