TBI: CN Damage Flashcards

1
Q

CN I is only involved in about 7% of all TBIs, and is most commonly damaged with what type of injury?

A

concussions

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2
Q

Examination of the eyes is crucial for what CNs?

A

II, III, IV, VI

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3
Q

Which CNs are typically only damaged in very superficial injuries?

A

III, IV, VI

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4
Q

Intact pupillary function indicates that the injury is above the level of the ____

A

brainstem

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5
Q

Conjugate gaze palsy is seen with ___ injuries

A

CNS

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6
Q

Unilateral gaze palsy is seen with ___ injuries

A

PNS

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7
Q

Tonic downward gaze is seen with severe injury to what 3 areas?

A

thalamus, midbrain, or pons

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8
Q

Rapid horizontal eye movement is associated with ____

A

seizures

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9
Q

Monocular blindness and absent pupillary response are symptoms of damage to which CN?

A

II (optic)

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10
Q

PNS gaze abnormalities are commonly seen with damage to which CN?

A

VI (abducens)

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11
Q

T/F: oculomotor and trochlear nerve damage is common in TBIs

A

False! Damage to these nerves is less common. We typically see direct damage of the actual muscle bellies and tendons instead.

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12
Q

When is the trigeminal nerve typically damaged?

A

peripheral injuries to the area where the divisions leave the orbit

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13
Q

What are some symptoms of trigeminal nerve damage?

A

loss of sensation to nose, eyebrow, and forehead

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14
Q

When is the facial nerve typically damaged?

A

peripheral injuries that damage the temporal bone

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15
Q

What are some symptoms of facial nerve damage?

A
  • muscle weakness
  • loss of tear production
  • dec saliva secretion
  • taste
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