NERVOUS SYSTEM LENS SKIN

It also plays a part in language processing.įrontal lobe (pink): positioned at the front of the brain, the frontal lobe contains the majority of dopamine-sensitive neurons and is involved in attention, reward, short-term memory, motivation, and planning.

NERVOUS SYSTEM LENS SKIN

Touch stimulation from the skin is ultimately sent to the parietal lobe. Parietal lobe (yellow): the parietal lobe integrates sensory information including touch, spatial awareness, and navigation. Occipital lobe (purple): visual processing region of the brain, housing the visual cortex. Some aspects of language perception are also housed here. It is also involved in laying down long-term memories. Temporal lobe (green): important for processing sensory input and assigning it emotional meaning. The brain is roughly split into four lobes: However, many higher functions - reasoning, problem-solving, creativity - involve different areas working together in networks. To carry out these functions, some sections of the brain have dedicated roles. From physical motion to the secretion of hormones, the creation of memories, and the sensation of emotion. The brain is the central control module of the body and coordinates activity. Our brain uses around 20 percent of our body’s total energy. In total, around 100 billion neurons and 1,000 billion glial (support) cells make up the human brain. The brain is the most complex organ in the human body the cerebral cortex (the outermost part of the brain and the largest part by volume) contains an estimated 15–33 billion neurons, each of which is connected to thousands of other neurons. Now we will look at some of the parts of the CNS in more detail, starting with the brain. Click on it to interact and explore the model.

This is because they connect directly with brain tissue without intermediate nerve fibers.īelow is a 3D map of the CMS. The retina, optic nerve, olfactory nerves, and olfactory epithelium are sometimes considered to be part of the CNS alongside the brain and spinal cord. It also controls our breathing, heart rate, the release of some hormones, body temperature, and much more. The central nervous system has been thoroughly studied by anatomists and physiologists, but it still holds many secrets it controls our thoughts, movements, emotions, and desires. The brain and spinal cord are both housed within a protective triple-layered membrane called the meninges. The brain is protected by the skull (the cranial cavity) and the spinal cord travels from the back of the brain, down the center of the spine, stopping in the lumbar region of the lower back. The CNS consists of the brain and spinal cord.

Nervous system lens