| Frontal gyri | |
|---|---|
 | |
| Details | |
| Part of | Frontal lobe |
| Parts | Inferior,Medial,Middle andSuperior |
| Identifiers | |
| Latin | gyri frontalis |
| Anatomical terms of neuroanatomy | |
Thefrontal gyri are sixgyri of thefrontal lobe in thebrain. There are five horizontally oriented, parallel convolutions, of the frontal lobe that are aligned anterior to posterior. Three are visible on the lateral surface of the brain and two are on the inferior surface of the frontal lobe in a region calledorbitofrontal cortex. The other main gyrus of the frontal lobe is theprecentral gyrus which is vertically oriented, and runs parallel with theprecentral sulcus.
The uppermost of the five gyri is thesuperior frontal gyrus,[1] below this is themiddle frontal gyrus, and below this is theinferior frontal gyrus. Continuing from the superior frontal gyrus on the lateral surface, into the uppermost part of the medial surface of the hemisphere is themedial frontal gyrus. The inferior frontal gyrus includesBroca's area. On the inferior or ventral surface of thefrontal lobe including theorbitofrontal cortex is theorbital gyrus. This is also called theorbital gyri because it is separated into four sections or gyri: anterior, posterior, lateral, and medial. The most medial gyrus of the frontal lobes on the inferior surface of the lobe is thestraight gyrus, also called the gyrus rectus. The lowest part of the inferior frontal gyrus rests on theorbital part of the frontal bone.
Thesuperior frontal gyrus makes up about a third of thefrontal lobe. It is bounded laterally by thesuperior frontal sulcus.
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It has been recently found that this region participates during linguistic tasks. More precisely, during interactive communication it is active during a phase of response planning.[2]
Theinferior frontal gyrus includesBroca's area.[3]
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