BIO 12 Lecture Notes - Lecture 3: Medial Longitudinal Fissure, Parietal Lobe, Temporal Lobe
14 Sep 2020
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Document Summary
Covers the whole upper part of the skull. Divided into 2 sections called cerebral hemispheres - by a deep groove knownas longitudinal fissure. The cerebral cortex is the outermost layer of the cerebrum. It is composed of gray matter formed into raised convolutions/ridges called gyri; the deeper furrows or grooves are the fissures; the shallow grooves between the gyri are called sulci. It is composed of gray matter formed in raised convolutions or elevated ridges winding around the brain. Central sulcus - divides the frontal lobe from the. This arrangement maximize the surface area of the cerebral cortex (about. 70% is hidden within the depths of sulci) Deep grooves, generally dividing large regions/lobes of the brain. Longitudinal fissure - divided the two cerebral hemispheres (left and right) Transverse fissure - separates the cerebrum from the cerebellum. Sylvian/lateral fissure - divides the temporal lobe from the frontal and parietal lobes.
