The Human Brain

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Not all researchers necessarily agree with McDaniel's conclusions. Such studies also raise important questions about how we define and measure intelligence, whether we should account for relative body size when making such correlations, and what parts of the brain we should be looking at when making such determinations. It is also important to note that when looking at individual differences among people, brain size variations are relatively small.

Data Stories - Visualizing the human brain

Other factors that may influence or play a pivotal role include the density of neurons in the brain, social and cultural factors, and other structural differences inside the brain. Have you ever wondered what your personality type means? Sign up to get these answers, and more, delivered straight to your inbox. McDaniel, M. Intelligence, 33, Park, A.

April 16, Schoenemann, P. Brain, Behavior and Evolution. More in Theories.


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In terms of weight, the average adult human brain weighs in at to grams or around 3 pounds. In terms of length, the average brain is around 15 centimeters long.

The Human Brain: Anatomy and Function

For comparison, a newborn human baby's brain weighs approximately to grams or three-quarters of a pound. Men tend to have bigger brains than women. The brain receives input from the sensory organs and then sends out the output to the muscles. The human brain is made up different parts and compartments, for each of the functions. Take a look at the different parts of the brain.

Source — Wikipedia. It is the main thinking part of the brain and controls the voluntary actions. The forebrain processes sensory information that is collected from the various sense organs such as ears, eyes, nose, tongue, skin.

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It is because of the presence of forebrain, humans are placed at the highest level in the animal chain. The cerebrum is the biggest part of the brain. This part we associate with higher brain functions such as thinking and action.

Facts about the human brain

It contains the cerebral cortex and other subcortical structures. The cerebral cortex is highly wrinkled and makes the brain very efficient.


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  • Now the cerebral cortex again divides into four divisions called lobes. They are:. The cerebrum is divided into two halves by a deep furrow. These halves are the left and right hemispheres. Each side functions slightly different from the other, even though they are symmetrical. So the right hemisphere links to creativity whereas the left hemisphere relates to logic abilities.


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    Brain , the mass of nerve tissue in the anterior end of an organism. The brain integrates sensory information and directs motor responses; in higher vertebrates it is also the centre of learning. See nervous system, human. In lower vertebrates the brain is tubular and resembles an early developmental stage of the brain in higher vertebrates. It consists of three distinct regions: the hindbrain , the midbrain , and the forebrain.

    Although the brain of higher vertebrates undergoes considerable modification during embryonic development, these three regions are still discernible. The hindbrain is composed of the medulla oblongata and the pons.

    About The Brain - CogniFit

    The medulla transmits signals between the spinal cord and the higher parts of the brain; it also controls such autonomic functions as heartbeat and respiration. The pons is partly made up of tracts connecting the spinal cord with higher brain levels, and it also contains cell groups that transfer information from the cerebrum to the cerebellum. The midbrain, the upper portion of which evolved from the optic lobes, is the main centre of sensory integration in fish and amphibians.

    It also is involved with integration in reptiles and birds.

    In mammals the midbrain is greatly reduced, serving primarily as a connecting link between the hindbrain and the forebrain. Connected to the medulla, pons, and midbrain by large bundles of fibres is the cerebellum.

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    The forebrain includes the cerebral hemispheres and, under these, the brainstem , which contains the thalamus and hypothalamus. The thalamus is the main relay centre between the medulla and the cerebrum; the hypothalamus is an important control centre for sex drive , pleasure, pain, hunger, thirst, blood pressure , body temperature, and other visceral functions.

    The hypothalamus produces hormones that control the secretions of the anterior pituitary gland , and it also produces oxytocin and antidiuretic hormone , which are stored in and released by the posterior pituitary gland.

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