Introduction
=> 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)