All of them are true about the 4th nerve EXCEPT
The trochlear nerve has several features that make it unique from the other cranial nerves: Thinnest cranial nerve. Is the only nerve to exit from the dorsal surface of the brain. Is the only nerve in which all the lower motor neuron fibers decussate. Has the longest intracranial course. Has the smallest number of axons.
The only nerve to emerge from the dorsal aspect of brain
The only nerve to cross over to opposite side
It is the thickest cranial nerve
It has the fewest axons of any cranial nerve
Neuro Ophthalmology