[Biology Class Notes] on Difference between Brain and Mind Pdf

Before we proceed with the difference between mind and brain, let us discuss these two first.

What is Brain?

The brain is a critical component in our central nervous system located within the skull. It is the nodal point for receiving, organising and distributing information all across the body. It controls the function of most of the organs in our body.

How are the Brain and Mind Different?

The brain is the physical organ of the body that is present in the skull inside the head of all animals including insects. This part of the body governs all the activities performed by an organism like a central processing unit in your computers. It consists of tissues and nerve cells that are very complex with different sections dedicated to carrying out different specific functions. And it is connected to all parts of the body through nerve cells and neurons that transfer the external stimuli felt by the body through electrical signals. These electrical signals are in turn transferred by the chemicals present at the end of each nerve cell and their reactions with each other. To conclude, the brain is a tangible organ that commands the muscle tissues in our body to contract and expand for movement. 

The brain is also responsible for experiencing different feelings and depositing these feelings as memories in their designated sections and forming fine fibres as studied in Neurology. But against all this, there is another intricate activity carried out by the brain for the processing of feelings and memories that we gain as we live. This is termed as an experience in general terms. All these experiences collectively develop into a definite identity of a person and are termed the mind. It is not tangible like the brain but creates the thought process and perception ability of a person. 

The brain can be divided into three main parts – cerebrum, cerebellum, and brainstem.

Cerebrum: Cerebrum comprises the right and left hemisphere, and it is the largest part of the brain. It performs functions like interpretation of hearing, vision and touches as well as controlling learning and emotion, among others.

Cerebellum: Cerebellum is situated right under the cerebrum and coordinates muscle movement, maintenance of balance and posture, among others.

Brainstem: Brainstem connects cerebrum and cerebellum with the spinal cord and performs functions such as controlling body temperature, heart rate, breathing, sleep cycles, digestion etc. 

Do you Know?

Human brain, weighing about 3 pounds, is made up of 60% fat and generates close to 23 watts of power while the person is awake. It requires a steady blood supply, and an individual may lose consciousness even in a gap of 8-10 seconds. There are 100 billion neurons present in the brain, and the blood vessels stretch 100,000 miles in length.

What is Mind?

Mind pertains to a complex of faculties that are involved in remembering, perceiving, evaluating, considering and deciding among others. Even though mind and brain are used interchangeably in common phrasing, these two mean two distinct things. 

Our mind is categorised into three distinct levels – conscious, subconscious, and unconscious.

Conscious

It is the first level of our consciousness and refers to immediate experiences. It deals with the input from our senses, analysis of information, and undertaking decisions based on collated information.  

Subconscious

Subconsciousness is the next state that holds information which is beneath our immediate awareness. Such information may be archived as memories which do not readily come to the fore.

Unconscious

Unconsciousness is much deeper than our conscious awareness and is made up of primitive and instinctual desires. It influences our behaviour to a large extent, even though we may not be categorically aware of it.

Brain vs Mind

Brain is the physical organ inside the skull of the animals while the mind is a sense of consciousness that takes place inside the mind. All the memories of an organism are stored by the brain in the form of neuron fibres. Neuron fibres are the physical part of the brain while the function they perform is associated with the general intelligence of an organism.   

Test Your Knowledge 

i. Which of the following amounts to a quick response to the stimuli passing through the brain?

(a) Receptors.

(b) Knee-jerk.

(c) Voluntary action. 

(d) Reflex action.

ii. What is the outer covering of the brain covered by?

(a) Nerve cells. 

(b) Axons.

(c) Dendrites. 

(d) Pons. 

Solutions:

i. (d) Reflex action. 

ii. (a) Nerve cells. 

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