Laureys: Death, unconsciousness and the brain. This article reviews the how definitions of death have changed with medical progress and understanding of the critical role of the brain in meaningful life.
There have been many definitions proposed for the term death with most…
Some scientist and philosophers have defined death based on the functioning of the circulatory system as a state when there is irreversible cessation of circulation. Since different definitions have been given to explain death, there are several criteria’s that are used to determine death. In case of whole brain damage complete cessation of all clinical functions is a major criterion which could be demonstrated as coma. Similarly irreversible cessation of brainstem functions with absence of brainstem reflexes. Other criteria include absence of any other confounding factors, absence of motor responses, and apnoea. Neurological and cardiopulmonary tests are done to ascertain the death of an individual. In the neurological tests irretrievable brain stem function is determined, while in the cardiopulmonary test irretrievable absence of heart beat and breathing are determined. However, after much debate it has been decided that the cardiopulmonary criteria of death which declares that the heart will not auto-resuscitate and which occurs first is a sufficient enough criterion to declare that a person is dead as it might take some time for the neurological criteria to occur.
b) How do brain death and vegetative state differ? Consider a) behavioral, respiratory (“apnoea”means lack of breathing), b) damage to specific brain structures, and c) brain activity (e.g. EEG, fMRI, PET).
The major criterion for a person to be declared brain dead is presence of coma characterized by irreversible brain damage, while in the case of vegetative state; a person is awake but totally unaware of the surroundings. Such a vegetative state can be partially or totally reversed. However persistent vegetative state cannot be reversed. Brain death can be diagnosed more quickly that irreversible vegetative state as it may take any where between 3 to 12 months depending on the extent of injury to the brain to ascertain vegetative state. Brain dead patients require artificial ventilation ...
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(Sleep and Consciousness Essay Example | Topics and Well Written Essays - 500 Words)
“Sleep and Consciousness Essay Example | Topics and Well Written Essays - 500 Words”, n.d. https://studentshare.net/miscellaneous/384205-sleep-and-consciousness.
This event is regulated by both “sleep homeostasis and circadian rhythms” (National Sleep Foundation, 2006). Processes in circadian rhythm are at its peak during daytime, which counteracts influence of homeostatic sleep pressures, but decreases as the day wears out.
This is usually accompanied by dreaming when someone awake; hallucinations in some people. This is exhibited majorly in seeing other people in the room, touch sensation, footsteps hearing, hearing people call you among others. In the article, he identifies that chronic sleep paralysis only affect around six percent of the general adult population.
Sleep is conventionally referred to as a naturally recurring state that is characterized by relatively suspended sensory activities, absent or abated level of consciousness and a general inactivity of almost all suspended muscles.
There are states of partial consciousness which can be revoked by stimulation. A person spends about one-third of his life whilst sleeping. Sleep is significant for every person because it recharges his body and mind. It makes him fresh because it is a crucial ingredient that goes into delivering work regimes on an out and out basis.
Besides addressing the core issue of sleep, it also explains phenomenon like dreams and sleep disorders, which are intimately related to sleeping.
Biologically, sleep is defined as a state of reduced motor activity (movement), lower response to sensory stimulation, adoption of postures such as lying down with eyes closed and easy reversibility.
In cases where physiology is not the cause of sleep deprivation, it is largely up to the individual to be sure to get enough sleep; companies are being encouraged to educate employees on the importance of sleep and time management, yet to little avail. What can be done about this complex and serious problem
This is to say that this type of consciousness has the experimental state or properties which demonstrate i.e. “what an item is like.” Such states are achieved by such senses as feelings, and perceptions, with exceptions of thought,
In a highly capitalist world which is characterized by cutthroat competitiveness, the incessant quest for profit maximization and an unrelenting pressure to achieve, the tendency to sidestep or disregard