The cerebrum is divided into two major parts: the right and left cerebral hemispheres or halves at a fissure, the deep groove down the middle. The hemispheres communicate with each other through the corpus callosum which is a bundle of fibers between the hemispheres. Each hemisphere controls muscles and glands on the opposite side of the body (i.e. the right side of the brain or hemisphere controls the left side of the body.)
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Enlarge by passing over or clickingimage info This image is Copyright © My-MS.org and falls under Image License E defined under the Image License section of the Disclaimer page.The cerebral cortex is connected to various subcortical structures like the thalamus and the basal ganglia, sending information to them along efferent connections and receiving information from them via afferent connections. Most sensory information is routed to the cerebral cortex via the thalamus. Olfactory information, however, passes through the olfactory bulb to the olfactory cortex or piriform cortex. The vast majority of connections are from one area of the cortex to another rather than to subcortical areas. Cortical regions known as associative cortex are responsible for integrating multiple inputs, processing the information, and carrying out complex responses. The cortex is commonly described as comprising three parts: Sensory Areas, Motor Areas, and Association Areas. Sensory Areas are the areas that receive and process information from the senses. The parts of the cortex that receive sensory inputs from the thalamus are called primary sensory areas. The senses of vision, audition, and touch are served respectively by the primary visual cortex, primary auditory cortex and primary somatosensory cortex. In general, the two hemispheres receive information from the opposite (contralateral) side of the body. Motor Areas are located in both hemispheres of the cortex. They are shaped like a pair of headphones stretching from ear to ear. The motor areas are very closely related to the control of voluntary movements, especially fine fragmented movements performed by the hand. The right half of the motor area controls the left side of the body, and vice versa. Two areas of the cortex are commonly referred to as primary motor cortex, which executes voluntary movements, and supplementary motor areas and premotor cortex, which select voluntary movements. Association Areas function to produce a meaningful perceptual experience of the world, enable us to interact effectively, and support abstract thinking and language. The parietal, temporal, and occipital lobes - all located in the posterior part of the cortex - organize sensory information into a coherent perceptual model of our environment centered on our body image. The frontal lobe or prefrontal association complex is involved in planning actions and movement, as well as abstract thought. Our language abilities are localized to the association areas of the parietal-temporal-occipital complex, typically in the left hemisphere. Wernicke's area relates to understanding language while Broca's area relates to its use. A longitudinal fissure or division separates the brain into two distinct cerebral hemispheres, connected by the corpus callosum. The sides resemble each other and each hemisphere's structure is generally mirrored by the other side. Yet despite the strong similarities, the functions of each cortical hemisphere are
different. image info These 2 images are Copyright © My-MS.org and fall under Image License A defined under the Image License section of the Disclaimer page.Which individual provided early evidence for the left hemisphere's role in speech production?Initial evidence for dominant language processing within the left hemisphere was provided by Broca (1861) and Wernicke (1874), followed by experimental and clinical research that confirmed that language production and comprehension generally rely more heavily on the left than right hemisphere (Springer et al., 1999; ...
Which individual provided early evidence for the left hemisphere's role in speech production quizlet?The separate discoveries of Broca (1865) and Wernicke (1874) provided the first compelling evidence that language and speech functions are performed primarily by the left cerebral hemisphere. This notion is known as: lateralization of function.
What evidence is there that the left hemisphere of the brain is the primary language processing area?The reason: language that is perceived via the right ear is processed in the left hemisphere. When brainwaves are measured using EEG, it emerges that the left hemisphere processes auditory speech information more rapidly.
What is the interpreter function of the left hemisphere quizlet?- From observations like these, came the concept of the interpreter: the tendency of the left hemisphere to invent and defend explanations for actions, even when the true causes are unconscious. > This feature is not limited to split-brain people.
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