Outline
Introduction
Definition of unconsciousness
Components of unconsciousness
Causes of coma
Pathogenesis of coma
Approach to the unconscious patient
Prognosis
Differential diagnosis of coma
Brain death
References
Introduction
Consciousness is the state of being aware and responsive to oneβs surroundings.
The Reticular Activating System (RAS) of the brainstem and thalamus and its broad connections to the cerebral hemisphere maintains wakefulness
Unconsciousness arise by distortions (functional or metabolic) of the neurons the RAS
Unconsciousness is a state in which a patient is totally unaware of both self and external surroundings and unable to respond meaningfully to external stimuli.
