2. Purpose: To understand the workings and
functions of the human nervous system.
To successfully identify disease processes
common to the human nervous system.
To provide proficient care to individuals afflicted
with disease processes or injuries affecting the
human nervous system.
4. Neuron- The functional unit (cell) of the nervous
system that conducts electrical impulses to the
brain and to other areas of the body.
Sensory Neurons- Carry information from the
distal parts of the body toward the central
nervous system (CNS)
Motor Neurons- Carry motor information from
the CNS to the periphery.
5. Axon and dendrites branch off of the main body of
the neuron.
Axon- Carry impulses away from the cell body
Dendrites – Carry impulses to the cell body.
Myelin- is a substance that sheaths many axons and
dendrites. It enhances conduction along the nerve
fiber (moves impulse very quickly) and gives the
axons their white appearance.
6. The Central Nervous System (CNS)
Made up of the BRAIN and the SPINAL CORD
The Peripheral Nervous System (PNS)
Made up of all of the peripheral of the body,
including the spinal and cranial nerves
7.
8. The Brain is divided into the Cerebrum,
Cerebellum and the Brain Stem.
Cerebral Spinal Fluid (CSF) is composed of water,
glucose, sodium chloride and protein.
Its FUNCTION is that it acts as a shock absorber
for the brain and spinal cord.
9.
10. The Spinal Cord
Extends from C1 to L2
There are 31 pairs of spinal nerve roots that exit
the spinal cord, each consisting of an afferent root
(posterior sensory)and efferent root (anterior
motor).
These roots, along with the 12 cranial nerves
make up the PERIPHERAL NERVOUS SYSTEM.
11. Autonomic Nervous System
Controls the INVOLUNTARY activities of the
viscera including smooth muscle, cardiac muscle
and glands
Two major subdivisions: The SYMPATHETIC
NERVOUS SYSTEM (SNS) and the
PARASYMPATHETIC NERVOUS SYSTEM
(PNS).
12. Complex functions:
Initiation of movements, recognition of sensory
input, higher-order thinking, regulating
emotional behavior and endocrine and autonomic
functions
13. Divided into two halves: hemispheres
Each hemisphere controls the opposite side of the
body: the right hemisphere controls the left side
of the body, and the left hemisphere controls the
right side of the body
The cortex of each is divided into the parietal,
frontal, temporal, and occipital lobes; each has a
different area of function
14.
15. Brainstem
Includes midbrain, pons, medulla, and part of the
reticular activating system
Controls vital, basic functions, including
respiration, heart rate, and consciousness
16. Uses information received from the cerebrum,
muscles, joints, and inner ear to coordinate
movement, balance, and posture
Unlike the cerebrum, the right side of the
cerebellum controls the right side of the body,
and the left side of the cerebellum controls the left
side of the body
17. Carotid System
Begins as one common artery; later divides into the
external and internal carotid arteries
The external carotid arteries divide to supply blood to
the face
The internal arteries further divide into the middle
cerebral artery and the anterior cerebral artery to
supply blood to the brain
18. Carotid System
Begins as one common artery; later divides into the
external and internal carotid arteries
The external carotid arteries divide to supply blood to
the face
The internal arteries further divide into the middle
cerebral artery and the anterior cerebral artery to
supply blood to the brain
19. Vertebral Arteries
Originate from the subclavian artery, travel up
the anterior neck to merge and form the basilar
artery at the brainstem
Second division forms posterior cerebral artery
Internal carotid and vertebrobasilar arteries unite
to form the circle of Willis
20.
21. TYPES OF DISORDERS
Genetic/ Developmental
Trauma
Infection and Inflammation
Neoplasms
Degenerative processes
Vascular Disorders
Metabolic and Endocrine Disorders
22. Thought to be caused by:
Intracranial vasoconstriction followed be
vasodilation.
TRIGGERED BY:
Menstruation
Ovulation
Alcohol consumption
Some foods
STRESS
23. PAIN:
Usually unilateral
Often begins in the temple or eye area
VERY INTENSE
Tearing and nausea and vomiting may occur
Hypersensitivity to light and sound
25. Occur in a series of episodes followed by a long
period with no symptoms.
Intensely painful and seem to be related to stress
or anxiety.
Usually no warning symptoms.
27. Results from prolonged muscle contraction from
anxiety, stress, or stimuli from other sources, such
as brain tumor or an abscessed tooth.
Pain location may vary
May have N/V
Dizziness
Tinnitus
Tearing
28. TREATMENT
Correction of known causes
Psychotherapy
Massage
Heat application
Relaxation techniques
29. TREATMENT MEDICATIONS
Analgesics (usually non-opiod)
Benzodiazepines to relieve anxiety if severe.
30. Electrical impulses in the brain are conducted in a
highly chaotic pattern that yields abnormal
activity and behavior.
Related to trauma, reduced cerebral perfusion,
infection, electrolyte disturbances, poisoning, or
tumors.
32. Partial Seizure
Simple
Part of one cerebral hemisphere; consciousness not
impaired
Complex
Consciousness impaired; may exhibit bizarre
behavior
33. Generalized seizures
Involves the whole brain
Consciousness lost during the ictal (seizure) period
TYPES
Tonic-Clonic (Grand Mal)
Absence (Petit Mal) (Eye Blinking, Lip Smacking,
Daydreaming) generally identified in childhood.
Myoclonic (brief jerking or stiffening of extremities)
Atonic (Drop attacks) sudden loss of muscle tone
causes patient to collapse
34. Status Epilepticus
Medical emergency. The continuous seizure or
repeated seizure in rapid succession for 30 minutes
or more.
Aura
Dizziness, numbness, visual or hearing disturbance,
noting an offensive odor, or pain may precede a
seizure
35. MEDICAL TREATMENT
Resolution of the underlying condition
Anticonvulsant therapy
If good seizure control is not accomplished with one
drug, combinations of drugs may be prescribed.
37. Assessment
Describe the seizure episode, INCLUDING the post-
ictal period, and documenting drug therapy.
38. Risk for Injury:
Nursing Interventions
Side rails
Padded bed .
Suction machine
Bed in low position
Remove objects away from the patient
DO NOT attempt to restrain the patient
39. Ineffective Coping and Knowledge Deficit
Nursing Interventions
Teach family and patient about seizure disorder and
the therapy
Teaching must be directed toward helping the patient
and family adjust to a chronic condition
Encourage questions and concerns
40. TYPES
Scalp Injuries
Lacerations, contusions, abrasions, and hematomas
Concussion
Trauma with no visible injury to the skull or brain
Contusion
Bruising and bleeding in the brain tissue
41. TYPES
Hematoma
Subdural hematoma or epidural hematoma
Intracerebral Hemorrhage
From lesions within the tissue of the brain itself
Penetrating Injuries
Sharp objects penetrate the skull and brain tissue
43. Ineffective Tissue Perfusion
Ineffective Breathing Pattern
Risk for Injury
Risk for Infection
Impaired Physical Mobility
Disturbed Body Image
Ineffective Role Performance
44. Cause and Risk Factors
Some congenital; others may be related to heredity
Drug/environmental factors may play a role in
development
45. Signs and symptoms
Directly related to area of brain invaded by the
tumor
Visual disturbances and headache
New-onset seizure activity
Difficulties with balance and coordination
46. Medical Treatment
Surgery often followed by radiation with or without
chemotherapy
48. Cause and Risk Factors
Inflammation of the meningeal coverings of the
brain and spinal cord caused by either viruses or
bacteria
49. Signs and Symptoms
Headache,
nuchal rigidity (stiffness of the back of the neck)
irritability
diminished level of consciousness
photophobia (sensitivity to light)
hypersensitivity
seizure activity
Positive Kernig sign
Brudzinski sign
50.
51.
52. Medical Treatment
Bacterial infections usually respond to
antimicrobial therapy, but no specific drugs
effective against most viral infections
Anticonvulsants used to control seizure activity if
necessary
53. Assessment
Assess vital signs
Neurologic status frequently to determine
further deterioration or onset of
complications
55. Cause and Risk Factors
Inflammation of brain tissue caused by virus
Signs and Symptoms
Fever Agitation
Nuchal rigidity (stiff neck) Headache
Confusion Hemiparesis
Restlessness Exhibit aphasia
Delirium Facial weakness
Comatose
Other alterations in motor activity
56. Medical Treatment
Enhance patient comfort and increase strength
Because seizure activity is a potential problem,
take appropriate safety precautions
57. The nursing plan of care parallels that of the
patient with meningitis
58. Cause and Risk Factors
Although specific cause unknown, it is believed to
be an autoimmune response to a viral infection
Patients often report some recent viral infection or
vaccination
59. Initial Phase
Symmetric muscle weakness: begins in lower extremities;
ascends to trunk and upper extremities
Visual and hearing disturbances, difficulty chewing, and lack of
facial expression
Mild paresthesias or anesthesia in feet and hands in a glove or
stocking distribution pattern
Hypertension, orthostatic hypotension, cardiac dysrhythmias,
profuse sweating, paralytic ileus, and urinary retention
60. Plateau Phase
Remains essentially unchanged
No further neurologic deterioration, but no
improvement either
Recovery Phase
Remyelinization; muscle strength returns in a
proximal-to-distal pattern (head to toes)
61. Medical Diagnosis
Characteristic onset and pattern of ascending
motor involvement
Elevated protein level in the CSF
Nerve conduction velocity studies reveal slowed
conduction speed in the involved nerves
62. Medical Treatment
Preserve vital function, particularly respiration
Respiratory status is closely monitored and mechanical
ventilation initiated if vital capacity falls to 15 ml/kg of
body weight
Massive doses of corticosteroids prescribed to suppress
the inflammatory process
Plasmapheresis
63. Assessment
Health history describes the progression of
symptoms
Note fears, coping strategies, and sources of
support
Physical examination focuses on cranial nerve,
motor, respiratory, and cardiovascular function
64. Ineffective Breathing Pattern
Decreased Cardiac Output
Risk for Disuse Syndrome
Imbalanced Nutrition: Less Than Body
Requirements
Anxiety
Deficient Knowledge
Rehabilitation
65. Cause and Risk Factors
Progressive degenerative disorder of the basal
ganglia: an eventual loss of coordination and
control over involuntary motor movement
66. Signs and Symptoms
Tremor, rigidity, and bradykinesia
Loss of dexterity and power in affected limbs,
aching, monotone voice, handwriting changes,
drooling, lack of facial expression, rhythmic head
nodding, reduced blinking, and slumped posture
Depression common; dementia may develop
71. Assessment
Weakness, fatigue, muscle cramps, sweating,
dysphagia, constipation, difficulty voiding, and
unusual movements
Note lack of facial expression, eyes fixed in one
direction, drooling, slurred speech, tearing,
tremors, muscle stiffness, and poor balance and
coordination
72. Impaired Physical Mobility
Risk for Injury
Imbalanced Nutrition: Less Than Body
Requirements
Ineffective Coping
Deficient Knowledge
73. Cause
Chronic, progressive degenerative disease
Attacks the protective myelin sheath around axons and
disrupts the conduction of impulses through the CNS
Chronic, progressive MS: progresses steadily
Exacerbating-remitting MS: exacerbations and remissions
74. Signs and Symptoms
Fatigue, weakness, and tingling in one or more
extremities; visual disturbances; problems with
coordination; bowel and bladder dysfunction;
spasticity; and depression
75. Relapsing-progressive MS: less stable periods
than exacerbating-remitting
Stable MS: stable; no active disease for a year
Exact cause of MS is unknown; viral infections
and autoimmune processes have been implicated
76.
77. Medical Diagnosis
Based on the physical examination and history of
cyclic remission-exacerbation periods
Magnetic resonance imaging of the brain and
spinal cord may reveal plaques characteristic of
MS
79. Urinary retention treated with cholinergics, such
as bethanechol (Urecholine) or neostigmine
(Prostigmine)
80. Assessment
Onset and progression of symptoms, especially
those that affect mobility, vision, eating, and
elimination
Range of motion and strength, gait abnormalities,
tremors, and muscle spasms
82. Cause
Also known as Lou Gehrig’s disease; a
degenerative neurologic disease
Virus suspected, but exact cause unknown
83. Pathophysiology
Degeneration of the anterior horn cells and the
corticospinal tracts, so patient exhibits upper and
lower motor neuron symptoms
84. Signs and Symptoms
Weakness of voluntary muscles of the upper
extremities, particularly the hands
Difficulty swallowing and speaking
Eventually, respirations shallow; difficulty clearing
airway of pulmonary secretions
Death results from aspiration, respiratory infection,
or respiratory failure
88. Ineffective Airway Clearance
Impaired Physical Mobility
Imbalanced Nutrition: Less Than Body
Requirements
Impaired Verbal Communication
Impaired Skin Integrity
Anticipatory Grieving
Situational Low Self-Esteem
Interrupted Family Processes
89. Inherited degenerative neurologic disorder
Usually begins in middle adulthood with abnormal
movements, emotional disturbance, and intellectual
decline
Symptoms progress steadily: increasing disability and
death in 15 to 20 years
Medical and nursing care are supportive only; there is
no cure
90. Cause
May have an autoimmune basis
Pathophysiology
Insufficient receptor sites at the junction of the
motor nerve with the muscle
With repeated stimulation, muscle becomes
exhausted; eventually unable to contract at all
If respiratory muscles involved, death from
respiratory insufficiency or arrest possible
91. Signs and Symptoms
Weakness of voluntary muscles, particularly those
of chewing, swallowing, and speaking
Partial improvements of strength with rest
Dramatic improvement with the use of
anticholinesterase drugs
Ptosis and diplopia commonly seen
92. Medical Diagnosis
Administering edrophonium (Tensilon)
Muscle tone is markedly improved within 1
minute of injection; persists for 4 to 5 minutes
93. Medical Treatment
Anticholinesterase drugs
Neostigmine and pyridostigmine (Mestinon)
Corticosteroids
Cytotoxic therapies
Thymectomy
Plasmapheresis
94. Assessment
Health history describes the onset of symptoms:
muscle weakness, diplopia, dysphagia, slurred
speech, breathing difficulties, and loss of balance
96. Health History
Note speech, behavior, coordination, alertness,
comprehension
Chief Complaint and history of present
illness
Document what prompted the patient to seek
medical attention
Describe any injuries
If patient has pain, note the onset, severity,
location, and duration
97. Past Medical History
Head injury, seizures, diabetes mellitus,
hypertension, heart disease, and cancer
Record dates and types of immunizations
98. Family History
Have immediate family members had heart
disease, stroke, diabetes mellitus, cancer, seizure
disorders, muscular dystrophy, or Huntington
disease?
99. Review of Systems
Fatigue or weakness, headache, dizziness, vertigo,
changes in vision/hearing, tinnitus, drainage
from ears or nose, dysphagia, neck pain or
stiffness, vomiting, bladder or bowel function,
sexual dysfunction, fainting, blackouts, tremors,
paralysis, incoordination, numbness or tingling,
memory problems, mood changes
100. Functional Assessment
Document whether present symptoms interfere
with the patient’s usual activities and occupation
Explore sources of stress, usual coping strategies,
and sources of support
102. Risk Factors for Stroke
Non-modifiable factors
Risk factors that cannot be changed
Age, race, gender, and heredity
Modifiable factors
Those that can be eliminated or controlled
103. Temporary neurologic deficit caused by
impairment of cerebral blood flow
Blood vessels occluded by spasms, fragments of
plaque, or blood clots
Important warning signs for the individual
experiencing a full stroke
104. Signs and Symptoms
Dizziness, momentary confusion, loss of speech,
loss of balance, tinnitus, visual disturbances,
ptosis, dysarthria, dysphagia, drooping mouth,
weakness, and tingling or numbness on one side
of the body
105. Medical Diagnosis
Health history, physical examination findings,
and results of brain imaging studies
Laboratory studies, electrocardiography (ECG),
duplex ultrasonography, and cerebral
angiography
106. Medical Diagnosis
Health history, physical examination findings,
and results of brain imaging studies
Laboratory studies, electrocardiography (ECG),
duplex ultrasonography, and cerebral
angiography
107. Medical Treatment
Depends on the location of the narrowed vessel and the
degree of narrowing
Acetylsalicylic acid (aspirin)
Ticlopidine hydrochloride (Ticlid)
Extended-release dipyridamole (Aggrenox)
Clopidogrel bisulfate (Plavix) decrease platelet clumping
Warfarin (Coumadin) and heparin
Carotid endarterectomy and transluminal angioplasty
108.
109. An abrupt impairment of brain function resulting
in a set of neurologic signs and symptoms that are
caused by impaired blood flow to the brain and
last more than 24 hours
110. Pathophysiology
Hemorrhagic stroke
Blood vessel in brain ruptures; bleeding into the
brain occurs
Ischemic stroke
Obstruction of blood vessel by atherosclerotic
plaque, blood clot, or a combination of the two, or by
other debris released into vessel that impedes blood
flow to an area of the brain
111.
112. Signs and Symptoms
Different signs and symptoms, depending on the
type, location, and extent of brain injury
Hemorrhagic stroke
Occurs suddenly; may include severe headache
described as “the worst headache of my life”
Other symptoms: stiff neck, loss of consciousness,
vomiting, and seizures
113. Signs and Symptoms
Embolic stroke
Appear without warning
One or more of the following signs and symptoms:
one-sided weakness, numbness, visual problems,
confusion and memory lapses, headache, dysphagia,
and language problems
114. The number of nerve cells decreases
Brain weight is reduced; ventricles increase in size
Lipofuscin: aging pigment deposited in nerve cells
with amyloid, a type of protein
Increased plaques and tangled fibers in nerve tissue
Eye pupil often smaller; may respond to light more
slowly
115. Reflexes intact except for Achilles tendon jerk,
which is often absent
Reaction time increases, especially complex
reactions
Tremors in the head, face, and hands are common
Some develop dizziness and problems with
balance
116.
117. Signs and Symptoms
Aphasia
A defect in the use of language; speech, reading,
writing, or word comprehension
Dysarthria
The inability to speak clearly
Dysphagia
Swallowing difficulty
118. Signs and Symptoms
Dyspraxia
The partial inability to initiate
coordinated voluntary motor acts
Hemiplegia
Defined as paralysis of one side of the
body
119.
120. Signs and Symptoms
Sensory impairment
Unable to feel touch, pain, or
temperature in affected body parts
Unilateral neglect
Do not recognize one side of the body
as belonging to them
121. Signs and Symptoms
Homonymous hemianopsia
Perceptual problem: involves loss of one side of field
of vision
Elimination disturbances
Neurogenic bladder
Flaccid bladder
Bowel incontinence
122. Medical Diagnosis
Blood studies, electrocardiogram (ECG),
computed tomography, magnetic resonance
imaging, carotid ultrasound studies, cerebral and
carotid angiography, electrocardiography,
positron-emission tomography, and
single-photon emission computed tomography
123. Complications
Constipation, dehydration, contractures, urinary tract
infections, thrombophlebitis, decubitus ulcers, and
pneumonia
Sensory losses put patient at risk for traumatic and
thermal injuries
Swallowing difficulties place patient at risk for
pulmonary complications, such as choking and
aspiration pneumonia
124. Prognosis
Prognosis for TIA or stroke increasingly
hopeful
Critical variables for recovery: patient’s
condition before the stroke, time between
stroke and diagnosis, treatment and support
in acute phase (usually the first 48 hours),
severity of patient’s symptoms, and access to
rehabilitative therapy
125. Prognosis
Long-term recovery may depend on the care
received immediately after the stroke
Most recovery takes place in the first 3 to 6
months, but progress often continues long after
that
126. Medical Treatment in the Acute Phase
Begins with the onset of signs and symptoms and
continues until vital signs, particularly blood pressure
and neurologic condition, stabilize
This phase usually lasts 24 to 48 hours
Many medical management interventions are directed
at minimizing complications and deterioration of the
patient’s condition after a stroke
127. Medical Treatment in the Acute Phase
Major focus areas
Hypertension
Oxygenation
Hyperthermia
Hyperglycemia
Drug therapy
Tissue plasminogen activator (rt-PA, alteplase,
Activase)
Given to dissolve clots in acute ischemic strokes
128. Medical Treatment in the Acute Phase
Other Medications
Mannitol
Nimodipine (Nimotop)
Phenytoin (Dilantin) and phenobarbital
Acetylsalicylic acid (aspirin), ticlopidine
hydrochloride (Ticlid), Aggrenox, and
clopidogrel (Plavix)
129. Medical Treatment in the Acute Phase
Surgical intervention
An option for some patients with hemorrhagic
strokes
Decisions about surgery are based on patient’s
age, intracranial pressure, and location of the
hemorrhage
130. Medical Treatment in the Acute Phase
Fluids and Nutrition
Intravenous fluids
Dietary order based on patient’s
nutritional requirements and ability to eat
Regular, soft, or pureed
Total parenteral nutrition may be ordered
for the malnourished patient
131. Medical Treatment in the Acute Phase
Urine Elimination
Indwelling catheter to manage urinary incontinence
Intermittent catheterization: controlling incontinence
caused by a flaccid bladder
132. Assessment
Evaluate type and extent of the stroke: time of
onset, symptoms, other details
Cincinnati Pre-hospital Stroke Scale
133. Health History
Chief complaint and history of present illness
Medical history
Family history
Review of systems
Functional assessment
134. Physical Examination
Assess patient’s general appearance,
responsiveness, and behavior
Record restlessness or agitation
Measure vital signs; weight and height if possible
135. Physical Examination
Inspect the face for symmetry; mouth for
moisture and drooling
Evaluate the alert patient’s ability to swallow
Inspect pupils for size, equality, and reaction to
light
136. Physical Examination
Conduct a gross vision assessment
Inspect skin color and palpate for moisture and turgor
Assess extremities for muscle tone and strength, sensation, and
voluntary movement
Record evidence of incontinence or bladder distention
Frequently repeat neurologic checks: evaluating level of
consciousness, pupil appearance and response to light, the patient’s
ability to follow commands, and the movement and sensation of
extremities
137. Ineffective Airway Clearance and Ineffective
Breathing Patterns
Risk for Injury
Deficient Fluid Volume or Excess Fluid Volume
Imbalanced Nutrition
Disturbed Sensory Perception
Ineffective Thermoregulation
Disturbed Thought Processes
138. Impaired Verbal Communication
Impaired Physical Mobility
Total or Functional Urinary Incontinence
Constipation and/or Bowel Incontinence
Ineffective Coping
Interrupted Family Processes
140. Rehabilitation Phase
Self-Care Deficit
Risk for Injury
Ineffective Coping
Impaired Verbal Communication
Imbalanced Nutrition
Impaired Physical Mobility
Constipation
Total and Functional Urinary Incontinence
141.
142.
143.
144. Patients may be discharged to home or go to
specialized rehabilitation centers for continued
therapy
Outpatient therapy is an option for some patients
When able, patients are transitioned back into the
home setting
Essential to include family, friends, and significant
others in this process
145. During and after the rehabilitation phase,
patients and families need to be made aware of
resources to help them deal with continuing
disabilities
In rehabilitation, the patient is respectfully
challenged to return to the highest level of
function possible
146. Anatomy and Physiology
Consists of 33 vertebrae
7 cervical (C1 through C7)
12 thoracic (T1 through T12)
5 lumbar (L1 through L5)
5 sacral (S1 through S5)
4 fused coccygeal