The Neurologic System
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Transcript of The Neurologic System
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CHAPTER
Gerontological Nursing, Second EditionPatricia A. Tabloski
The Neurologic System
22Lecture Note PowerPoint Presentation
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Gerontological Nursing, Second EditionPatricia A. Tabloski
LEARNING OUTCOME 1Describe the components of the neurological
system.
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Neurological System
• Central nervous system (CNS)– Brain– Spinal cord
• Peripheral nervous system– Cranial nerves– Spinal nerves– Somatic nervous system– Autonomic nervous system– Reflex arc
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Figure 22-1An illustration of the right hemisphere of the brain. In dark brown, the cerebellum. In
beige, from bottom to top, the medulla oblongata and the pons. Just above it and slightly lighter, the corpus callosum.
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Gerontological Nursing, Second EditionPatricia A. Tabloski
LEARNING OUTCOME 2Describe progressive dementias.
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Dementia
• Progressive disorder• Characterized by a loss of cognition and at
least one of the following– Ability to speak coherently and understand
language– Ability to recognize or identify objects– Ability to execute motor activities– Ability to think abstractly, make sound
judgment, and plan and carry out complex tasks
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Dementia
• Aging is the greatest risk factor • Clinical diagnosis
– Loss of intellectual ability with impairment that interferes with social or occupational functioning
– Delirium has been ruled out
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Dementia
• Risk factors– Delirium– Mild cognitive impairment– Vascular dementia
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Dementia
• Types– Alzheimer’s disease (AD)
Abnormalities in the brain structure disrupts the health of neurons
Manifestations include memory failure, personality changes, and difficulty with ADLs
Causes• Genetics• Age• Gender• Race• Head injury• Environmental exposures
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Dementia
• Types– Vascular dementia
Abrupt onset of dementia Focal neurological findings Low-density areas indicate vascular changes in
white matter Multiple strokes in CT or MRI present Unchanged personality Emotional problem
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Dementia• Types
– Lewy body dementia Clinical features persist over long period of time
resulting in severe dementia Lewy bodies and Lewy neuritis found in brain
structures– Frontotemporal lobe dementia
Diagnosed based upon personality changes Presence of frontal brain area atrophy in CT or
MRILewy bodies : are abnormal aggregates of protein that develop inside nerve cells in
Parkinson's disease (PD) and Alzheimer's disease (AD) and some other disorders.
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Gerontological Nursing, Second EditionPatricia A. Tabloski
LEARNING OUTCOME 3
Discuss the stages of Alzheimer’s disease and implications for nursing care.
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AD
• Progressive disorder• Results in the death of nerve cells
– Memory failure– Personality changes– Increasing inability to manage activities of
daily living
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Figure 22-4Plaques and tangles: The hallmark of AD.
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Gerontological Nursing, Second EditionPatricia A. Tabloski
AD
• Diagnosis– History– Physical examination– Neuropsychological testing– Definitive diagnosis: autopsy after death
Autopsy : is a medical procedure that consists of a thorough examination of a body to determine the cause and manner of death and to evaluate any disease or injury that may be present
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Gerontological Nursing, Second EditionPatricia A. Tabloski
AD
• Risk factors– Advancing age– Family history– Head trauma– Diabetes mellitus– Clinical depression
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Gerontological Nursing, Second EditionPatricia A. Tabloski
AD
• Stages– Stage 1, Mild– Stage 2, Moderate– Stage 3, Severe
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Nurse’s Role
• Promote independence and autonomy• Prevent complications• Provide comfort• Promote quality of life• Education
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Planning Care
• No cure available• Goals of treatment
– Slow progression– Manage manifestations
• Caregiver experience needed– Long-term care– End-of-life care
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Planning Care
• Challenging behaviors and psychiatric symptoms develop in the AD patient
• Settings used to care for AD patients– Individual’s home or family member’s home– Hospitals– Long-term-care facilities (nursing homes)– Congregate living facilities– Hospice settings
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Pharmacological Interventions
• Cholinesterase inhibitors– Slow progression of symptoms– Titrate dosages slowly
Donepezil (Aricept) Rivastigmine (Exelon) Galantamine (Reminyl)
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Pharmacological Interventions
• Memantine (Namenda)– N-methyl-d-aspartate (NMDA) antagonist
• Alternative and complementary therapies– Vitamin E: limited support, more study needed– Nonsteroidal anti-inflammatory drugs/statins:
patients taking these have reduced development of AD
– Statins:are a class of drug used to lower cholesterol levels by inhibiting the enzyme HMG-CoA reductase.
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Environmental Safety
• Modify home to promote safety• Door locks• Secure rugs• Decrease water heater temperature• Handrails in bathroom
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Functional Impairments
• Utilize therapeutic nonverbal behaviors• Avoid fatigue, nonroutine activities, and
alcohol• Avoid a high-stimulus environment• Prevent disability• Treat other conditions that lead to physical
decline
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Functional Impairments
• Identify and respond rapidly to acute changes in function
• Adapt care to accommodate neuromotor changes secondary to progression of dementia
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Mood Disorders
• Be alert for changes– Appetite– Disinterest– Anhedonia– Sleep abnormality– Fatigue
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Delusions and Hallucinations
• Cause– Delirium– Interaction of dementia and personality– Separate mental disorder coexisting with
dementia– Disinhibition of cortical functions
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Dependence in ADLs
• Promote, preserve functional independence
• Preventive plans of care
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Inability to Initiate Meaningful Activities
• Results in apathy or agitation for dementia sufferer
• Promote social involvements
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Anxiety
• May be a primary disorder or a symptom of depression
• May result from delusions, hallucinations, or functional impairment
• Plan interventions to reduce stress, enhance feelings of trust and safety
• Promote stability• Provide diversion activities
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Spatial Disorientation
• Results in incorrect interpretation of objects or directions
• Results in fear, anxiety, suspicions, illusions, delusions, and safety concerns
• Promote familiarity with environment• Use landmarks to provide “pop-up” cues
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Elopement
• A valid concern in individuals with cognitive impairments
• Risk factors• Alzheimer’s Association Safe Return
Program
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Resistance to Care
• Common in middle to late stages of dementia
• Major reason for institutionalization and use of psychotropic medications and restraints
• Management strategies– Restore calm– Time-out
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Food Refusal
• Occurs in each of the progressive stages of AD
• Causes• Management interventions
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Insomnia
• Insomnia noted months prior to AD diagnosis
• Establish routines to promote therapeutic sleep patterns– Establish sleep hygiene– Eliminate stimuli before bedtime
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Apathy and Agitation
• Associated with increasing cognitive decline
• Escalation can result in violence and combative behaviors
• Promote interest in the environment
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Pharmacological Interventions
• Used to promote comfort• Begin with lower dosages and gradually
increase• Monitor side effects closely
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Late Stage Issues
• Institutionalization• Do not resuscitate decisions• Transfer to acute care facilities • Feeding tubes• Infections
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Gerontological Nursing, Second EditionPatricia A. Tabloski
LEARNING OUTCOME 4Describe a contextual model to direct
behavioral and pharmacological interventions for behavioral symptoms of
Alzheimer’s disease.
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A Contextual Model for Symptom Management for AD
• Core = dementia + personality– Delusions – spatial disorientation = elopement
+ agitation– Hallucinations – functional impairment– Mood disorders – depression – anxiety +
inability to initiate meaningful activities – apathy + repetitive vocalization + agitation + insomnia
– Functional impairment – boredom – agitation
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A Contextual Model for Symptom Management for AD
• Processes at each level influence the next level
• Four quadrants direct symptom management– Caregiving environment– Social environment– Physical environment– Medical treatment
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Gerontological Nursing, Second EditionPatricia A. Tabloski
A Contextual Model for Symptom Management for AD
• Nurse-directed care– Approach focuses on prevention– Nurses provide and suggest behavioral
strategies– Add pharmacological interventions as last
resort
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LEARNING OUTCOME 5
Discuss Parkinson disease in terms of diagnosis, treatment strategies, and nursing
interventions.
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Parkinson Disease
• Cause– Loss of nerve cells– Decreased dopamine– Altered ratio of dopamine to acetylcholine – Exact cause unknown
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Risk Factors
• Aging• Equality noted between races and sexes• Genetics
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Diagnostic Testing
• No specific testing• Diagnosis made by excluding other
possibilities
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Characteristics of Parkinson Disease Stages
• Early stage– One-sided symptoms– Changes in posture, walking, and facial
expression• Middle stage
– Difficulty rising from sitting position– Maintain a flexed posture
• Late stage– Inability to stand or walk
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Pharmacological Therapies
• Sinemet• Anticholinergics• Amantadine• Dopamine agonists
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Surgical Management
• Unilateral posteroventral pallidotomy or thalamotomy
• Brain stimulation surgery• Transplantation of fetal midbrain
dopaminergic cells
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Nursing Care
• Promote mobility• Prevent falls• Preserve independence • Exercise
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LEARNING OUTCOME 6Define brain attack/stroke.
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Stroke
• Rapid onset• Loss of consciousness• Results from a lack of blood perfusion to
the brain
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Transient Ischemic Attack (TIA)
• Often called a “mini-stroke”• Causes no permanent damage• Increases risk of stroke in the future
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Causes of Strokes
• Hemorrhage into the brain• Embolus or thrombus that occludes an
artery• Rupture of an extracerebral artery
resulting in subarachnoid hemorrhage
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LEARNING OUTCOME 7Discuss brain attack/stroke in terms of high-risk older persons, treatment, and nursing
implications.
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Strokes
• A leading cause of death• 12:10,000 Americans will have a stroke
each year
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Strokes
• Risk factors– Hypertension– Smoking– Sedentary lifestyle– Obesity– Diabetes mellitus– Excessive alcohol consumption– Elevated cholesterol levels
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Gerontological Nursing, Second EditionPatricia A. Tabloski
Strokes
• Prevention– Balanced diet and weight loss– Exercise– Tight glycemic control– Reduction of high-risk behaviors– Carotid endarterectomy– Anticoagulant therapy
![Page 59: The Neurologic System](https://reader030.fdocuments.us/reader030/viewer/2022012919/56815d8c550346895dcb98bd/html5/thumbnails/59.jpg)
Copyright ©2010 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
Gerontological Nursing, Second EditionPatricia A. Tabloski
Strokes
• Treatment– Establish airway– Ventilation and oxygenation– Assess neurological status– Vital signs– Rehabilitation
![Page 60: The Neurologic System](https://reader030.fdocuments.us/reader030/viewer/2022012919/56815d8c550346895dcb98bd/html5/thumbnails/60.jpg)
Copyright ©2010 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
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Gerontological Nursing, Second EditionPatricia A. Tabloski
LEARNING OUTCOME 8Discuss nursing interventions for seizures.
![Page 61: The Neurologic System](https://reader030.fdocuments.us/reader030/viewer/2022012919/56815d8c550346895dcb98bd/html5/thumbnails/61.jpg)
Copyright ©2010 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
Gerontological Nursing, Second EditionPatricia A. Tabloski
Nursing Care of the Patient with Seizures
• Obtain medical history• Review history of seizures• Medication use• Patient-family education • Prevention of injury• Monitor for status epilepticus• Documentation
![Page 62: The Neurologic System](https://reader030.fdocuments.us/reader030/viewer/2022012919/56815d8c550346895dcb98bd/html5/thumbnails/62.jpg)
Copyright ©2010 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
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Gerontological Nursing, Second EditionPatricia A. Tabloski
LEARNING OUTCOME 9Discuss the difference between epilepsy and
seizures and nursing implications.
![Page 63: The Neurologic System](https://reader030.fdocuments.us/reader030/viewer/2022012919/56815d8c550346895dcb98bd/html5/thumbnails/63.jpg)
Copyright ©2010 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
Gerontological Nursing, Second EditionPatricia A. Tabloski
Seizure
• Abnormal, abrupt release of electrical activity in the brain
• Results in a variety of symptoms (spasticity, flaccidity)
• Manifestations based upon area of brain affected
![Page 64: The Neurologic System](https://reader030.fdocuments.us/reader030/viewer/2022012919/56815d8c550346895dcb98bd/html5/thumbnails/64.jpg)
Copyright ©2010 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458
All rights reserved.
Gerontological Nursing, Second EditionPatricia A. Tabloski
Epilepsy
• Two or more unprovoked seizures • Incidence increases with age
– People older than 75 twice as likely to develop new-onset epilepsy