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Related Concept Videos

Synteny and Evolution02:31

Synteny and Evolution

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John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
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Organization of the Brain01:30

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The brain is an integral component of the nervous system and serves as the center for processing sensory inputs, making decisions, and directing bodily actions. This complex organ is organized into three primary sections: the hindbrain, midbrain, and forebrain, each responsible for a range of vital functions.
Hindbrain
The hindbrain, located at the base of the brain, plays a vital role in regulating automatic processes that sustain life. It includes the medulla oblongata, which is essential for...
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Biological Influences on Intelligence01:30

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Intelligence is often thought to be linked to brain size, but the relationship is more complex than that. While brain size does correlate modestly with some abilities, like verbal skills, the connection is weaker for others, such as spatial reasoning. Other factors, like brain structure, also play crucial roles. For instance, despite Einstein's smaller-than-average brain, his parietal cortex, which is involved in spatial reasoning, was 15% wider, suggesting that neural density might matter...
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Introduction to Biological Bases of Psychology01:30

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Biopsychology serves as a vital bridge connecting the intricate domains of biology and psychology, shedding light on how biological systems influence psychological phenomena. This field scrutinizes the biological substrates of behavior and mental processes, emphasizing the nervous system along with the roles of neurotransmitters, hormones, and genetics. It also incorporates evolutionary perspectives to explain the adaptive nature of mental functions.
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Human Genetics01:28

Human Genetics

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
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Anatomy of the Brain: Major Regions01:20

Anatomy of the Brain: Major Regions

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The brain is the most complex organ in the human body. It consists of four main parts: the cerebrum, diencephalon, cerebellum, and brainstem.
The cerebrum is the largest section of the brain and divides into left and right hemispheres, separated by a deep fissure. The cerebral outer layer of grey matter — the cerebral cortex — comprises elevations called gyri and shallow groves called sulci. The inner portion of white matter includes long nerve fibers known as axons, which connect...
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Related Experiment Video

Updated: Mar 13, 2026

A Comparative Approach for Quantitative Cell Counting Studies in Widely Different Mammalian Brains
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The Molecular Basis of Human Brain Evolution.

Wolfgang Enard1

  • 1Department of Biology II, Ludwig Maximilian University Munich, Grosshaderner Str. 2, D-82152 Martinsried, Germany.

Current Biology : CB
|October 26, 2016
PubMed
Summary

Human brain evolution is explored through a comparative approach, investigating molecular changes linked to cognition, vocal learning, and brain size. This framework aids understanding of unique human traits.

Area of Science:

  • Neuroscience
  • Evolutionary Biology
  • Genetics

Background:

  • The human brain tripled in size since diverging from chimpanzees, enabling complex cognition, language, and cooperation.
  • Understanding the molecular basis of these evolutionary changes is crucial for biology and biomedicine.
  • Directly linking genetic changes to human brain evolution is challenging due to inability to cross or genetically manipulate humans and chimpanzees.

Purpose of the Study:

  • To outline a framework for obtaining indirect evidence on the molecular underpinnings of human brain evolution.
  • To review current findings on the molecular basis of human cognition, vocal learning, and brain size.
  • To propose future directions for research using comparative approaches and advanced technologies.

Main Methods:

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  • Reviewing existing literature on human brain evolution and molecular changes.
  • Proposing a comprehensive comparative framework leveraging cellular systems and genomic technologies.
  • Analyzing genetic and molecular data in the context of evolutionary divergence.

    • Main Results:

    • Identified key areas of interest: molecular basis of cognition, vocal learning, and brain size.
    • Highlighted the limitations of direct evidence and the need for indirect approaches.
    • Emphasized the potential of comparative genomics and cellular systems for future insights.

    Conclusions:

    • A comprehensive comparative approach is essential for understanding the molecular evolution of the human brain.
    • Future research should integrate cellular systems and genomic technologies to uncover evolutionary links.
    • This framework provides a roadmap for investigating the genetic and molecular basis of unique human cognitive abilities.