chiasma opticum

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chiasma opticum

A diagram shows the chiasma opticum in the human brain.

Definition
  1. Noun:
    • The crossing of the optic nerves from the two eyes at the base of the brain: The "chiasma opticum" is a specific anatomical structure where the optic nerves partially cross. This crossing allows visual information from each eye to be processed by both hemispheres of the brain.
Usage
  • The term "chiasma opticum" is used exclusively in technical, medical, and biological contexts to describe this precise neural structure. It is a formal, scientific term.
Examples
  • Noun:
    • The surgeon carefully avoided the chiasma opticum during the procedure.
    • Damage to the chiasma opticum can cause specific visual field deficits.
    • The anatomy textbook included a detailed diagram of the chiasma opticum.
Advanced Usage
  • "Lesion at the chiasma opticum": Refers to damage or an abnormality located at this specific neural crossing point.
    • The MRI revealed a lesion at the chiasma opticum.
Variants and Related Words
  • Optic chiasm (n): The most common English synonym for "chiasma opticum". It is used interchangeably in medical literature.
    • The optic chiasm is a crucial structure for binocular vision.
  • Chiasma (n): A more general term for an X-shaped crossing or intersection, especially of nerves or chromosomes. "Chiasma opticum" is a specific type of chiasma.
    • Genetic recombination involves the formation of a chiasma between homologous chromosomes.
Synonyms
  • Optic chiasm: The direct and most frequently used synonym.
  • Optic commissure: A less common but technically accurate synonym referring to the point of crossing.
Related Terms and Concepts
  • Hemianopia (n): A type of visual field loss often associated with damage to the optic chiasm.
    • A tumor pressing on the chiasma opticum can lead to bitemporal hemianopia.
  • Decussation (n): The general anatomical term for a crossing over of nerve fibers from one side of the body to the other. The "chiasma opticum" is a specific decussation.
    • The chiasma opticum is an example of a partial decussation of sensory pathways.
chiasma opticum

A diagram shows the chiasma opticum in the human brain.

Noun
  1. the crossing of the optic nerves from the two eyes at the base of the brain

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