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Medicine Phase 2a Neuro > Nerve lesions > Flashcards

Nerve lesions Flashcards

1
Q

Lesion of Olfactory CN1

A

Loss of smell (anosmia)

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2
Q

Lesion of Optic CN2

A

Different visual field losses depending on the location of the lesion

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3
Q

Lesion of Oculomotor CN3

A

Eye moves down and out due to unopposed action of the superior oblique and lateral rectus muscles
Ptosis (drooping eyelid)
Mydriasis (dilated pupil)

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4
Q

Lesion of Trochlear CN4

A

Diplopia and eye moves down and in

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5
Q

Lesion of Trigeminal CN5

A

Decreased facial sensation and jaw weakness

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6
Q

Lesion of Abducens CN6

A

Eye deviates medially

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7
Q

Lesion of Facial CN7 UMN

A

Asymmetry of lower face with forehead sparing

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8
Q

Lesion of Facial CN7 LMN

A

Asymmetry of upper and lower face
Loss of taste
Hyperacusis
Eye irritation due to decreased lacrimation

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9
Q

Lesion of Vestiulocochlear CN8

A

Deafness and vertigo

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10
Q

Lesion of Glossopharyngeal CN9

A

Decreased gag reflex, uvular deviation away from lesion

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11
Q

Lesion of Vagus CN10

A

Dysphagia
Recurrent laryngeal nerve palsies
Pseudobulbar palsies

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12
Q

Lesion of Accessory CN11

A

Patient cannot shrug and displays weak head movement

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13
Q

Lesion of Hypoglossal CN12

A

Tongue deviates towards the side of weakness during protrusion

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14
Q

Function of olfactory CN1

A

Smell

Sensory

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15
Q

Function of optic CN2

A

Sight

Sensory

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16
Q

Function of oculomotor CN3

A

Motor
Innervates the superior, medial and inferior rectus muscles
Innervates Levator palpebrae superioris, Inferior Oblique, Sphincter Pupillae

17
Q

Function of trochlear CN4

A

Innervates the Superior Oblique muscle

Motor

18
Q

Function of trigeminal CN5

A

Sensation of the face and innervates the muscles of mastication
Test corneal reflex
Motor and sensory in V3, others are sensory

19
Q

Function of abducens CN6

A

Innervates the lateral rectus muscle

20
Q

Function of facial CN7

A 
Motor and sensory
Innervates:
Muscles of facial expression
Stapedius
Posterior belly of the digastric muscle
Stylohyoid
Taste anterior 2/3 tongue
Lacrimal gland
Salivary glands (NOT parotid)
21
Q

Function of Vestibulocochlear CN8

A

Sensory
Sense of sound
Balance

22
Q

Function of Glossopharyngeal CN9

A 
Sensory and motor
Supplies taste (sensory) to posterior 1/3 tongue and innervates the parotids as well as the stylopharyngeus
23
Q

Function of Vagus CN10

A

Sensory and motor
Innervates:
Laryngeal and Pharyngeal muscles (NOT Stylopharyngeus)
Parasympathetic supply to thoracic and abdominal viscera

24
Q

Function of (spinal) Accessory CN11

A

Motor

Innervates Trapezius and Sternocleidomastoid muscles

25
Q

Function of Hypoglossal CN12

A

Motor

Innervates the muscles of the tongue (except the palatoglossal - supplied by Vagus nerve)

Medicine Phase 2a Neuro (28 decks)

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