Human Brain
➖The brain of a human being is the central organ of the nervous system.
➖The human brain consists of three parts namely the cerebrum, the brainstem and the cerebellum.
➖The brain of a human being plays significant role, as it controls most of the activities of the human body.
➖The brain is located inside the head, and protected by the skull bones.
➖The brain consists of more than 86 billion neurons and almost equal number of other cells as well.
➖Brain activity is made possible because of the interconnections of all the neurons that are linked together.
➖The study of brain functions is known as neuroscience.
➖An adult human brain weighs about 1.2 to 1.4 kg (i.e. average weight); which is about 2% of the total body weight.
Parts of Human Brain
➖A human brain is primarily classified as the −
➭ Forebrain
➭ Midbrain
➭ Hindbrain
➖Forebrain is largely made up of cerebrum, thalamus, hypothalamus and pineal gland.
➖Midbrain is largely made up of a portion of the brainstem.
➖Hindbrain largely made up of the remaining brainstem, cerebellum and pons.
➖Further, the (brain) hemisphere is conventionally classified into four lobes namely −
➭ Frontal lobe
➭ Parietal lobe
➭ Temporal lobe
➭ Occipital lobe
➖The naming is done according to the skull bones that overlie them.
Cerebrum
➖Divided into nearly symmetrical left and right hemispheres by a deep groove, the cerebrum is the largest part of the human brain.
➖Cerebrum normally controls higher brain functions including language, logic, reasoning, and creativity.
Functions of Human Brain
➖Perceive or sense the signal coming from the (external) environment
➖Giving sense of feelings and emotion
➖Regulating and controlling the human behaviors
➖Regulating and controlling the physical action
➖Regulating the memory function
➖Process of thinking (and other cognitive process)
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