Mind demise differs from a coma. An individual who’s brain-dead is taken into account lifeless, whereas an individual in a coma is just not. Though a comatose particular person is unconscious, the mind continues to be working and they’re due to this fact not thought of lifeless (per Higher Well being Channel). Oppositely, a person who’s mind lifeless should be respiratory, have a heartbeat, and even really feel bodily heat to the contact, however that is solely as a result of life assist is sustaining these capabilities, not the mind. Whereas restoration is feasible for sufferers in a coma, this isn’t the case for brain-dead sufferers who’re completely deceased.
Inform-tale indicators of mind demise embrace no response to ache, the absence of a gag reflex when stimulated, and no affected person respiratory operate as soon as the ventilator is turned off. The eyes additionally reveal so much with regards to mind demise. Pupils that don’t constrict in response to mild, the absence of a blink response when the eyeball is touched, and a scarcity of eye motion when the top is shifted are all indicators of mind demise. The absence of a vestibulo-ocular reflex, by which the eyes fail to answer ice water being allotted into the ear, can be an indication of mind demise. Lastly, EEG neuroimaging expertise will reveal no mind exercise in sufferers who’re mind lifeless.