Online communication between school and home. Online communication between home and school is the use of digital telecommunication to convey information and ideas between teachers, students, parents, and school administrators.
In more severe cases a coma may last for over five weeks, while some have lasted as long as several years. After this time, some patients gradually come out of the coma, some progress to a vegetative state, and others die. Some patients who have entered a vegetative state go on to regain a degree of awareness. Others remain in a vegetative state for years or even decades (the longest recorded period being 42 years). The outcome for coma and vegetative state depends on the cause, location, severity and extent of neurological damage.
Sometimes a coma is induced in patients who are at high risk of brain injury from incidents such as physical trauma, drug overdose or life-threatening seizures. By reducing the activity in the brain and slowing its metabolism, an induced coma can help protect the neural tissue.he conclusions may not extend to cases of comatose patients who have suffered major brain damage, he said. The newly discovered coma state is characterized by electrical waves called Nu-complexes that are unlike other waveforms generated by the brain during known coma states, sleep or wakefulness.