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Exploration of the brain from its basal aspect

Ansa lenticularis

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Image #5-7
Diagram Image
Legend Image
Exploration of the brain from its basal aspect
Ansa lenticularis
This view is a close-up of the previous one but the specimen is now turned at right angles so that the midline is at the bottom. Details of the ansa lenticularis (13) in its course around the medial edge of the cerebral peduncle are revealed. Some fibers of this group are also seen as they pass inward between fascicles of the peduncle and these join others above the peduncle to form the fasciculus lenticularis (H2 field of Forel) in the subthalamic region.
  1. Lateral geniculate body
  2. Optic tract (cut and retracted posteriorly)
  3. Cerebral peduncle
  4. Posterior cerebral artery (cut across)
  5. Pons
  6. Superior cerebellar artery
  7. Oculomotor nerve (III)
  8. Mamillary body
  9. Putamen
  10. Internal capsule
  11. Globus pallidus (external division)
  12. Anterior commissure
  13. Ansa lenticularis
  14. Artery of Heubner
  15. Diagonal band of Broca
  16. Radiating fibers of rostral lamina of corpus callosum
  17. Anterior perforated substance
  18. Anterior cerebral artery (cut across)
  19. Olfactory trigone
  20. Optic nerve (II)