~~The part of our brain that control our movement ~~

( كَلَّا لَٮِٕن لَّمۡ يَنتَهِ لَنَسۡفَعَۢا بِٱلنَّاصِيَةِ (15) نَاصِيَةٍ۬ كَـٰذِبَةٍ خَاطِئَةٍ۬ (16 

Let him beware! If he desist not, We will drag him by the forelock― (15)A lying sinful forelock! (16) --- Al-Alaq


The phrase "A lying sinful forelock" in the paragraph above is really interesting.
Research conducted in recent years reveal that the prefrontal, which set the functions of specific brain, is located on the front of the skull bones.
The scientists are only able to find the function of this section during the period of 60 years, whereas the Qur'an has said it from 1400 years ago.
If we see the bones in the skull, on the front of the head, we will find the frontal cerebrum (cerebrum).


Book entitled Essentials of Anatomy and Physiology, which contains the findings of recent research on the function of this section, states:
--Encouragement and desire to plan and launch a movement going on in the front lobby frontal and prefrontal parts. This is the association korteks--...
(Seeley, Rod R.; Trent D. Stephens; and Philip Tate, 1996, Essentials of Anatomy & Physiology, 2nd edition, St. Louis, Mosby-Year Book Inc., S. 211; Noback , Charles R.; NL Strominger; and RJ Demarest, 1991, The Human Nervous System, Introduction and Review, 4th edition, Philadelphia, Lea & Febiger, s. 410-411)

The book also says:

In regard to the involvement in a stimulus, prefrontal areas are also believed as the function center of our behavior... (Seeley, Rod R.; Trent D. Stephens; and Philip Tate, 1996, Essentials of Anatomy & Pheysiology, 2nd edition, St. Louis, Mosby-Year Book Inc., s. 211)

So, the cerebrum is also tasked to plan, provide encouragement, and to start good and bad behavior, and responsible for the word of truth and falsehood.

It is clear that the phrase "A lying sinful forelock" actually refers to the description above. The facts that can only be known scientists for 60 years, God has stated in the Koran since about 1400 years ago.