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Myelin (/ ˈ m aɪ. ə l ɪ n / MY-ə-lin) is a lipid-rich material that surrounds nerve cell axons to insulate them and increase the rate at which electrical impulses (called action potentials) pass along the axon. [1] [2] The myelinated axon can be likened to an electrical wire (the axon) with insulating material (myelin) around it. However ...
The maturation of myelination in intracortical layers coincides with critical period closure in mice, which has led to further research on the role of myelination on critical period duration. [ 37 ] Myelin is known to bind many different axonal growth inhibitors that prevent plasticity seen in critical periods. [ 38 ]
Death anxiety – a morbid, abnormal or persistent fear of one's own death or the process of his/her dying. One definition of death anxiety is a "feeling of dread, apprehension or solicitude (anxiety) when one thinks of the process of dying, or ceasing to 'be'". Also known as thanatophobia (fear of death). Mortality salience –
Death anxiety refers to the fear of death and the unknown that comes with it. Adult attachment, on the other hand, refers to the emotional bond between two individuals, often romantic partners, that provides a sense of security and comfort. Research has shown that there is a complex relationship between death anxiety and adult attachment. [68]
The T cells recognize myelin as foreign and attack it, explaining why these cells are also called "autoreactive lymphocytes". Demyelination, further inflammation and axonal transection are the result. The attack of myelin starts inflammatory processes, which triggers other immune cells and the release of soluble factors like cytokines and ...
Furthermore, the post-synaptic end plate grows deeper and creates folds through invagination to increase the surface area available for neurotransmitter reception. At birth, Schwann cells form loose, unmyelinated covers over groups of synapses, but as the synapse matures, Schwann cells become dedicated to a single synapse and form a myelinated ...
The fear of the end of life and its existence is, in other words, the fear of death. Historically, attempts were made to reduce this fear by performing rituals which have helped collect the cultural ideas that we now have in the present. [citation needed] These rituals also helped preserve the cultural ideas. The results and methods of human ...
Motivated by the lack of instruction in medical schools on the subject of death and dying, Kübler-Ross examined death and those faced with it at the University of Chicago's medical school. Kübler-Ross's project evolved into a series of seminars which, along with patient interviews and previous research, became the foundation for her book. [ 12 ]