StudentShare solutions
Triangle menu

Sleep and consciousness - Essay Example

Nobody downloaded yet

Extract of sample
Sleep and consciousness

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 ...Show more


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…
Author : cmohr
Sleep and consciousness essay example
Read Text Preview
Save Your Time for More Important Things
Let us write or edit the essay on your topic
"Sleep and consciousness"
with a personal 20% discount.
Grab the best paper

Check these samples - they also fit your topic

Human Sleep-Wake Cycle
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.
3 pages (750 words) Essay
Sleep Paralysis
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.
6 pages (1500 words) Essay
Sleep: Underrated in America
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.
3 pages (750 words) Essay
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.
3 pages (750 words) Essay
The Biology of Sleep
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.
13 pages (3250 words) Essay
Sleep Deprivation Amongst Employees
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
20 pages (5000 words) Essay
The Relationship Between Phenomenal Consciousness And Access Consciousness
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,
6 pages (1500 words) Essay
Sleep: Underrated in America
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
3 pages (750 words) Essay
Recently it has been studied that consciousness continues even when the brain stops working. We continue to experience consciousness 3 minutes after death while the brain is long dead. When
3 pages (750 words) Essay
Hire a pro to write
a paper under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger
Your email
Comments (0)
Click to create a comment