SYNAPSE 101 1 of 4 Gross cortical anatomy of the cerebral hemisphere (lateral aspect ) FRONTAL LOBE скачать в хорошем качестве

SYNAPSE 101 1 of 4 Gross cortical anatomy of the cerebral hemisphere (lateral aspect ) FRONTAL LOBE

Welcome to SYNAPSE 101, your weekly dose of neurological teaching…. Today we will discuss the Lateral aspect of the gross cortical anatomy of the cerebral hemisphere Let us define some terms : a groove is called sulcus and a deeper groove is called fissure, a convolution is called gyrus The left and right side of cerebral hemisphere is separated by the longitudinal fissure The brain is divided into different lobes and there are important landmarks to note: One is the central sulcus of Rolando which divides frontal and parietal lobes. Anything in front is frontal lobe and behind it, is parietal lobe anterior to the central sulcus is the precentral gyrus designated as Brodmann area 4 which is the primary motor cortex after which is the precentral sulcus Anterior to the precentral gyrus, there are 3 frontal gyri to note The superior frontal gyrus The medial frontal gyrus And the inferior frontal gyrus Clinically, the superior frontal gyrus has important regions : (1) our frontal eye field designated as Brodmann area 8 is responsible for horizontal gaze (2) dorsolateral prefrontal cortex or Brodmann’s area 9 and 46 used for motor planning (3) and lastly, the anterior prefrontal cortex used for higher calculation The superior frontal gyrus is separated from medial frontal gyrus by the superior frontal sulcus The middle frontal gyrus is separated from inferior frontal gyrus by the inferior frontal sulcus On the left hemisphere, which is usually our dominant hemisphere, the Broca’s area is in the inferior frontal gyrus Take note of pars orbitalis. Horizontal ramus separates it from pars triangularis, and Ascending ramus separates pars triangularis from pars opercularis. The Broca area is made up of two areas: the pars opercularis (Brodmann area 44) and the pars triangularis (Brodmann area 45)... ENJOY STUDYING !