BRAIN

Brain. Brain. Is very soft tissue and is surrounded by bony case called cranium. Which is made of skull bones. Cranium protects brain from injuries. The brain can be divided into three parts. Full brain, midbrain, and hindbrain. A, forebrain, forebrain is the largest part of the brain. The forebrain consists of cerebrum, thalamus, and hypothalamus, cerebrum forms the major part of the human brain, a deep groove in the middle of the cerebrum, divides into two equal halves. Each half is called as cerebral hemisphere. Right and left. The right and left cerebral hemispheres are connected to each other by a bundle of axons called curpos callosum. The outer potion of cerebral hemisphere is grey in color and is called cerebral cortex. The cerebral cortex contains motor areas. Sensory areas and large regions that are neither clearly sensory, not motor in function. These regions called as the association areas are responsible for complex functions like in the sensory associations, memory and communication. There are several ridges, elevations, called gyri, and grooves, called sulci, on the surface of the brain. They increase the surface area of the cortex. So that it can accommodate more number of neurons. 3D grooves present across each cerebral hemisphere, divided it into four lobes frontal. Temporal and occipital lobes, expression of emotional reactions, example excitement, pleasure, rage, and fear. And motivation. Midbrain midbrain consists of groups of nerve cells, and a large number of myelinated axons of the nerve cells present in other regions of the brain. Midbrain is located between the thalamus or hypothalamus of the forebrain and ponds of the hindbrain. A canal called the cerebral aqueduct passes through midbrain. The dorsal portion of the midbrain consists of four round swellings. Lobes, gall, corpora, quadrigemina, midbrain and hindbrain form the brain stem. Some of the nerve cells in this midbrain region control body muscles and their movements. See, hindbrain, hindbrain, comprises, bonds, cerebellum, and medulla oblongata.