Definition

1. Noun:
   • A specific neural pathway: The "trigonum cerebrale" is a defined anatomical structure consisting of an arched bundle of white nerve fibers located at the base of the brain.
   • A commissural and projection pathway: It serves as a conduit by which the hippocampus in one cerebral hemisphere communicates with the hippocampus in the opposite hemisphere, and also projects to subcortical structures like the thalamus and mamillary bodies.

Usage Examples

• Noun:
  • The neurosurgeon carefully avoided the trigonum cerebrale during the procedure.
  • Damage to the trigonum cerebrale can disrupt memory circuits.
  • The fibers of the trigonum cerebrale form a distinct arch visible in sagittal sections.

Advanced Usage

• In anatomical description: The term is used in highly technical medical and neuroscientific contexts to describe this specific fiber tract.
  • The study focused on the role of the trigonum cerebrale in spatial memory consolidation.

Variants and Related Words

• Fornix: This is the more common clinical and anatomical term for the "trigonum cerebrale." The fornix is the same arched bundle of fibers.
• Hippocampal commissure: Refers specifically to the part of the fornix/trigonum cerebrale that connects the two hippocampi.

Synonyms

• Fornix (n): The primary synonym in neuroanatomy.
• Cerebral trigone (n): A less common alternative name.

Related Phrases / Terms

• Body of the fornix: A major subdivision of the fornix/trigonum cerebrale.
• Crus of the fornix: Another part of the same structure.
• Hippocampal formation: The larger complex of structures including the hippocampus, which connects via the trigonum cerebrale/fornix.

Noun

1. an arched bundle of white fibers at the base of the brain by which the hippocampus of each hemisphere projects to the contralateral hippocampus and to the thalamus and mamillary bodies