gyrus
Definition
- Noun:
- A convex fold or elevation in the surface of the brain: A gyrus is one of the prominent, rounded ridges on the outer layer of the cerebrum, formed by the folding of the cerebral cortex. These folds increase the brain's surface area within the confines of the skull.
Usage Examples
- Noun:
- The precentral gyrus is a critical structure for voluntary motor control.
- Brain imaging showed abnormal activity in the temporal gyrus.
- The folds, or gyri, and grooves, or sulci, create the brain's characteristic wrinkled appearance.
Advanced Usage
- "Gyrus formation": The developmental process by which the brain's cortical surface folds to create gyri.
- Abnormal gyrus formation can be linked to certain neurodevelopmental disorders.
- Specific anatomical names: Individual gyri often have specific names based on their location and function (e.g., angular gyrus, cingulate gyrus, postcentral gyrus).
- The angular gyrus is involved in complex language and number processing.
Variants and Related Words
- Gyri (n): The plural form of .
- The study mapped the functions associated with different cerebral gyri.
- Gyrification (n): The process of forming the characteristic folds of the cerebral cortex.
- The degree of cortical gyrification varies across mammalian species.
Synonyms
- Convolution: A synonym often used in anatomical and formal contexts to describe a fold or twist, especially of the brain's surface.
- The cerebral convolutions are essential for higher cognitive functions.
Related Terms (Not Phrasal Verbs or Idioms)
- Sulcus (n): The groove or furrow between two adjacent gyri.
- The central sulcus separates the precentral gyrus from the postcentral gyrus.
- Cerebral cortex (n): The outer layer of neural tissue of the cerebrum, which is folded into gyri and sulci.
- The cerebral cortex is responsible for many higher-order brain functions.
Noun
-
a convex fold or elevation in the surface of the brain
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