parieto-occipital fissure
Học thuậtThân thiện
Definition
- Noun:
- A major groove in the brain: The parieto-occipital fissure is a deep, prominent sulcus (groove) located on the medial (inner) surface of each cerebral hemisphere of the brain.
- An anatomical landmark: Its primary function is to serve as a clear boundary that separates two major regions of the cerebrum: the parietal lobe (involved in sensory processing and spatial awareness) from the occipital lobe (primarily responsible for visual processing).
Usage Examples
- Noun:
- The neurosurgeon carefully identified the parieto-occipital fissure to plan the surgical approach.
- In the MRI scan, the parieto-occipital fissure is clearly visible as a deep groove between the lobes.
- Damage to the cortex near the parieto-occipital fissure can result in complex visual-spatial deficits.
Advanced Usage
- "Parieto-occipital sulcus": This is a synonymous term. "Fissure" and "sulcus" are often used interchangeably in neuroanatomy for major grooves, though "fissure" typically denotes the deepest ones.
- In anatomical descriptions, it is often referenced in relation to other landmarks:
Variants and Related Words
- Parieto-occipital sulcus (n): A direct synonym for the parieto-occipital fissure.
- Parietal lobe (n): The brain lobe anterior to (in front of) the fissure.
- Occipital lobe (n): The brain lobe posterior to (behind) the fissure.
- Calcarine fissure/sulcus (n): A major fissure in the occipital lobe involved in vision, which often meets the parieto-occipital fissure.
Synonyms
- Parieto-occipital sulcus
Notes on Meaning
- This term is highly specific to the field of neuroanatomy. It is not used in everyday language.
- It refers to a specific, named anatomical structure, not a general type of fissure.
Noun
- a sulcus near the posterior end of each hemisphere that separates the parietal lobes and the occipital lobes in both hemispheres