Which function is correctly matched with one of the three main divisions of the brain?
Introduction[edit | edit source]The cerebral cortex is a sheet of neural tissue that is outermost to the cerebrum of the mammalian brain. It has up to six layers of nerve cells. It is covered by the meninges and often referred to as grey matter[1]. The cortex is grey because nerves in this area lack the insulation (myelin) that makes most other parts of the brain appear to be white[2]. Image: Layers and cells of the cerebral cortex [3] Show
The cerebral cortex
The main difference between cerebrum and cerebral cortex
Structure[edit | edit source]The outer layer of the cerebral hemisphere is termed the cerebral cortex. This is inter-connected via pathways that run sub-cortically. It is these connections as well as the connections from the cerebral cortex to the brainstem, spinal cord and nuclei deep within the cerebral hemisphere that form the white matter of the cerebral hemisphere. The deep nuclei include structures such as the basal ganglia and the thalamus. The main difference between cerebrum and cerebral cortex is that cerebrum is the largest part of the brain whereas cerebral cortex is the outer layer of the cerebrum. The cerebrum comprises two cerebral hemispheres. The cerebral cortex is made up of gray matter that covers the internal white matter.[5] The cerebrum consists of two cerebral hemispheres, the right and left hemisphere are connected by the corpus callosum which facilitates communication between both sides of the brain, with each hemisphere in the main connection to the contralateral side of the body. The hemispheres are divided into four lobes;
Neocortex[edit | edit source]The phylogenetically most recent part of the cerebral cortex, the neocortex, has six horizontal layers (the more ancient part of the cerebral cortex, the hippocampus, has at most three cellular layers). Neurons in various layers connect vertically to form small microcircuits, called 'columns'.
Image: Cerebral cortex. To the left, the groups of cells; to the right, the systems of fibers. Quite to the left of the figure a sensory nerve fiber is shown. Cell body layers are labeled on the left, and fiber layers are labeled on the right. Allocortex[edit | edit source]The allocortex (also known as heterogenetic cortex) is a part of the cerebral cortex characterized by fewer cell layers than the neocortex (i.e. fewer than six). More ancient phylogenetically than the mammals, evolved to handle olfaction and the memory of smells. The specific regions of the brain normally described as part of the allocortex are:
2. Paleocortex (3 three to five layers) The cellular organization of the old cortex is different from the six-layer structure mentioned above. Unable to form so many complex micro circuits. Function[edit | edit source]The cerebral cortex is involved in several functions of the body including:
The cerebral cortex contains:
2. Motor areas: including the primary motor cortex and the premotor cortex, regulate voluntary movement[2]. Why Wrinkles are Good![edit | edit source]Over time, the human cortex undergoes a process of corticalization, or wrinkling of the cortex. This process is due to the vast knowledge that the human brain accumulates over time. Therefore, the more wrinkly your brain, the smarter and more intelligent you are![8] References[edit | edit source]
What are the 3 major parts of the brain and their functions?The brain has three main parts:. The cerebrum fills up most of your skull. It is involved in remembering, problem solving, thinking, and feeling. ... . The cerebellum sits at the back of your head, under the cerebrum. It controls coordination and balance.. The brain stem sits beneath your cerebrum in front of your cerebellum.. Which major brain area is not correctly matched?Final answer: The brain part which is not correctly matching with its function is Pons : Consciousness. Q. Which one of the following pairs of brain part and its function is not correctly matched ?
What are the major divisions of the brain?Main Parts of the Brain and Their Functions. At a high level, the brain can be divided into the cerebrum, brainstem and cerebellum.
What are the three divisions of the brain in the fetal nervous system?The brain and the spinal cord arise in early development from the neural tube, which expands in the front of the embryo to form the three primary brain divisions: the prosencephalon (forebrain), mesencephalon (midbrain), and rhombencephalon (hindbrain) (Figure 1.1A).
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