Pavamanah atharva, the perfect God sewing the head and the heart of man rising above the brain went away from the head.
In this verse there are three words used for the head. They all have some similarity in the meanings. These words are – Murdha, mastiska and shirsha. The head is called murdha because all the external objects are presevered in it in the form of image. Mastiska points out the brainal aspect of it. Shirsha indicates the sensual operation of the head. Thus all these three words are meaningful and purposeful here.
In the verse we find the verbal form of word “sansivya.” It means ‘having sewn’. It gives an idea that the cranium of the brain is sewn. It is not an ordinary sewing. If it is really sewn it would make us know that cranium has some parts. If there are some parts, what are they ? They are cerebrum, cerebellum and medula oblongata. They are three in numbers. They have been sewn by God. Thus it is obvious that the head which we call head has three divisions and these divisions are known as cerebrum, cerebellum and medula oblongata. This is the real idea of mastiska which we can draw from the above quoted verse of the Atharvaveda.