TBI: CN Damage Flashcards
CN I is only involved in about 7% of all TBIs, and is most commonly damaged with what type of injury?
concussions
Examination of the eyes is crucial for what CNs?
II, III, IV, VI
Which CNs are typically only damaged in very superficial injuries?
III, IV, VI
Intact pupillary function indicates that the injury is above the level of the ____
brainstem
Conjugate gaze palsy is seen with ___ injuries
CNS
Unilateral gaze palsy is seen with ___ injuries
PNS
Tonic downward gaze is seen with severe injury to what 3 areas?
thalamus, midbrain, or pons
Rapid horizontal eye movement is associated with ____
seizures
Monocular blindness and absent pupillary response are symptoms of damage to which CN?
II (optic)
PNS gaze abnormalities are commonly seen with damage to which CN?
VI (abducens)
T/F: oculomotor and trochlear nerve damage is common in TBIs
False! Damage to these nerves is less common. We typically see direct damage of the actual muscle bellies and tendons instead.
When is the trigeminal nerve typically damaged?
peripheral injuries to the area where the divisions leave the orbit
What are some symptoms of trigeminal nerve damage?
loss of sensation to nose, eyebrow, and forehead
When is the facial nerve typically damaged?
peripheral injuries that damage the temporal bone
What are some symptoms of facial nerve damage?
- muscle weakness
- loss of tear production
- dec saliva secretion
- taste