ARE YOU LEFT HANDED??

ARE YOU LEFT HANDED??

Humans have two hands located at the distal end of each arm. The scientific use of the term hand in this sense to distinguish the terminations of the front paws from the hind ones is an example of anthropomorphism. 

 The philosophy of the “Hand” from the evolution of mankind has been the terminology fact that has been questioned marked from the era of evolution till now.

Left-handed people are more dextrous with their left hand apart from  their right hand. They will probably also use their left hand for all the tasks orientation. Writing is not suppose to be as good indicator of handedness as it might seems. As the fact that many people who write with their right hand, use their left for everything else.Approximately 10-14% of the population is left-handed.

People who can use both hands equally well are ambidextrous. True ambidexterity is rare. Generally, males are 3 times more likely to be left-handed than females. Statistically, one twin of a pair has a 20% chance to be left-handed. 

The human population is right handed dominated but no one knows the real fact about it yet. But there are certian assumption about the “Hand Theories”.

Evolutionary Assumptions

It is being assume by taking the example of Warrior and his shield/weapon. The position of warrior in the field of war with his weapon and shield in hand determines this assumption. Basically, since the heart is on the left side of the body, a warrior holding his shield with his left hand would be better able to protect his heart than if he held it with his right. 

Birth

Some researchers argue there is evidence for cases of "pathological" left-handedness related to brain trauma during birth. And many researchers trace the cause of handedness back to pre-natal, interuterine developmental processes, back to the time when the fetal brain is first developing distinct cerebral hemispheres.

Brain hemisphere

In this  theory, speaking and handiwork require fine motor skills having one hemisphere of the brain do both would be more efficient than having it divided up. This is the most commonly accepted theory of handedness.  It also predicts that left-handed people would have a reversed brain division of labour.

Genetic

Handedness runs in families, although even when both parents are left-handed, there is only a 26% chance of their child being left-handed. Thus, it is clear that genetics is not the only cause but many members of the British royal family are left-handed. Genetics is usually used to explain this.