The Human Nervous System

The nervous system in the human nervous system controls our thoughts, emotions, and physical functions, so it is the most complex part of the body. It is an important element of science because it can bring new discoveries to treatments and diseases. Studies of the nervous system help to reduce cardiac disease, stroke, and mortality from accidents. The nervous system is a network of neurons (neurons send information to the brain for analysis, neurons live in the central and extracellular systems of the central nervous system).

The basic unit of calculation of the brain is a neuron. Approximately 86 billion neurons are found in the human nervous system and they lead to about 10 15 to 10 10 synapses. The figure below shows the cartoon of the biological neuron (left) and the general mathematical model (right). The idea is that the synaptic strength (weight w) is learnable and controls the influence and its direction: excitation (positive weight) or suppression (negative weight) to another neuron. In the basic model, dendrites send signals to the cell body where they are summed. When the final sum exceeds a certain threshold, the neuron radiates and sends a spike along its axon. In the computational model, the exact timing of the spike is irrelevant and we assume that only the frequency of the shot conveys the information.

Psychologists trying to understand human thoughts may study the nervous system. Learning the functions of cells and organs such as the brain helps to understand the biological basis behind human psychology. The nervous system consists of two basic cell types: glial cells (also known as glial cells) and neurons. The number of glial cells exceeds 10 to 1 neurons and is traditionally thought to support neurons in terms of physics and metabolism. Glial cells provide a scaffold for constructing the nervous system, neurons closely aligned with each other to allow neuronal communication, provide insulation to neurons, transport nutrients and waste products, and mediate immune responses I will help you. On the other hand, neurons as interconnected information processing devices are important for all tasks of the nervous system. This section briefly describes the structure and function of neurons.