Gyri and sulci are the ________ and ________, respectively, which characterize the surface of the human brain. cortex; forebrain fissures; folds folds; grooves grooves; folds
Gyri and sulci are the folds and grooves, respectively, which characterize the surface of the human brain.
What is gyri?
The gyri are part of a network of folds and ridges that help the human brain and other mammalian brains have a larger surface area. The brain's size is limited because it is confined to the skull.
Ridges and depressions form folds, allowing for a larger cortical surface area and higher cognitive function within the confines of a smaller cranium.
What is sulci?
The folded surface of the cerebral cortex is made up of sulci, which are grooves, and gyri, which are folds or ridges.
Fissures are larger or deeper sulci, and the two terms are often used interchangeably.
In humans and other mammals, the folded cortex increases the surface area of the brain.
When looking at the human brain, the grooves cover two-thirds of the surface.
A gyrus is surrounded by a sulcus, which is a shallower groove.