Accepted
at 3:07 a.m. Nov, 01, 2023
by
Cameron
Author:
Dylan
Type of change:
Other
Rationale for change
Better phrasing mnemonic - "Cant see the floor without four" rhymes and flows better
Before
After
Extra
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Text
Which cranial nerve lesion presents with difficulty walking down stairs?
{{c1::CN IV (trochlear)}}
Lecture Notes
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Missed Questions
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Pathoma
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Boards and Beyond
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First Aid
Sketchy
Sketchy 2
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Sketchy Extra
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Picmonic
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Pixorize
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Physeo
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OME
Additional Resources
Trochlear nerve palsy
Trochlear nerve palsy causes impairment of ipsilateral eye abduction. The eye may appear slightly elevated on examination as the inferior muscles predominate, which also causes a mild diplopia. The patient may appear to have a contralateral head tilt as they attempt to compensate for this diplopia.
Trochlear nerve palsy
Center: The internal rotation of the eye is missing with a Trochlear nerve palsy. Through the preponderance of the antagonist (inferior oblique muscle), the concerned eye is rotated to the outside and drifts upwards slightly (hypertropia).
Right (increased hypertropia): The highest squint deviation occurs when the head is tilted to the side of the paretic muscle, as the eyeball drifts upwards and inwards (Trochlear nerve palsy).
Left (compensating posture of head): Compensatorily, the patients often tilt their head to the opposite side.
One by one
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