Is there a cortico-nigral tract? A comment based on experimental electron microscopic observations in the cat.
D000818:Animals; D002415:Cats / Q000033:anatomy & histology*; D002540:Cerebral Cortex / Q000166:cytology*; D008854:Microscopy, Electron; D009186:Myelin Sheath / Q000166:cytology; D009410:Nerve Degeneration; D009434:Neural Pathways; D013378:Substantia Nigra / Q000166:cytology*