![]() El objetivo del trabajo fue verificar si los lóbulos temporales son anatómicamente diferentes. En el lado izquierdo del cerebro se localiza la facultad del lenguaje, como también de la lateralidad manual. Entre todos los animales, el Hombre es el que presenta el cerebro más asimétrico (Crow, 2004). RESUMEN: Las asimetrías anatómicas del cerebro humano son sutiles y aún poco estudiadas. KEY WORDS: Brain Asymmetry Temporal Lobe. The measurements taken showed differences between the right and left temporal lobes. Results were submitted to a statistical analysis (ANOVA) and demonstrated that Ml was larger in the left hemisphere, by contrast with the data obtained for M2 and M3, which were larger in the right hemisphere. Three different measurements were taken using a pachimeter (Mitutoyo) and a goniometer (Card) on both hemispheres: Ml - the length of the lateral sulcus M2 - the distance from the lateral sulcus to the inferior margin of the inferior temporal gyrus, and M3 - the angle formed between the lines of the collateral sulcus and the inferior margin of the inferior temporal gyrus. The brains were fixed in a solution of 5% paraformaldehyde. Our sample was composed of 40 post mortem adult brains of both sexes, which were investigated at the Human Anatomy Laboratory of the Nove de Julho University Center in Sao Paulo, Brazil. The objective this paper is to verify whether the temporal lobes are anatomically different. The language faculty and handedness are localized on the left side. Among all the animals, humans have the most asymmetric brains Crow (2004). SUMMARY: Anatomical brain asymmetries are subtle and still little studied in humans. *** Physiotherapist - Laboratory of Human Anatomy, UNINOVE, Brasil. ** Professor the Health Department, UNINOVE, Brasil. in the Health Department, Human Morphology Division, UNINOVE, Brasil. The area is named after Pierre Paul Broca who noticed an impaired ability to produce speech in two patients who had sustained injury to the region.Asymmetries of the Left and Right Temporal LobesĪsimetría de los Lóbulos Temporales Izquierdo y Derecho This area was named after Carl Wernicke, a German neurologist who discovered that the area is related to how words and syllables are pronounced.īroca's area is an area in the frontal lobe of the brain that is related to the production of speech. Wernicke's area is an area in the cerebral cortex related to speech and is involved in both spoken and written language. The auditory cortex in the cerebral cortex processes auditory information and as part of the sensory system for hearing, performs both basic and higher hearing functions. The visual cortex is the part of the cerebral cortex that is responsible for processing visual information. The human genome codes for the speech ability that will evolve as the brain is trained. Language and speech skills are therefore acquired after birth. Neural networks are established over time as an individual learns and experiences things. When such a site is indentified, it is spared, since damaging these areas could cause a temporary or permanent loss of speech. ![]() On performing brain surgery to treat epilepsy or remove tumors for example, electrical stimulation of speech-related areas in the cortex prevents the patient from being able to name things that are shown to them and may also prevent their ability to produce grammatically coherent sentences. Determination of language areasĪ procedure called cortical stimulation mapping is a technique that is used to analyze regions of the brain that are related to speech. However, in about 19% of left-handed people, the areas responsible for language are in the right hemisphere and as many as 68% of them have some language abilities in both the left and the right hemispheres. Recent studies have shown that in around 97% of people, language is represented in the left hemisphere. ![]() Physicians noted that brain-injured patients with damage to the left hemisphere would lose power of speech and language abilities, while those with injuries to the right hemisphere did not lose this ability. The earliest research on speech and language centers of the brain dates back to the early nineteenth century. The left hemisphere controls the right side of the body while the right hemisphere controls the left side. The left hemisphere is the "logical brain" and is involved in language and analysis and the right hemisphere is the "creative brain," involved in daydreaming and imagination. The human brain is divided into two hemispheres. Ananya Mandal, MD Reviewed by Sally Robertson, B.Sc.
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