Bystander Psychologist™️ @murithiwafundi - Twitter Profile

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Bystander Psychologist™️ @MurithiWaFundi

3 months ago

Your Brain Is a Biological Black Hole 🌀 Its one of the most remarkable biological structures in existence. Although it weighs only about 3 pounds (1.3–1.4 kg), it consumes approximately 20% of the body's oxygen and blood supply. This enormous energy demand allows it to generate every thought, memory, emotion, movement, and perception that shapes our reality. Without this continuous supply of energy, the brain cannot function, making it one of the most energy-intensive organs in the human body. The Three Major Parts of the Brain 1. The Cerebrum – The Processing Center The cerebrum is the largest part of the brain, recognizable by its deeply folded outer surface that maximizes its area. It contains billions of neurons responsible for higher mental functions, including: Language Memory Reasoning Conscious thought Decision-making Sensory processing Its extensive folds increase the available surface area, allowing more neurons to fit within the skull. 2. The Cerebellum – The Coordination Center Located beneath the cerebrum at the back of the brain, the cerebellum contains more than half of all the neurons in the brain despite occupying a relatively small volume. Its primary responsibilities include: Balance Coordination Precision of movement Motor learning Posture The cerebellum constantly performs rapid calculations that help the body move smoothly and accurately. 3. The Brainstem – The Autopilot System The brainstem connects the brain to the spinal cord and controls the body's automatic survival functions. These include: Breathing Heartbeat Digestion Blood pressure regulation Sleep and wake cycles Because these processes occur automatically, the brainstem works continuously without conscious effort. How Does the Brain Actually Think? The brain communicates through billions of specialized cells called neurons. Action Potentials Thoughts are not simply "electric sparks." Instead, neurons communicate using action potentials—rapid electrical signals that travel along nerve fibers. These signals trigger communication between neurons, allowing information to move throughout the nervous system. The Myelin Sheath Many nerve fibers are wrapped in a protective insulating layer called the myelin sheath. This insulation: Increases signal speed dramatically Prevents electrical interference Improves communication efficiency In some nerve fibers, electrical signals can travel at speeds approaching 120 meters per second (around 270 mph or 430 km/h). Synapses – Where Neurons Communicate Neurons do not physically touch one another. Instead, tiny gaps called synapses separate neighboring neurons. When an electrical impulse reaches the end of a neuron: The electrical signal stops. Chemical messengers called neurotransmitters are released. These chemicals cross the synaptic gap. The next neuron receives the message and generates a new electrical signal. This electrochemical process allows billions of neurons to exchange information continuously. The Brain's Greatest Superpower: Neuroplasticity Perhaps the brain's most extraordinary ability is neuroplasticity. Unlike a machine with fixed wiring, the brain is constantly changing. Every time you: Learn a new skill Practice something repeatedly Form a memory Recover from injury Adapt to new experiences …the brain strengthens existing neural connections, weakens unused ones, and can even create new pathways. This ability enables lifelong learning, adaptation, and recovery.

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Bystander Psychologist™️

@MurithiWaFundi

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