The Dynamic Duo: Heart and Brain – Unraveling Their Intricate Connection Introduction The human body is a marvel of complexity and coordination, with every organ and system playing a vital role in maintaining our health and well-being. Among the most fascinating and integral components of our body are the heart and the brain. These two…
YOUTH & PLASTICITY The younger the brain, the more plastic it is. Young brains have the ability to learn and adapt with great ease. Young brains even have the potential to rewire themselves, and are thus able to overcome severe trauma, such as damage to an entire hemisphere. For example, a seven-year-old named Michael in…
LEARNING LANGUAGE [ BRAIN DEVELOPMENT ] The enhancement and pruning of neural networks occurs most apparently as the baby begins to develop language. Spoken languages can sound very different from each other. In all, human languages produce about 200 different spoken sounds, called phonemes. Spoken English contains just over one-sixth of those possible sounds. Brain…
A NEW BRAIN FROM THE WOMB TO CHILDHOOD WHEN SPERM meets egg, the merger of a father’s and mother’s DNA triggers the start of a new life. Encoded in the tens of thousands of genes that make up a human being are a substantial fraction that will create the brain and central nervous system. You…
SPECIALIZATION BEGINS As modern humans evolved from their hominid ancestors, their brain development continued with increasing specialization of regions and functions. One hypothesis suggests that the differences between the left and right hemispheres of the human brain can be traced to humans’ simian ancestors swinging through trees. Grasping one limb after another requires the arms…
THE THREE BRAINS – EVOLUTION [ MACLEAN ] THE THREE BRAINS Neuroscientist Paul MacLean suggested in 1967 that the human brain functions as three separate “brains,” each of which represents a stage in evolutionary development. He referred to the three-way unity as humanity’s triune brain. Through evolution’s penchant for preserving genetic code that proves useful…
EVOLUTIONARY CLUES OR PAVLOV’S DOGS EVOLUTIONARY CLUES Some of humanity’s evolutionary history can be observed in the development of a human fetus. As chicken and human embryos develop, for example, they experience a stage where they both have a tail, as well as arches and slits in their neck remarkably like the gill slits and…
EVOLUTION – GROWING COMPLEXITY [ BRAIN DEVELOPMENT ] GROWING COMPLEXITY If 2,000 neurons are sufficient for simple learning, imagine the explosion of complex behavior that accompanied the growth of neural complexity about 530 million years ago. Larger clumps of neurons in the diverse animal population that seemingly emerged overnight encouraged the flourishing of new animal…
BRAIN DEVELOPMENT – EVOLUTION [ GROWTH & ADAPTATION OF THE HUMAN BRAIN ] FROM THE single celled product of conception, the human animal grows into a complex, uniquely cognitive being. Evolution has built upon older, more primitive animal brain forms to lead humanity to emotion and rational thought. Over eons of time, neural circuitry has…
Introduction to the Nervous System The nervous system is a complex and highly specialized network that plays a pivotal role in maintaining the body’s overall functionality and health. It is responsible for coordinating and regulating various bodily functions, ensuring that all systems work in harmony. At its core, the nervous system comprises three primary components:…