PSYA01H3 Chapter Notes - Chapter 2.1: Neuroglia, Multiple Sclerosis, Myelin
Document Summary
The electrical and chemical activities of neurons are the starting point of all behaviour, thought, and emotion. Neurons cells in the nervous systems that communicate with another to perform information. 1800s scientists started studying the harder-to observe workings of the brain from the mechanics of limbs, lungs and livers. Philosopher"s thought of the brain an enchanted loom that mysteriously wove a tapestry of behaviour. Many scientist confirmed this the brain looked as though it were composed of a continuously connected lattice of fine threads one big woven web of material. In many neurons, the axon is covered by a myelin sheath: myelin sheath insulating layer of fatty material. An axon insulated with myelin can more efficiently transmit signals to other neurons, organs or muscles. Myelin sheath deteriorates, slowing the transmission of information from one neuron to another. This leads to a variety of problems loss of feeling in the limbs, partial blindness, difficulties in coordinated movement and cognition.
