brain part

Details about nIV, strain C57BL/6.
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Hierarchy level in atlas Hof, version Hof et al.-2000 is 5: 4 superstructures include it.

No other subparts of nIV.
  
Tree of trochlear nerve

MESENCEPHALON
Cranial nerves of mesencephalon
Oculomotor nuclei
Trochlear nucleus