Weekly review 1 - Sections of Cortex There are 5 major...

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Sections of Cortex There are 5 major lobes in the cortex: Frontal Lobe, Parietal Lobe, Occipital Lobe, Temporal Lobe and insula. Location: In order to identify these lobes, we need to find out central sulcus first. The Frontal Lobe is the area anterior the central sulcus, while Parietal Lobe is posterior it. The occipital lobe is divided from the parietal lobe by the Parieto-occipital fissure. http://en.wikipedia.org/wiki/Image:Gray726.png http://en.wikipedia.org/wiki/Image:Gray727.svg
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Temporal Lobe is below the sylvian sulcus. Insula is the cerebral cortex in depth of lateral fissure. Functions: Frontal Lobe: involved in motor control, speech, and cognition Motor Control: BA4= Precentral gyrus =Primary motor = MI BA 6=premotor area medial BA6= Supplemental motor= MII BA8=Frontal eye field Cognition: BA 9,10,11, 12, 46 = Prefrontal Cortex (PFC) Speech: BA 44, 45 = Broca’s area Parietal Lobe: involved in multimodal processing and spatial awareness The parietal lobe plays important roles in integrating sensory information from various parts of the body, knowledge of numbers and their relations, and in the manipulation of objects. Somatosensory: BA 3,1,2= Postcentral gyrus = primary somasthetic cortex BA 5,7 =Superior parietal lobule=supplementary somatathetic area (SSA)=somatosensory association area Intra(inter)parietal sulcus Taste: BA 43 (inferior postcentral gyrus)= primary gustatory cortex Cognition: BA 39, 40 = Inferior parietal lobule = supramarginalgyrus & angular gyrus=major association cortex in dominant hemisphere. Occipital Lobe: control vision and color recognition Vision: BA 17 primary visual cortex BA 18,19 Higher level visual cortex
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Temporal Lobe: involved in auditory processing and is home to the primary auditory cortex .. Also it’s involved in semantics both in speech and vision. It contains the hippocampus and is therefore involved in memory formation as well Hearing: (Heschl’s Gyrus) BA 41 42 anterior BA 22 Vision: BA 20, 21,37 Speech: posterior BA 22 Memory: temporal pole BA 38 Insula: involved in gustatory, visceral sensory, and emotional processing Brodmann’s Area: A Brodmann area is a region in the brain cortex defined in many different species based on variations in cell size, density, and thickness of the cortical layers. Brodmann areas were originally defined by
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This note was uploaded on 04/01/2008 for the course BIOL 3800 taught by Professor Wenzel during the Spring '08 term at University of Georgia Athens.

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Weekly review 1 - Sections of Cortex There are 5 major...

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