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Jul 17, 2024 · Brain Basics: Know Your Brain. The brain is the most complex part of the human body. This three-pound organ is the seat of intelligence, interpreter of the senses, initiator of body movement, and controller of behavior. Lying in its bony shell and washed by protective fluid, the brain is the source of all the qualities that define our humanity.
- What Is The Brain?
- What Is The Brain Made of?
- How Does The Brain Work?
- Lobes of The Brain and What They Control
- Deeper Structures Within The Brain
- Blood Supply to The Brain
- Cranial Nerves
The brain is a complex organ that controls thought, memory, emotion, touch, motor skills, vision, breathing, temperature, hunger and every process that regulates our body. Together, the brain and spinal cord that extends from it make up the central nervous system, or CNS.
Weighing about 3 pounds in the average adult, the brain is about 60% fat. The remaining 40% is a combination of water, protein, carbohydrates and salts. The brain itself is a not a muscle. It contains blood vessels and nerves, including neurons and glial cells.
The brain sends and receives chemical and electrical signals throughout the body. Different signals control different processes, and your brain interprets each. Some make you feel tired, for example, while others make you feel pain. Some messages are kept within the brain, while others are relayed through the spine and across the body’s vast networ...
Each brain hemisphere (parts of the cerebrum) has four sections, called lobes: frontal, parietal, temporal and occipital. Each lobe controls specific functions. 1. Frontal lobe.The largest lobe of the brain, located in the front of the head, the frontal lobe is involved in personality characteristics, decision-making and movement. Recognition of sm...
Pituitary Gland
Sometimes called the “master gland,” the pituitary gland is a pea-sized structure found deep in the brain behind the bridge of the nose. The pituitary gland governs the function of other glands in the body, regulating the flow of hormones from the thyroid, adrenals, ovaries and testicles. It receives chemical signals from the hypothalamus through its stalk and blood supply.
Hypothalamus
The hypothalamus is located above the pituitary gland and sends it chemical messages that control its function. It regulates body temperature, synchronizes sleep patterns, controls hunger and thirst and also plays a role in some aspects of memory and emotion.
Amygdala
Small, almond-shaped structures, an amygdala is located under each half (hemisphere) of the brain. Included in the limbic system, the amygdalae regulate emotion and memory and are associated with the brain’s reward system, stress, and the “fight or flight” response when someone perceives a threat.
Two sets of blood vessels supply blood and oxygen to the brain: the vertebral arteries and the carotid arteries. The external carotid arteries extend up the sides of your neck, and are where you can feel your pulse when you touch the area with your fingertips. The internal carotid arteries branch into the skull and circulate blood to the front part...
Inside the cranium (the dome of the skull), there are 12 nerves, called cranial nerves: 1. Cranial nerve 1: The first is the olfactory nerve, which allows for your sense of smell. 2. Cranial nerve 2: The optic nervegoverns eyesight. 3. Cranial nerve 3: The oculomotor nervecontrols pupil response and other motions of the eye, and branches out from t...
Mar 30, 2022 · Your brain is an essential organ. All of your emotions, sensations, aspirations and everything that makes you uniquely individual come from your brain. This complex organ has many functions. It receives, processes and interprets information. Your brain also stores memories and controls your movements. Advertisement.
Feb 20, 2024 · The three main parts of the brain are the cerebrum, cerebellum, and brainstem. 1. Cerebrum. Location: The cerebellum occupies the upper part of the cranial cavity and is the largest part of the human brain. Functions: It’s responsible for higher brain functions, including thought, action, emotion, and interpretation of sensory data.
The cerebral cortex is packed with neurons, about 16 billion of the total 86 billion neurons in the human brain, and is composed mostly of gray matter. In humans, the cerebral cortex houses most higher brain functions and complex cognition.
3 days ago · brain, the mass of nerve tissue in the anterior end of an organism. The brain integrates sensory information and directs motor responses; in higher vertebrates it is also the centre of learning. The human brain weighs approximately 1.4 kg (3 pounds) and is made up of billions of cells called neurons. Junctions between neurons, known as synapses ...
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Sep 4, 2018 · Picture 1: Parts of the Human Brain. The frontal lobe is located behind the forehead, and is responsible for considerable of the complex cognitive function: Reasoning, imagination, planning, values and behavior. The parietal lobe is located in the upper back of the frontal lobe. It covers the sensitive cortex (processing those messages related ...
