It is the brain that distinguishes humans from other living creatures. It allows us to act deliberately and think logically. It is the central management for all our thoughts, control center for practically every movement, the source of all our feelings and emotions, and equally responsible for conscious and unconscious actions.
The brain of an adult weighs between 1200 and 1500 g. The idea that the weight has some sort of correlation to intelligence is completely wrong. Compared to other living creatures, we certainly do not have the largest brain, either in absolute terms (elephant approx. 5000 g) or in relative terms in relation to body weight – a sparrow's brain is larger.
The brain is divided into four main sections: cerebrum (cerebrum), brain stem (truncus cerebri), diencephalon (diencephalon) and cerebellum (cerebellum). From an anatomical point of view, the essential difference between man and other vertebrates is in the cerebrum, which accounts for most of the human brain.
The cerebrum controls our deliberate actions and is also the center of intelligence, learning and teaching ability, memory, will and feelings. The cerebellum coordinates our movements, is responsible for balance and orientation in space. The brain stem controls among others respiration, blood circulation, sleeping/waking rhythm and our attention, and is directly or indirectly connected to all parts of the central nervous system.
The brain, which belongs to the central nervous system (or CNS), is protected, just like the spinal medulla (medulla spinalis), by a bony capsule (here the skullcap), and, similar to the spinal medulla, it is enclosed by meninges (meninges) that envelop the brain and the brain fluid (liquor cerebrospinalis), and work like padding.
The CNS is therefore protected mechanically on all sides both in the spinal medulla and in the brain itself by a bony layer, a layer of connective tissue and a layer of fluid in between.
The two thick bundles of nerve fibers, which connect the brain to the body muscles, are called pyramids or pyramidal tracts. At the so-called pyramidal decussation, the transition point from spinal medulla to the medulla oblongata, most of the fibers change side. This means that the left half of the brain controls motor response in the right side of the body, and the right half of the brain in the left side of the body. The pyramid can be detected with the naked eye as far as the Varolius bridge.
The Human 3D software features a labeled diagrams of the human brain as well as interactive media on the brain.
more information about Human 3D software
