Chapter 17: Alteration in Conitive Systems, Cerebral Hemodynamics, and Motor Function COPY COPY Flashcards
Name the three major neural systems involved in functional adequacy
Cognitive
Sensory
Motor
State of awareness of both oneself and the environment and a set of responses to that environment
Full Consciousness
State of being awake, mediated by the reticular-activating system
Arousal
Encompasses all cognitive functions and is mediated by attentional, memory, language, and executive systems
Awareness
Loss of the ability to think rapidly and clearly; impaired judgement and decision making
Confusion
Beginning loss of consciousness; disorientation time, followed by disorientation to place and impaired memory; recognition of self is lost last
Disorientation
Limited spontaneous movement or speech; easy arousal with normal speech or touch; may not be oriented to time, place, or person
Lethargy
Mild-to-moderate reduction in arousal with limited response to the environment; falls asleep unless verbally or tactilely stimulated; answers questions with minimum responses
Obtunded
Condition of deep sleep or unresponsiveness; person may be aroused or caused to open eyes only by vigorous and repeated stimulation; response is often withdrawal or grabbing at stimulus
Stupor
No verbal response to the external environment or to any stimuli; noxious stimuli such as deep pain or suctioning yields motor movement
Coma
Associated with purposeful movement on stimulation
Light coma
Associated with unresponsiveness or no response to any stimulus
Deep coma
Prolonged inspiratory and expiratory phases caused by inujury to the pons or upper medulla
Apneustic Respirations
Periods of rapid respirations of near equal depth, resulting from trauma or compression to the medulla or rom chronic opioid abuse
Cluster respirations
Irregular respirations with prolonged periods of apnea associated with damage to the medulla
Ataxic Respirations
Loss of past memories
Retrograde amnesia
Inability to form new memories
Anterograde amnesia
Loss of comprehension or production of language
Aphasia
Expressive and Receptive
Dysphasia
Expressive dysphasia of speech and writing but with retention of comprehension
Broca Aphasia
Involves anterior and posterior speech areas, with expressive and receptive aphasia
Global aphasia
Progressive failure of cerebral functions that cause impairment
Dementia
Greatest risk factors for Alzheimer Disease
age and family hx
Treatment for AD
no disease-arresting therapies available
Cholinesterase inhibitors can enhance cholinergic transmission
Antiamyloid drugs
onset is less than 60 years of age, rare, severe degenerative disease of the frontal lobes
Frontotemporal Dementia
Sudden, transient disruption in normal brain electrical function caused by abnormal excessive discharges of cortical neurons
Seizure
A recurrence of seizures and a disorder for which no cause can be found
Epilepsy
A tonic-clonic (jerky/contracted/relax) movements associated with some seizures
Convulsions
When seizure activity lasts for more than 30 minutes
Status Epilepticus
Six causes of epilepsy
Genetic Structural Metabolic Immune Infections Unknown
The person initially stiffens and loses consciousness, causing them to fall to the ground
Tonic Phase
Rhythmic twitching or jerking of one or several muscles
Clonic Phase
Normal ICP level
5-15 mmHg/60-180 mm/H2O
Stage 1 of Increased ICP causes
Vasoconstriction and external compression
Stage 2 of Increased ICP shows continued:
expansion of intracranial content
Stage 3 of increased ICP:
Brain hypoxia and Hypercapnia; Autoregulation lost
Stage 4 of increased ICP:
Herniation
Increase in the fluid (ICF or ECF) within the brain
Cerebral Edema
The clinically most important type of cerebral edema
Vasogenic
Slow onset, usually from antipsychotic drugs
Tardive Dyskinesia
Abnormal, involuntary movements that occur as spscm
Paroxysmal Dyskinesia
Severe degeneration of the basal ganglia (corpus striatum) involving the dopaminergic nigrostriatal pathway
Parkinson’s Disease
A degenerative disorder diffusely involving the lower and upper motor neurons. Movement is more affected than the brain. Progressive muscle weakness leads to respiratory failure
Amyotrophic Lateral Sclerosis (Lou Gehrig Disease)
Pathological laughter or crying
Hypermimesis
Loss of voice modulation
Hypomimesis