The Brain: The Mind Of The Brain The brain is an amazing thing but it’s also such a weird thing. We just have this 3 pound ball of nervous tissue inside of our skull that helps us walk, talk, move, solve problems, write, read, imagine impossible situations that will stress you out at 4 AM (take this part out possibly), feel emotions, stores memories, and so many other incredible things Sep 04, · The brain is the most complex organ in the human body. It produces our every thought, action, memory, feeling and experience of the world. This jelly The Human Brain Essay Words | 5 Pages. The human brain is a big, intricate—yet delicate, structure in the human body. It is the key structure in cognitive function. Any damage to the brain does not only “erase” memories but also may “deceive” the brain to erroneously remember a new object as being familiar ()
Introduction: The Human Brain | New Scientist
By Helen Phillips. A false-colour Magnetic Resonance Image MRI of a mid-sagittal section through the head of a normal 42 year-old woman, showing structures of the brain, spine and facial tissues. The brain is the most complex organ in the human body. It produces our every thought, actionmemoryfeeling and experience of the world.
This jelly-like mass of tissue, weighing in at around 1. The complexity of the connectivity between these cells is mind-boggling. Each neuron can make contact with thousands or even tens of thousands of others, brain essay, via tiny structures called synapses. Our brains form a million new connections for every second of our lives, brain essay.
The pattern and strength of the connections is constantly changing and no two brains are alike. It is in these changing connections that memories are stored, habits learned and personalities shapedby reinforcing certain patterns of brain activity, and losing others.
The grey matter is the cell bodies of the neurons, brain essay, while the white matter is the branching network of thread-like tendrils — called dendrites and axons — that spread out from the cell bodies to connect to other neurons, brain essay. But the brain also has another, even more numerous type of cell, called glial cells. These outnumber neurons ten times over, brain essay. Once thought to be support cells, they are now known brain essay amplify neural signals and to be as important as neurons in mental calculations.
There are many different types of neuron, only one of which is unique to humans and the other great apes, the so called spindle cells. Brain structure is shaped partly by genesbrain essay, but largely by experience. Only relatively recently it was discovered that new brain cells are being born throughout our lives — a process called neurogenesis. The brain has bursts of growth and then periods of consolidationwhen excess connections are pruned, brain essay.
The most notable bursts are in the first two or three years of life, during pubertybrain essay, and also a final burst in young adulthood. How a brain ages also depends on genes and lifestyle too. Exercising the brain and giving it the right diet can be just as important as it is for the rest of the body.
The neurons in our brains communicate in a variety of ways. Signals pass between them by the release and capture of neurotransmitter and neuromodulator chemicals, such as glutamatedopamineacetylcholinenoradrenalinbrain essay, serotonin and endorphins. Some neurochemicals work in the synapsepassing specific messages from release sites to collection sites, called receptors.
Others also spread their influence more widely, like a radio signalmaking whole brain regions more or less sensitive. These neurochemicals are so important that deficiencies in them are linked to brain essay diseases.
It can also increase brain essay to addiction because it mediates our sensations of reward and pleasure. Within individual neurons, signals are formed by electrochemical pulses.
Collectively, this electrical activity can be detected outside the scalp by an electroencephalogram EEG. These signals have wave-like patternswhich scientists classify from alpha common while we are relaxing or sleeping brain essay, through to gamma active thought.
When this activity goes awry, it is called a seizure. Some researchers think that synchronising the activity in different brain regions is important in perception. Other ways of imaging brain activity are indirect. Functional magnetic resonance imaging fMRI or positron emission tomography PET monitor blood flow. MRI scans, computed tomography CT scans and diffusion tensor images DTI use the magnetic signatures of different tissues, X-ray absorption, or the movement of water molecules in those tissues, to image the brain.
These scanning techniques have revealed which parts of the brain are associated with which functions. Examples include activity related to sensationsmovement, libidochoicesbrain essay, regretsmotivations and even racism. However, brain essay, some experts argue that we put too much trust brain essay these results and that brain essay raise privacy issues. Before scanning techniques were common, researchers relied on patients with brain damage caused by strokeshead injuries or illnesses, to determine which brain areas are required for brain essay functions.
One famous example was the case of Phineas Gagea 19 th century railroad worker who brain essay part of the front of his brain when a 1-metre-long iron pole was blasted through his head during an explosion. He recovered physically, but was left with permanent changes to his personalityshowing for the first time that specific brain regions are linked to different processes. The most obvious anatomical feature of our brains is the undulating surfac of the cerebrum — the deep clefts are known as sulci and its folds are gyri.
The cerebrum is the largest part of our brain and is largely made up of the two cerebral hemispheres. It is the most evolutionarily recent brain structure, dealing with more complex cognitive brain activities. It is often said that the right hemisphere is more creative and emotional and the left deals with logic, but the reality is more complex. Nonetheless, the sides do have some specialisationswith the left dealing with speech and languagethe right with spatial and body awareness.
See our Interactive Graphic for more on brain structure. Further anatomical divisions of the cerebral hemispheres are the occipital lobe at the back, devoted to visionand the parietal lobe above that, dealing with movementbrain essay, position, orientation and calculation.
Behind the ears and temples lie the temporal lobes brain essay, dealing with sound and speech comprehension and some aspects of memory. They also brain essay with complex social emotions such as regretmorality and empathy.
Another way to classify the regions is as sensory cortex brain essay motor cortexcontrolling incoming information, and outgoing behaviour respectively. Below the cerebral hemispheres, but still referred to as part of the forebrain, is the cingulate cortexwhich deals with directing behaviour and pain.
And beneath this lies the corpus callosumwhich connects the two sides of the brain. Other important areas of the forebrain are the basal gangliaresponsible for movementmotivation and reward.
Beneath the forebrain lie more primitive brain regions. The limbic systemcommon to all mammals, deals with urges and appetites. Emotions are most closely brain essay with structures called the amygdalacaudate nucleus and putamen. Also in the limbic brain are the hippocampus — vital for forming new memories; the thalamus — a kind of sensory relay station; and the hypothalamuswhich regulates bodily functions via hormone release from the pituitary gland. The back of the brain has a brain essay convoluted and folded swelling called the cerebellumwhich stores patterns of movement, brain essay, habits and repeated tasks — things we can do without thinking about them.
The most primitive parts, the midbrain and brain stemcontrol the bodily functions we brain essay no conscious control of, such as breathingheart rate, blood pressure, sleep patternsand so on. They also control signals that pass between the brain and the rest of the body, through the spinal cord. Though we have discovered an enormous amount about the brain, huge and crucial mysteries remain.
One of the most important is how does the brain produces our conscious experiences? But our conscious thoughts, sensations and perceptions — what define us as humans — cannot yet be explained in terms of brain activity.
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The human brain is a magnificent system in the human body. It is the most complex, complicated, yet outstanding brilliant organ in the human body. Eric Kandel once said, “The brain is complex biological organ of great computational capability that constructs our sensory experiences, regulates Mar 24, · Essay On Brain And The Brain as, thinking, emotions, memories and so forth are controlled by the brain. It serves as a central nervous system in the human body. The mind is the intellect/consciousness that originates in the human brain and manifests itself in emotions, thoughts, perceptions and so forth The Brain: The Mind Of The Brain The brain is an amazing thing but it’s also such a weird thing. We just have this 3 pound ball of nervous tissue inside of our skull that helps us walk, talk, move, solve problems, write, read, imagine impossible situations that will stress you out at 4 AM (take this part out possibly), feel emotions, stores memories, and so many other incredible things
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