Definition

1. Noun:
   • A specific anatomical groove in the brain: The "calcarine fissure" is a prominent sulcus (a groove or furrow) located on the inner (mesial) surface of the occipital lobe of the cerebrum. It is a key landmark in the brain's visual cortex.

Examples of Usage

• Noun:
  • The primary visual cortex is located along the walls of the calcarine fissure.
  • An MRI scan clearly showed the calcarine fissure in both cerebral hemispheres.

Advanced Usage

• "Calcarine" as a descriptor: The term "calcarine" is derived from Latin , meaning "spur," due to the fissure's shape. It is almost exclusively used in the compound anatomical term "calcarine fissure" or "calcarine sulcus."
  • The calcarine cortex refers to the cortical tissue surrounding the calcarine fissure.

Variants and Related Words

• Calcarine sulcus: A direct synonym for "calcarine fissure." In neuroanatomy, "fissure" and "sulcus" are often used interchangeably for major grooves.
• Occipital lobe: The region of the cerebrum where the calcarine fissure is located.
• Primary visual cortex (V1) / Striate cortex: The functional area of the brain that is housed within the calcarine fissure.

Synonyms

• Calcarine sulcus: The most precise and common synonym.

Related Phrases

(This term is a specific anatomical noun and does not have associated phrasal verbs or idioms.)

Noun

1. a sulcus in the mesial surface of the occipital lobe of the cerebrum