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Does size matter - Brain size and intelligence?

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<img alt="Brain Size and Intelligence - Are the Two Related?" class="ly-health-story__media__img" height="267" src="http://static.lybrate.com/eagle/uploads/cca97c80d89ae5468547088748abbee7/342431.jpg" width="400" /> </div>
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When it comes to the brain 
and IQ, is bigger better? Does size really matter? Is there really a 
connection between the size of your brain and intelligence? With the 
help of findings by neurologists and scientists, we seek to find out! </div>
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Dr.
      Jigar Parekh
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DM - Neurology</div>
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     <span>Neurologist</span>
     
       • 90%
       
        (105 ratings)
       
     
     
       • 
      <span>1 year experience</span></div>
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<span><img alt="Dr. Jigar Parekh  | Lybrate.com" class="person__img-wrapper__img" src="https://static.lybrate.com/img/documents/doctor/dp/74f0ea31dcd43ca6f885b4dc42761e8a/crop_100x100/Neurology-JigarParekh-ahmedabad-444fb6.JPG" /> </span>
     
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<ol>
<li><strong>Ailments and the brain:</strong> Scientists have found that
 children with autism have a brain that has grown in a disproportionate 
manner in the very first year of their life. This prevents the child 
from making connection in a normal manner. On the other hand, children 
and adolescents who suffer from Attention Deficit Hyperactivity Disorder or ADHD
 show sign of having a much smaller brain size. Many scientists have 
shown that the size of the brain shrinks as we age and this does not 
have any visible effect on our cognitive abilities. </li>
<li><strong>It’s all relative:</strong> The size of the brain does not 
really have a bearing on the way a person’s cognition gets shaped. Even 
large mammals like elephants and whales are finally hunted and tamed by 
humans who have smaller brains in comparison. The brain is made up of 
billions of neurons, which need to function properly. It may be seen 
that scientists consider the brain mass in relation with the rest of the
 body so as to speculate about the cognitive abilities of the person. 
Why is this required? Large animals need a well functioning and 
proportionate brain size to control and run their organs with proper 
cognition for satisfactory results, which is what we humans seem to have
 done.</li>
<li><strong>Neanderthal brain:</strong> Historically, the earliest man 
or the Neanderthals are said to have had larger brains than we do. These
 people are believed to have brains that are at least 10% larger than 
the brains that we have in our modern times. The shape of their brain 
was different too. They were also heavily muscled people which had a 
bearing on the size and shape of the brain and bodies as well as the 
lean tissue within the brain. They also survived very successfully for a
 period of over 200,000 years, which obviously points to some form of 
elevated cognition, as per many scientists.</li>
<li><strong>Animals:</strong> While animals with small brains like 
lizards and reptiles do not perform too well on IQ tests, the animals 
with bigger brains like elephants and dolphins perform much better. But 
the medium sized brain of monkeys, lemurs and other animals are said to 
perform in the best manner. The correlation between the body size and 
the brain does not seem to hold good here, as per various researches.</li>
</ol>
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Does size matter - Brain size and intelligence?

When it comes to the brain and IQ, is bigger better? Does size really matter? Is there really a connec...