The document describes the anatomy of the frontal lobe, detailing its structure and division by various sulci and gyri. Key components mentioned include the precentral and central sulci, as well as specific gyri such as the precentral, superior, middle, and inferior frontal gyri. Additionally, it notes the importance of the paracentral lobule and features such as the olfactory sulcus.

2. ANATOMY
▪ Frontal lobe extends from the frontal pole to central sulcus above the sylvain
fissure
▪ Central sulcus separates the frontal lobe from parietal lobe.
▪ Precentral sulcus divides the frontal lobe from motor strips

4. SULCI AND GYRI
▪ On lateral aspects of frontal lobe 3 sulci are visible :precentral sulci,superior
frontal sulci and inferior frontal frontal sulci
▪ In between these sulci 4 gyri present :
▪ A)Precentral gyrus :b/w central and precentral sulcus
▪ B)Superior frontal gyrus :superior to superior frontal sulcus
▪ C)Middle frontal gyrus :b/w superior and inferior frontal sulcus
▪ D)Inferior frontal gyrus: inferior to inferior frontal sulcus

6. ▪ On medial surface the frontal lobe extends down to the cingulate sulcus
▪ The paracentral lobule consists of the extensions of the precentral and post central gyri
onto the medial hemispheric surface above cingulate sulcus it is imp. For bladder
control
▪ The inferior frontal gyrus divided into pars orbitalis pars triangularis and pars
operculularis
▪ On the medial surface lies olfactory sulcus and olfactory bulb and tract overlies this
sulcus