Chapter 34.6, Problem 18SAQ

Summary Introduction

To draw: The brain, label the lobes and write their primary functions.

Introduction:

Brain is the most complex organ of all. Its functioning is as complex as is its structure. According to their functions and positions the different regions of the brain have been divided into four lobes, namely: frontal, parietal, temporal and occipital.

Explanation of Solution

Pictorial representation:

Fig. 1: The four lobes of the brain.

The four lobes of the brain are:

(1) Frontal lobe: This lobe is the most anterior of all the lobes in the cerebral cortex just behind the forehead. Its primary function is to do planning and decision making.

(2) Parietal lobe: It is posterior to the frontal lobe, with central sulcus separating these two lobes. This helps in performing complex tasks like dressing up and it also controls the body’s awareness.

(3) Temporal lobe: It is present inferior to the parietal lobe. It helps in the processing of sound, aids recognition, naming, reading and language.

(4) Occipital lobe: It is the posterior most lobe in the brain and lies below and behind the parietal lobe. Its main function is the processing of visual stimuli.

Conclusion

The four lobes of the brain perform different important functions of the body and helps the body to respond to the stimulus appropriately.