Cerebrum Anatomy PDF
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This document provides a detailed description of the cerebrum, including its surfaces, poles, borders, and various sulci. It also identifies four major lobes within the cerebrum. The document contains several quizzes to test understanding of the key concepts.
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Anatomy of cerebrum 3 Description of cerebrum :Surfaces-1 Poles -2 -3 Borders Borders-3 Three borders: Superomedial border Inferolateral border Presents the pre-occipital notch which is about 5 cm in front of the occipital pole. Medial border: divided into: a) Medial orbit...
Anatomy of cerebrum 3 Description of cerebrum :Surfaces-1 Poles -2 -3 Borders Borders-3 Three borders: Superomedial border Inferolateral border Presents the pre-occipital notch which is about 5 cm in front of the occipital pole. Medial border: divided into: a) Medial orbital border. b) Medial occipital border. Cerebral hemisphere 3 poles 3 surfaces 3 borders Medial superolateral Frontal Superomedial (Inner) (Outer) Inferior Temporal Inferomedial (Base) Occipital Inferolateral THREE main -4 Sulci Lateral sulcus Lateral sulcus: This sulcus consists of a stem and 3 rami. 1. Anterior ramus. 2. Ascending ramus. 3. Posterior ramus. Central sulcus Central sulcus: 1-Midway between the frontal and occipital poles. 2- Begins on the medial surface and descends downwards and forwards on the superolateral surface 3- Ends above the posterior ramus of lateral sulcus. Four main -5 lobes Insula Part of cerebral cortex which is invaginated into the lateral sulcus Contents Middle cerebral artery -1 2- Deep middle cerebral vein Main sulci of superolateral surface of cerebrum Main Gyri of superolateral surface of cerebrum Superolateral Surface :Frontal lobe It has 4 gyri: 1. Precentral gyrus: between the central and precentral sulci. – It has 3 sulci: 2. Superior frontal gyrus: above 1. Precentral: parallel to the central the superior frontal sulcus. sulcus. 2. Superior frontal: anteroposterior 3. Middle frontal gyrus: between in direction. the superior and inferior frontal sulci. 3. Inferior frontal: parallel to and below the superior one. 4. Inferior frontal gyrus: below the inferior frontal sulcus and contains the anterior and ascending rami of the lateral sulcus. :Parietal lobe It has 3 gyri: – It has 2 sulci: 1. Postcentral gyrus: between the central and 1. Postcentral sulcus: parallel to the central sulcus. postcentral sulci. 2. Interparietal sulcus: 2. Superior parietal lobule anteroposterior in direction. (gyrus): above the interparietal sulcus. 3. Inferior parietal lobule (gyrus): below the interparietal sulcus. :Temporal lobe It has 3 gyri: 1. Superior temporal gyrus: – It has 2 sulci: between the lateral and 1. Superior temporal sulcus: superior temporal sulci. anteroposterior in direction. 2. Inferior temporal sulcus: 2. Middle temporal gyrus: anteroposterior in direction between the superior and and lies parallel and below inferior temporal sulci. the superior one. 3. Inferior temporal gyrus: below the inferior temporal sulcus. :Occipital lobe It has 3 sulci: 1. Posterior part of calcarine sulcus: at the occipital pole. 2. Lunate sulcus: in front of the occipital pole. 3. Lateral occipital: anteroposterior in direction. Quiz Identify the pointed part Identify the pointed part Identify the pointed part Enumerate contents Test your self Which area is hidden in the lateral ?sulcus A. Cuneus B. Paracentral lobule C. Insula D. Wernicke̛s area
