Department of Pathology, University of Oklahoma Health Sciences Center

NeuroTest Sample Question #36 Next question Previous question

Answer: D (Arhinencephalon) Level of difficulty: 3 NeuroTest NeuroLearn NeuroHelp

Discussion: 

• Arhinencephalon: The olfactory bulbs on both sides are missing in this case. 
• The two hemispheres are clearly separated and therefore this specimen could not be a case of alobar holoprosencephaly.
• The cerebral hemispheres are well formed and so this is not a case of aprosencephaly which refers to a condition that both telencephalon and diencephalon fail to develop.
• The cerebellum and pons are of normal size and configuration and do not suggest olivopontine cerebellar degeneration.

Comment: KarMing-Fung@ouhsc.edu