Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
Consciousness |
a state of awareness of oneself and the environment |
|
|
What does consciousness involve? |
1. Arousal 2. content of thought |
|
|
Arousal |
- state of awakeness -mediated by reticular activating system -vegetative state: crude wakening state, reticular activating system and brain stem can maintain |
|
|
content of thought |
-all cognitive functions -awareness of self, environment, and affective states( moods) -mediated by all core networks under guidance of executive attention networks |
|
|
Factors that cause an altered level of arousal |
1. structural arousal alteration: above or below the tentorial plate 2. metabolic arousal alternation 3. psychogenic arousal alternation 4. pathologic processes: infectious, vascular, neoplastic, traumatic, congenital degenerative, polygenic, metabolic |
|
|
What are the subgroups of metabolic causes |
1. hypoxia 2. electrolyte disturbances 3. hypoglycemia 4. drug toxins ( endo and exo) |
|
|
pathophysiology: superatentorial |
processes above the tentorial plate -diffuse ( ex encephalitis) or localized dysfunction |
|
|
pathophysiology: subtentorial |
- processes below the tentorial plate -arousal declines: direct destruction of the reticular activating system ( by direct invasion or indirect impairment of blood supply) - compression / herniation, accumulation of blood/ pus, neoplasms, demyelinating disorders |
|
|
Glasgow Coma Scale |
neurologic scale that aims to give a reliable, objective way of recording conscious state of a person for initial as well as subsequent assessmet -score between 3( deep unconsciousness) and 14 or 15 |
|
|
What 5 categories of neurologic function are critical to the evaluation process |
-level of consciousness -pattern of breathing -size and reactivity of pupils -eye position and reflexive responses -skeletal muscle motor responses |
