WordGarden.iogyrus
C2Pronunciation
UK
- /dʒˈaɪrəs/
US
- /dʒˈaɪrəs/
Meanings
Noun
a ridge or fold on the surface of the brain, especially the cerebral cortex
Beyond the definition
Imagine wrinkling a piece of paper - that's a bit like what happens in your brain. The surface of your brain isn't smooth; it's covered in ridges and grooves. Those ridges are called gyri (singular: gyrus). These aren't random wrinkles, though. They greatly increase the brain's surface area, making room for more neurons and more processing power. Think of them as nature's way of fitting extra brain tissue into your skull. You might hear about a specific gyrus being linked to language, movement, or memory, because different areas do different jobs.
A gyrus (pronounced JY-rus) is a ridge or fold on the cerebral cortex of the brain, separated from nearby folds by grooves called sulci. Think of your brain as a walnut - it isn't flat, but deeply folded. These folds aren't just for show; they are a key part of how our brains work.
The gyri and sulci greatly increase the surface area of the cerebral cortex, the outer layer of the brain responsible for higher-level functions like language, memory, reasoning, and consciousness. Without these folds, your brain would have to be much larger to hold all those neurons.
Different gyri are named based on their location and function. For example, the precentral gyrus is involved in motor control (movement), while the superior temporal gyrus plays a role in auditory processing (hearing). Neuroscientists often refer to specific gyri when discussing brain activity or damage from injury or disease.
So, next time you think about your brainpower, remember those intricate folds - the gyri - working hard behind the scenes. They're not just wrinkles; they're a key part of what makes us who we are.
Examples
- 1
Medical scan
The scan showed a small lesion in the temporal gyrus.
- 2
Brain damage
Damage to a gyrus in the left hemisphere can affect language.
- 3
Anatomy class
In anatomy class, the students learned to identify the frontal gyri.
See also
Forms and spellings
1 form open this card.
Main spelling
- gyrusnoun