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What Does A Brain Look Like

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What Does The Human Brain Look Like

What does the brain look like?

There are three main parts of the brain: the cerebrum, the cerebellum and the brain stem. Each part is in charge of different things. Parts of the brain work closely together and send messages to each other and to other parts of the body to control everything we do, feel and think.

The brain has a texture like firm jelly. In most cases, a minor hit to the head does not cause any lasting problems. This is because the brain is well protected by shock-absorbing liquid called cerebro spinal fluid, layers of tissue called meninges and the hard part of the head, called the skull.

The brain is also made up of chemicals and nerve cells that send messages to different parts of the brain and body. The brain uses these messages to do important things such as:

  • Control the way our body moves
  • How we think, make decisions, learn and remember
  • How we speak
  • Our personality and behaviour
  • Our vision, hearing, taste, smell, and touch
  • Things we dont think about, such as breathing, heart rate, body temperature and blood pressure

Can Depression Be Seen In The Brain

Yes, it can. However, checking through a brain scan alone should not and cannot be the only way in determining whether a person has depression or not. It also requires a session with a mental health professional so further assessment, evaluation, interviews and tests will be done before making a diagnosis.

Introducing The Human Brain

The human brain is the most complex organ in the body. This three-pound mass of gray and white matter sits at the center of all human activityyou need it to drive a car, to enjoy a meal, to breathe, to create an artistic masterpiece, and to enjoy everyday activities. The brain regulates your body’s basic functions, enables you to interpret and respond to everything you experience, and shapes your behavior. In short, your brain is youeverything you think and feel, and who you are.

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How Is The Brain Supplied With Blood

The brain needs a steady flow of enough oxygen, glucose, and other nutrients. For that reason, it has a particularly good blood supply. Each side of the brain receives blood through three arteries:

  • In the front, the anterior cerebral artery supplies the tissue behind the forehead and under the crown .
  • The middle cerebral artery is important for the sides and areas that are further inside the brain. The anterior and middle cerebral artery split off from the internal carotid artery, a major blood vessel in the neck.
  • The posterior cerebral artery supplies the back of the head, the lower part of the brain, and the cerebellum. It is supplied with blood from the vertebral arteries, which are also major arteries of the neck.

Before the three arteries reach their brain region, where they split into smaller branches, they are close together below the brain. In this area, they are connected to each other by smaller blood vessels forming a structure similar to a traffic circle. The arteries are connected to each other in other areas as well. The advantage of these connections is that blood supply problems in the brain can be compensated for to some extent: For example, if a branch of an artery gradually becomes narrower, blood can still flow to the part of the brain it supplies through these alternative routes .

The Size Of The Human Brain

Older adults can still grow new brain cells, study finds ...
  • In terms of weight, the average adult human brain weighs in at 1300 to 1400 grams or around 3 pounds.
  • In terms of length, the average brain is around 15 centimeters long.
  • For comparison, a newborn human baby’s brain weighs approximately 350 to 400 grams or three-quarters of a pound.
  • Men tend to have bigger brains than women. After taking overall body weight into account, men’s brains tend to be approximately 100 grams larger than women’s.
  • In women, parts of the frontal lobe and limbic cortex tend to be bigger than those of men.
  • In men, the parietal cortex and amygdala tend to be larger than those in women.
  • Neurons are the structures that serve as building blocks of the brain and nervous system. They transmit and carry information, allowing different parts of the brain to communicate with one another as well as allowing the brain to communicate with various parts of the body. Researchers currently estimate that there are around 86 billion neurons in the human brain.

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This Is What The Brain Of A Stroke Survivor Looks Like

Strokes are the fifth highest cause of death in the U.S., killing almost 130,000 Americans every year. More than 795,000 Americans suffer a stroke every year. For over half of those Americans, it’s their first.

87% of all strokes are ischemic, which means that blood flow to the brain is blocked, causing the cells to die and the brain tissue to become irrevocably damaged.

While everyone is at risk from suffering a stroke, drug users that use stimulant drugs such as cocaine and methamphetime are at a higher risk of ischemic strokes. This is because these stimulants can induce hypertension and other vascular toxicity, which can lead to strokes.

The collapsed area of the brain in the image below is an infarct . Though this stroke survivor died of other causes, it’s possible to see that the damage to the brain may have given rise to the classic symptoms of a stroke: immobility, inability to feel, loss of vision, loss of hearing, and speech and cognitive problems.

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Lobes Of The Brain And What They Control

Each brain hemisphere has four sections, called lobes: frontal, parietal, temporal and occipital. Each lobe controls specific functions.

  • Frontal lobe. The largest lobe of the brain, located in the front of the head, the frontal lobe is involved in personality characteristics, decision-making and movement. Recognition of smell usually involves parts of the frontal lobe. The frontal lobe contains Brocas area, which is associated with speech ability.
  • Parietal lobe. The middle part of the brain, the parietal lobe helps a person identify objects and understand spatial relationships . The parietal lobe is also involved in interpreting pain and touch in the body. The parietal lobe houses Wernickes area, which helps the brain understand spoken language.
  • Occipital lobe. The occipital lobe is the back part of the brain that is involved with vision.
  • Temporal lobe. The sides of the brain, temporal lobes are involved in short-term memory, speech, musical rhythm and some degree of smell recognition.

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How Does Alzheimers Disease Affect The Brain

The brain typically shrinks to some degree in healthy aging but, surprisingly, does not lose neurons in large numbers. In Alzheimers disease, however, damage is widespread, as many neurons stop functioning, lose connections with other neurons, and die. Alzheimers disrupts processes vital to neurons and their networks, including communication, metabolism, and repair.

At first, Alzheimers disease typically destroys neurons and their connections in parts of the brain involved in memory, including the entorhinal cortex and hippocampus. It later affects areas in the cerebral cortex responsible for language, reasoning, and social behavior. Eventually, many other areas of the brain are damaged. Over time, a person with Alzheimers gradually loses his or her ability to live and function independently. Ultimately, the disease is fatal.

The National Institute Of Neurological Disorders And Stroke

Inside the Human Brain! What CTE Looks Like (Football and Wrestling)

Since its creation by Congress in 1950, the NINDS has grown to become the leading supporter of neurological research in the United States. Most research funded by the NINDS is conducted by scientists in public and private institutions such as universities, medical schools, and hospitals. Government scientists also conduct a wide array of neurological research in the more than 20 laboratories and branches of the NINDS itself. This research ranges from studies on the structure and function of single brain cells to tests of new diagnostic tools and treatments for those with neurological disorders.

For information on other neurological disorders or research programs funded by the National Institute of Neurological Disorders and Stroke, contact the Institute’s Brain Resources and Information Network at:

Office of Communications and Public LiaisonNational Institute of Neurological Disorders and StrokeNational Institutes of HealthBethesda, MD 20892

NINDS health-related material is provided for information purposes only and does not necessarily represent endorsement by or an official position of the National Institute of Neurological Disorders and Stroke or any other Federal agency. Advice on the treatment or care of an individual patient should be obtained through consultation with a physician who has examined that patient or is familiar with that patient’s medical history.

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Dementia And The Brain

Knowing more about the brain and how it can change can help to understand the symptoms of dementia. It can help a person with dementia to live well, or to support a person with dementia to live well.

  • You are here: Dementia and the brain
  • These pages explain which areas of the brain are responsible for certain skills and abilities, and how these are affected by dementia. We explain how changes to the brain relate to changes a person may notice as the condition progresses.

    This information is helpful for anyone who wants to find out more about how the brain is affected by dementia.

    Why Is The Brain Shaped Like It Is

      The human brain has a very striking shape, and one feature stands out large and clear: the cerebral cortex with its stereotyped pattern of gyri and sulci . This characteristic folded shape of the cortex is a major innovation in evolution that allowed an increase in the size and complexity of the human brain.

      How the brain adopts these complex folds is surprisingly unclear, but probably involves both shape changes and movement of cells. Mechanical constraints within the overall tissue, and imposed by surrounding tissues also contribute to the ultimate shape: the brain has to fit into the skull after all. McGovern postdoc Jonathan Wilde has a long-term interest in studying how the brain develops, and explained to us how the shape of the brain initially arises.

      In the case of humans, our historical reliance upon intelligence has driven a massive expansion of the cerebral cortex.

      So essentially, the brain starts off as a similar shape for creatures with spinal cords. But why is the human brain such a distinct shape?

      In the case of humans, explains Wilde, our historical reliance upon intelligence has driven a massive expansion of the cerebral cortex, which is the primary brain structure responsible for critical thinking and higher cognitive abilities. Accordingly, the human cortex is strikingly large and covered in a labyrinth of folds that serve to increase its surface area and computational power.

      Do you have a question for The Brain? Ask it here.

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      What Happens To The Brain In Alzheimers Disease

      The healthy human brain contains tens of billions of neuronsspecialized cells that process and transmit information via electrical and chemical signals. They send messages between different parts of the brain, and from the brain to the muscles and organs of the body. Alzheimers disease disrupts this communication among neurons, resulting in loss of function and cell death.

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      What Are The Characteristic Findings Of Cns Lymphoma

      What Does the Brain Look Like?

      New CT and MR imaging techniques and metabolic imaging have demonstrated characteristic findings in CNS lymphoma, aiding in its differentiation from other CNS lesions. Advanced imaging techniques may, in the future, substantially improve the diagnostic accuracy of imaging, ultimately facilitating a noninvasive method of diagnosis.

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      How Brain Lesions Form In Ms

      Sometimes, loss of myelin in the brain does nothing to interfere with nerve signals, says Cross. It depends on how much of it is lost in a bundle of nerve fibers, she explains. But when enough myelin is lost from enough nerve fibers in an area, this lesion will be visible on a magnetic resonance imaging scan of the brain and MS symptoms may develop.

      Even without medical treatment, brain lesions in MS dont simply keep growing and growing. The body calms down these lesions and surrounds them, and they stop, says Cross.

      If a lesion forms but doesnt develop past a certain point, it may cause few or even no symptoms. You might see a region thats demyelinated, but the nerve fibers are still there and havent been damaged too much, Cross explains. And that person may have no functional deficits from that lesion.

      But in some lesions, the nerve fibers themselves become heavily damaged and die off as a result. That stops the affected nerve cells from sending signals and can result in a permanent loss of cognitive or physical function.

      • MRI scan of a healthy brain.
      • A brain with multiple MS lesions.

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      The Biggest Part: The Cerebrum

      The biggest part of the brain is the cerebrum. The cerebrum is the thinking part of the brain and it controls your voluntary muscles the ones that move when you want them to. So you need your cerebrum to dance or kick a soccer ball.

      You need your cerebrum to solve math problems, figure out a video game, and draw a picture. Your memory lives in the cerebrum both short-term memory and long-term memory . The cerebrum also helps you reason, like when you figure out that you’d better do your homework now because your mom is taking you to a movie later.

      The cerebrum has two halves, with one on either side of the head. Scientists think that the right half helps you think about abstract things like music, colors, and shapes. The left half is said to be more analytical, helping you with math, logic, and speech. Scientists do know for sure that the right half of the cerebrum controls the left side of your body, and the left half controls the right side.

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      What Does Lewy Body Dementia Look Like

      Lewy body dementia affects a persons ability to think and process information and it can negatively impact memory and alter personality. Though it shares aspects of other forms of dementia, there are distinct hallmarks of LBD. Lewy body dementia symptoms include:

      • Fluctuating attention/alertness: These shifts can last hours or go on for days. The person may stare into space, appear lethargic or drowsy, and have hard-to-understand speech, appearing a lot like delirium. At other times, the person may have much more clarity of thought.
      • Visual hallucinations: Often, these are very detailed hallucinations and visions of people or animals, and they can recur.
      • Movement disorders: Parkinsons-like movement issues, such as muscle rigidity, tremors, falls, or a shuffling gait or way of walking, may occur.

      Cholesterol Is Key To Learning And Memory

      Up close with a human brain – BBC News

      The brain has a higher cholesterol content than any other organ. In fact, about 25% of the bodys cholesterol resides within the brain. The brain is highly dependent on cholesterol, but its cholesterol metabolism is unique. Because the blood-brain barrier prevents brain cells from taking up cholesterol from the blood, the brain must produce its own cholesterol. The brains cholesterol is much more stable than the cholesterol in other organs, but when it breaks down, it is recycled into new cholesterol right in the brain.

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      What Is A Brain Tumor

      A brain tumor is an abnormal growth or mass of cells in or around the brain. It is also called a central nervous system tumor.

      Brain tumors can be malignant or benign . Some tumors grow quickly others are slow-growing.

      Only about one-third of brain tumors are cancerous. But whether they are cancerous or not, brain tumors can impair brain function if they grow large enough to press on surrounding nerves, blood vessels and tissue.

      Tumors that develop in the brain are called primary tumors. Tumors that spread to the brain after forming in a different part of the body are called secondary tumors or metastatic tumors. This article focuses on primary tumors. There are more than 100 types of primary brain and spinal cord tumors.

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      How Hospice Can Help With End

      In addition to helping you in recognizing the signs of dying in the elderly with dementia, bringing in hospice care will help with the physical and emotional demands of caregiving. Nurses will be able to adjust medication and care plans as the individuals needs change. Aides can help with bathing, grooming, and other personal care. Social workers can help organize resources for the patient and family. Chaplains and bereavement specials can help the family with any emotional or spiritual needs. Additionally, family members can contact hospice at any time, and do not need to wait until it is recommended by the patients physician.

      To learn more about the criteria for hospice eligibility or to schedule a consultation, please contact Crossroads using the blue Help Center bar on this page for more information on how we can help provide support to individuals with dementia and their families.

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      The Human Brain Gets Smaller As We Get Older

      Human brain keeps developing until you are in your late 40s. It is the only organ in the human body to undergo development for such a long time. It also sees more changes than any other organ. Around mid-life, the brain will begin to shrink. However, size doesnt matter in the brain. There is no evidence that a larger brain is smarter than a smaller one.

      What Does A Memory In My Brain Look Like

      What does autism look like in the brain?

      Memories are not just about the past: they are what thought and self are made of. We visit the brains vaults to find out how they actually work

      By Clare Wilson

      IN THE Harry Potter films, they are silver streams that can be teased from the head with the tip of a wand. In the Pixar movie Inside Out, they are small glowing balls, stored in vast racks of shelving in our minds. But what does a memory really look like? How does your brain take information from the outside world and cache it for later retrieval? Where are your brains storage vaults, what do they look like and how do they work?

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