Neurological System (Exam One) Flashcards
What are the two divisions of the nervous system?
- Central Nervous System
- Peripheral Nervous System
What is included in the central nervous system?
- Brain
- Spinal cord
What is included in the peripheral nervous system?
Includes the autonomic nervous system (ANS)
What is nerve tissue comprised of?
- Neurons
- Support cells
List the six different parts of a neuron.
- Soma
- Dendrites
- Axon
- Myelin Sheath
- Nodes of Ranvier
- Synaptic Knob
What part of the neuron is considered the control center?
Soma (cell body)
What part of the neuron contains the nucleus?
Soma (cell body)
What part of the neuron receives transmissions and sends out impulses to other cells in the body?
Dendrites
What part of the neuron carries nerve signals away from the soma?
Axon
What part of the neuron encases the axon and increases and conducts speed?
Myelin sheath
What are the gaps in between the myelin sheath called?
Nodes of Ranvier
What is present at the end of axon branches?
Synaptic knob
What do synaptic knobs contain?
A neurotransmitter
What are the different types of neurons?
- Sensory
- Motor
- Interneurons
Sensory neurons are responsible for what?
- Detecting stimuli
- Sending information about the stimuli to the CNS
Motor neurons are responsible for what?
Relay messages from the brain to the body so the muscle or gland can respond to the stimulus
What do the interneurons do?
Connect the incoming sensory messages with the outgoing motor messages
What is a nerve?
Group of axons and blood vessels wrapped in connective tissue
Most nerves are _____.
Mixed
Where is the spinal cord located?
In the vertebral column
List the components of the spinal cord.
- White matter
- Gray matter
- Epidural space
- Subarachnoid space
- Central canal
- Anterior horn
- Posterior horn
List the vertebral column or spinal nerves.
- Cervical
- Thoracic
- Lumbar
- Sacral
- Coccygeal
How many cervical nerves are there?
8
How many thoracic nerves are there?
12
How many lumbar nerves are there?
5
How many sacral nerves are there?
5
How many coccygeal nerves are there?
1
Are reflexes voluntary or involuntary movements?
Involuntary movements
What is the largest portion of the brain?
Cerebrum
What is the second largest portion of the brain?
Cerebellum
What does the brainstem consist of?
- Midbrain
- Pons
- Medulla oblongata
What are meninges?
Three layers of connective tissue that cover the central nervous system
What is the function of the cerebral spinal fluid?
- Permits exchange of waste and nutrients between blood and neurons
- Shock absorber
What is the primary reflex center?
Midbrain
What is the primary respiratory center?
Pons
The medulla is responsible for what? Give examples.
-Responsible for vital life functions
- Heart rate
- Blood pressure
The cerebellum is responsible for what?
- Coordination
- Posture
- Balance
What does the hypothalamus control?
Thermoregulation or body temperature
The anterior hypothalamus controls heat _____. Give examples of how this mechanism is carried out within the body.
Heat loss
- Sweating
- Vasodilation
The posterior hypothalamus controls heat _____. Give examples of how this mechanism is carried out within the body.
Heat production
- Vasoconstriction
- Muscle contraction and shivering
List the four different lobes of the brain.
- Frontal lobe
- Temporal lobe
- Occipital lobe
- Parietal lobe
What is the name of cranial nerve I?
Olfactory
What is the name of cranial nerve II?
Optic
What is the name of cranial nerve III?
Oculomotor
What is the name of cranial nerve IV?
Trochlear
What is the name of cranial nerve V?
Trigeminal
What is the name of cranial nerve VI?
Abducens
What is the name of cranial nerve VII?
Facial
What is the name of cranial nerve VIII?
Vestibulocochlear
What is the name of cranial nerve IX?
Glossopharyngeal
What is the name of cranial nerve X?
Vagus
What is the name of cranial nerve XI?
Accessory
What is the name of cranial nerve XII?
Hypoglossal
What are the two divisions of the autonomic nervous system (ANS)?
- Sympathetic Nervous System
- Parasympathetic Nervous System
The sympathetic nervous system is also known as what?
Fight-or-flight
The parasympathetic nervous system is also known as what?
Rest-or-digest
What neurotransmitters are in the sympathetic nervous system?
- Acetylcholine
- Norepinephrine
Are extreme forgetfulness and confusion a normal part of aging?
No
Decreased blood flow to brain because of aging causes what?
- Increased syncope
- Decreased mental function
In relation to aging, the deposition of aging pigment lipofuscin in nerve cells and amyloid in blood vessels causes what?
Impairment in cognition, reasoning, judgement, and orientation
Decreased norepinephrine due to aging results in what?
Altered sleep patterns
Decreased acetylcholine and progressive loss of dendrites due to aging causes what?
Impaired short-term memory
A decrease in dopamine due to aging causes what?
- Decreased motor function
- More accidents and falls
Decreased postural stability due to aging leads to what?
More accidents and falls
Describe Babinski’s sign. List a normal and abnormal sign.
- Firmly stroking sole of foot
- Normal response is flexion of the great toe
- Abnormal if the great toe extends and the other toes fan out (patient >6 months old)
Describe Romberg’s test.
- Patient stands feet together and eyes closed
- Patient will have minimal swaying in a negative Romberg test
- A patient who sways or leans to one side has a positive Romberg test
When is Romberg’s test often utilized?
In concussion patients
Why is the Glasgow Coma Scale used?
Used to assess the patients level of consciousness
Using the Glasgow Coma scale, at what score is the patient considered comatose?
7
Using the Glasgow Coma scale, at what score is the patient considered severe?
8 and below
A Glasgow Coma scale score of 15 indicates what?
Patient is fully alert and oriented
What is decorticate posturing? What does this indicate?
- Flexion of body
- Indicates significant cerebral impairment
What is decerebrate posturing? What does this indicate?
- Extension of body
- Indicates brainstem damage
FOUR Score Coma Scale assesses patients who are in what type of state?
Comatose state
What four components are assessed during the FOUR Score Coma scale?
- Eye responses
- Motor responses
- Brainstem reflexes
- Respirations
What is anisocoria?
Pupils are unequal in size
What is nystagmus? What type of nystagmus is most common?
- Involuntary eye movement
- Horizontal nystagmus
Why is B12 assessed as a neurological diagnostic test?
To rule out fatigue or tiredness
Why are hormone levels assessed as a neurological diagnostic test?
To identify problems in the pituitary gland or hypothalamus
Why are liver and kidney function assessed as a neurological diagnostic test?
Problems with the brainstem
A lumbar puncture is most commonly used to assess what disease?
Meningitis
What nursing management should be provided to a post-operative lumbar puncture patient?
- Maintain flat bedrest for 6 to 8 hours
- Encourage fluids
- Monitor puncture site
- Monitor movement, sensation, headache
Why should a post-operative patient be kept on flat bedrest for 6 to 8 hours following a lumbar puncture?
Prevent spinal headache
What must the nurse assess before obtaining a CT scan with contrast dye?
Assess for shellfish allergy
What must the nurse assess before obtaining an MRI?
- Presence of pacemaker
- Metal within the body
- *Absolutely NO metal can enter the machine**
What must the nurse assess before obtaining a myelogram with contrast dye?
- Assess for shellfish allergy
- Assess for history of seizures
What does an electroencephalogram (EEG) assess?
Seizure activity
What is meningitis? Is it bacterial or viral?
- Infection or inflammation of the brain and spinal cord
- Can be either bacterial or viral
Is viral or bacterial meningitis more common? Is it considered a serious disease?
- Viral meningitis (enterovirus)
- Rarely considered serious
When can brain damage occur with bacterial meningitis?
With the onset of a fever
Bacterial meningitis can kill an individual within _____ hours.
24
What are the signs and symptoms of meningitis?
- Severe headache
- Nuchal Rigidity
- Positive Kernig’s sign
- Positive Brudzinski’s sign
What is the LPN/RN’s responsibility when a lumbar puncture is performed?
Hold the patient in position
Why might codeine products be contraindicated in a patient with meningitis?
Codeine may impair neurological assessment
What precaution is in place for 24 hours after antibiotics have been administered to a patient with bacterial meningitis?
Droplet isolation
What is encephalitis? What might it cause?
- Inflammation of brain tissue
- Cause increased intracranial pressure
- Cause possible herniation of the brain
What is the most common cause of encephalitis?
Viruses
What particular virus is related to encephalitis? Who will this virus most negatively affect?
- West nile virus
- Affects infants and children
How would the fontanel look in a child who has encephalitis?
Bulging fontanel
Increased intracranial pressure results from an increase in what three components?
- Brain
- Blood
- Cerebrospinal fluid
What is a classic late sign of increased intracranial pressure?
Cushing’s Triad
What results if Cushing’s Triad is present?
- Increased systolic blood pressure
- Decreased heart rate
- Decreased respirations
What are the early signs of increased intracranial pressure?
- Decreased LOC
- Confusion
- Slurred speech
What measures prevent increased intracranial pressure?
- HOB at 30 degrees
- Avoid neck and hip flexion
- Prevent strenuous activities
- Promote rest
List examples of a primary headache.
- Migraine
- Tension
- Cluster
What is a secondary headache?
Caused by trauma, infection, or other disease
What education should be provided to a patient who has headaches or seizures?
Keep a diary with trigger, timing, symptoms
What are the two classifications of seizures?
- Partial
- Generalized
What is involved in a partial seizure?
- Involves one side of the cerebral cortex
- Can become generalized
What is involved in a generalized seizure?
Involves both sides of the cerebral cortex
What is an aura? When does this occur?
- Visual distortion
- Odor
- Sound
- Occurs right before a seizure
How long are partial seizures?
Usually < 1 minute
How long are complex partial seizures? Will the patient lose consciousness
- 2 to 15 minutes
- Yes
What are the signs and symptoms of absence or petit mal seizures?
Staring
What can an electroencephalogram (EEG) tell the nurse about seizure activity?
- Where seizure starts
- Frequency
- Duration
- Presence of asymptomatic seizures
The nurse knows they should not restrain a seizure patient because?
It can cause injury to the patient or the nurse
What is the priority nursing care for a patient who is actively having a seizure?
- Monitor and maintain airway
- Suction and oxygen
- Observe and document
Status epilepticus is considered what?
EMERGENCY!
What causes status epilepticus?
Abruptly stopping anti-seizure medication
What is the most common cause of traumatic brain injuries?
Motor vehicle accident
Describe the acceleration mechanism of injury.
Moving object strikes a stationary head
Describe the deceleration mechanism of injury.
Moving head strikes a stationary object
Describe the acceleration-deceleration mechanism of injury.
A mobile object strikes a stationary head and then the head strikes a stationary object
Describe the rotational mechanism of injury.
- Shifting/shearing of the head
- Results from direct blow
- Results from vehicle getting hit from the side
Twisting of the brainstem can cause what?
Loss of consciousness
Where does a subdural hematoma occur?
Between the dura and arachnoid space
Where does an epidural hematoma occur?
Between the dura and the skull
If the patient presents with a hematoma, the nurse knows they need to do what? Why?
- Be prepared to prep the patient for a craniotomy
- To relieve intracranial pressure
What is post-concussion syndrome?
- When the symptoms of a concussion exceed three weeks
- May last up to 12 months
Patients who are ______ with a suspected concussion will require an immediate _______.
- Vomiting
- CT scan
What is paresthesias?
Feeling of pins and needles
What is autonomic dysreflexia? When will autonomic dysreflexia occur?
- Complication of a spinal injury
- When injury is above T6
- Life threatening
- Impairs equilibrium between SNS and PNS
What is the priority vital sign that the nurse will monitor in a patient with a spinal cord injury? How often is it evaluated?
- Blood pressure
- Every five minutes
What factors might cause the blood pressure to rise in a patient with a spinal cord injury?
- Full bladder
- Constipation
- Pressure sores
- Improper positioning
When is it safe for the nurse to remove a c-collar?
- IT IS NOT!
- Can only be done with a physicians order
Why is logrolling performed on a patient for a spinal cord injury?
To maintain body alignment
What does a neurodegenerative disorder cause?
Degeneration, or wasting, of the neurons
What does a neurocognitive disorder cause?
Cognitive decline
What is the priority nursing intervention for a dementia patient?
Prolong a good quality of life
What is the primary nursing diagnosis for dementia patients?
Risk for injury
What is delirium?
Temporary mental disturbance
Is delirium considered a medical emergency?
Yes
What are the signs and symptoms of delirium?
- Disorganized thinking
- Difficulty staying focused
What is the primary cause of Parkinson’s disease?
Decreased dopamine production
What are the signs and symptoms of Parkinson’s disease?
- Shuffling gait
- Pill-rolling tremor
- Difficulty swallowing
- Muscular rigidity
- Bradykinesia
What might the nurse instruct a Parkinson’s patient to do in order to initiate movement?
Rock from side-to-side
What is Huntington’s disease?
Progressive degeneration of parts of the brain
Huntington’s disease is ________.
Incurable
What are the signs and symptoms of Huntington’s disease?
- Dementia
- Depression
- Dysphagia
- Death
What nursing care should be provided to a patient with Huntington’s disease?
- Palliative care
- Prolong a good quality of life
What is Alzheimer’s disease?
Progressive, degenerative disease
What is the priority nursing diagnosis for a patient with Alzheimer’s disease?
Risk for injury
Describe Stage One of Alzheimer’s disease.
- 2 to 4 years
- Increased forgetfulness
Describe Stage Two of Alzheimer’s disease.
- 2 to 12 years
- Progressive memory loss
- Depression
- Aphasia
- Sleep disturbances
- Hallucinations
- Seizures
Describe Stage Three of Alzheimer’s disease.
- Complete dependency
- Loss of bowel/bladder control
- Loss of emotional control
- Inability to recognize significant family members
- Death
What is a transient ischemic attack (TIA)?
Temporarily blocks circulation from going through the brain
A transient ischemic attack (TIA) is a forewarning for what condition?
Stroke
Transient ischemic attacks (TIA) deprive the brain of what substances?
- Glucose
- Oxygen
What is a stroke? What does a stroke cause within the brain?
- Disruption of blood flow to the brain
- Results in dead brain cells
What are the modifiable risk factors of a stroke?
- Hypertension
- Smoking
- TIA
- Diabetes
What are the warning signs of a stroke?
- Sudden numbness or weakness
- Sudden confusion
- Sudden change in vision
- Sudden dizziness/trouble walking
- Sudden severe headache
What is the acronym for a stroke?
F: ace
A: rms
S: peech
T: ime (call 911)
What is expressive aphasia?
Patients knows what they want to say but have trouble saying or writing it
What is receptive aphasia?
Patient is able to hear or see words but cannot make sense of the words
If the patient has a left-sided infarction, which side of the body will be impaired?
Right side
If the patient has a right-sided infarction, which side of the body will be impaired?
Left side
Will a CT scan initially show a stroke?
No
Following an ischemic stroke, thrombolytic therapy must be given within how many hours?
4.5 hours
What question does the nurse need to ask while collecting the history of a patient who is experiencing symptoms of a TIA?
How long have the symptoms been going on?
What are the priority nursing diagnosis with cerebrovascular accidents?
- Safety
- Decrease in sensation
- Impaired skin integrity
What is an aneurysm?
Weakness in the artery wall
What are the signs and symptoms of a cerebral aneurysm or subarachnoid hemorrhage?
- Severe headache
- Photophobia
- Vomiting
- Disorientation
- IICP
- Changes in LOC
- Nuchal Rigidity
- Pupil changes
Which cranial nerves are most commonly affected in a cerebral aneurysm or subarachnoid hemorrhage?
Cranial nerve III (3)
Cranial nerve VI (6)
What are the complications of a cerebral aneurysm or subarachnoid hemorrhage?
- Rebleed
- Hydrocephalus
- Vasospasm
Picture boards are utilized in patients who have what?
Expressive aphasia
What is the function of cranial nerve I?
Sense of smell
What is the function of cranial nerve II?
Sense of sight
What is the function of cranial nerve III?
- Eyeball movement
- Pupil constriction
What is the function of cranial nerve IV?
Eyeball movement
What is the function of cranial nerve V?
- Sensation in face, scalp, teeth
- Chewing
What is the function of cranial nerve VI?
Eyeball movement
What is the function of cranial nerve VII?
- Taste
- Contraction of facial muscles
- Saliva secretion
What is the function of cranial nerve VIII?
- Sense of hearing
- Sense of equilibrium
What is the function of cranial nerve IX?
- Taste
- Saliva secretion
- Swallowing
- Sensory input for cardiac, respiratory and blood pressure reflexes
What is the function of cranial nerve X?
- Sensory input for cardiac, respiratory and blood pressure reflexes
- Sensory for speech
- Decreased heart rate
- Swallowing
- Peristalsis
- Increased digestive secretions
What is the function of cranial nerve XI?
- Contraction of neck and shoulder muscles
- Speech
What is the function of cranial nerve XII?
Movement of the tongue
What is multiple sclerosis?
Degeneration of myelin sheath and destruction of nerve fibers
What education should be provided to a patient with multiple sclerosis?
Fatigue will be increased in a hot environment
What are the signs and symptoms of multiple sclerosis?
- Muscle weakness
- Numbness
- Fatigue
- Vertigo
- Dysphagia
- Bowel/bladder problem (UTI)
What might cause exacerbations of multiple sclerosis?
- Stress
- Illness
- Hot environment
- Urinary tract infection
What occurs within the body of a patient who has myasthenia gravis?
Immune system destroys acetylcholine on the muscle receptors and becomes unable to stimulate muscle contraction
What are the signs and symptoms of myasthenia gravis?
- Progressive muscle weakness
- Fatigue with activity
- Ptosis
- Difficulty chewing, swallowing
- Difficulty breathing
What is a myasthenic crisis?
Sudden onset of muscle weakness
What is a cholinergic crisis?
- Overmedication with anticholinesterase drugs
- Not administering correctly
- Administering too much
What is a Tensilon test?
Injection of IV anticholinesterase drug to see if muscle weakness improves
Does ALS or Lou Gehrig’s disease affect involuntary or voluntary muscle movement?
Voluntary
What are an EEG, nerve biopsy, and EMG used when diagnosing ALS or Lou Gehrig’s disease?
To rule out other illnesses
What patient education should be provided to a patient with ALS or Lou Gehrig’s disease?
- Support groups
- Importance of avoiding infection
- Teach family to provide care
How can the nurse facilitate the expulsion of sputum in an ALS patient with pneumonia?
Suction at bedside
What is Guillain-Barre syndrome?
Inflammation of the spinal and cranial nerves
In Guillain-Barre syndrome, demyelination occurs in what type of pattern? Where does this begin?
- Ascending pattern
- In the legs
In Guillain-Barre syndrome, remyelination occurs in what type of pattern?
Descending pattern
Describe Stage One of Guillain-Barre syndrome?
- Hours to 3 weeks
- Abrupt onset of weakness and paralysis
- Respirations are affected
- Autonomic nervous system is affected
Describe Stage Two of Guillain-Barre syndrome?
- 2 to 14 days
- Plateau
- Progression stopped
Describe Stage Three of Guillain-Barre syndrome?
- 6 to 24 months
- Recovery
What is the most important assessment with a new onset of Guillain-Barre syndrome?
Respiratory assessment
What should be kept at the bedside of a patient with Guillain-Barre syndrome?
- Oxygen
- Intubation
- Suction
How long can post-polio syndrome affect polio victims?
10 to 40 years later
List the nursing diagnosis for patients with neuromuscular disorders.
- Ineffective airway clearance
- Impaired physical mobility
- Risk for imbalanced nutrition
- Impaired verbal communication
What is trigeminal neuralgia?
Irritation of the trigeminal nerve (cranial nerve V)
What portion of the nerve is affected with trigeminal neuralgia?
Sensory portion
What is Bell’s palsy?
Inflammation and edema of the facial nerve
What function of the nerve is affected with Bell’s palsy?
Motor function
What are the signs and symptoms of Bell’s palsy?
- One sided facial drooping
- Weakness
- Difficulty with speech/chewing
- Forehead not wrinkled
A patient with trigeminal neuralgia will experience what?
Pain
A patient with Bell’s palsy will experience what?
Paralysis
What percent of developmental delays occur in children within the United States?
17%
What percent of children with a developmental delay will be diagnosed by school-age?
50%
Once a milestone is missed, children _______ catch up _____.
DO NOT catch up QUICKLY
When is spina bifida present in an infant?
At birth
What is consumed during pregnancy to prevent neural tube defects?
Folic Acid
How much folic acid should be consumed during pregnancy?
At least 400 mg
What are the different types of spina bifida?
- Myelomeningocele
- Meningocele
- Spina Bifida occulta
Which form of spina bifida is most common?
Myelomeningocele
What occurs during myelomeningocele?
Spinal cord and nerves are exposed and visible on the outside of the body
Myelomeningocele will result in what?
Partial or complete paralysis
What is spina bifida occulta?
- Section of spinal vertebrae is malformed
- Cord and nerves are normal
- Tuft of hair may be only visible physical indication
Does spina bifida occulta cause bowel and bladder problems or paralysis?
No
What is involved in the protection of open spinal cord defects?
- Must be covered and protected
- Aseptic technique
- Sterile dressing moistened with warn sterile saline
- Position prone and lying on open diaper
What is name of the neural tube defect where most of the brain does not develop?
Anencephaly
What is encephalocele?
Portion of the brain protrudes through an opening in the skull
What are the common locations of an encephalocele?
- Groove in the middle of the skull
- Between the forehead and nose
- On the back side of the skull
What is chiari malformation?
Structural defect of the cerebellum
What are the signs and symptoms of type one chiari malformation? How is this diagnosed
- No signs and symptoms
- Diagnosed through accidental finding
When do congenital malformations occur?
During fetal development
What is the most common brain malformation?
Agenesis of Corpus Callosum
This condition is also known as “smooth brain”.
Lissencephaly
Lissencephaly causes what?
Severe neurological impairment
Microencephaly is present if what?
The circumference of the head is more than two standard deviations below normal
What is schizencephaly?
Abnormal slit or cleft in the hemisphere(s) of the brain
What will result if schizencephaly is in both hemispheres?
- Developmental delays
- Paralysis
What will result if schizencephaly is in one hemispheres?
Paralysis on one side
Premature closing of skull sutures is known as what?
Craniosynostosis
What is craniosynostosis associated with?
Facial deformities
Closing of the skull sutures is considered to be premature if closure occurs before what age?
Two months old
What is congenital hydrocephalus?
Blockage occurs before birth
What is acquired hydrocephalus?
Blockage occurs after birth
What are the signs and symptoms of hydrocephalus symptoms?
- Large head
- Rapid increase in head circumference
- Bulging fontanel
- High-shrill
- Sunsetting eyes
- Opisthotonos
What is the treatment option for hydrocephalus?
Ventriculoperitoneal shunt
What risk is associated with a shunt?
Infection
What is the most important factor when diagnosing sleep disorders in children?
Thorough sleep history
What are the treatment options for sleep disorders in children?
- Good sleep habits
- No hypnotic sleep aids
- Safety measures for sleepwalking
What causes febriel seizures?
- Body temperature accelerated or decreased too rapidly
- Body is unable to adjust
List safety promotion for seizure prevention.
- Helmet/protective gear
- Bathe with supervision
- No swimming without supervision
- No sleeping on high bed
At what age are febrile seizures most common? In what gender are they most common?
- 3 months to 5 years
- Common in boys
When are infantile spasms most likely to occur?
- Upon awakening
- Going to sleep
What type of syncope is most common?
Vasovagal syncope
What is a common sign of Type 1 neurofibromatosis?
Cafe-au-lait spots
Can infants have strokes in utero?
Yes
What is the most common cause of pediatric strokes?
Neonatal hemorrhages
What are the signs and symptoms of congenital zika syndrome?
- Severe microcephaly
- Congenital contractures
- Hypertonia
What are the causes of cerebral palsy in children?
- Premature birth
- Very low birth weight
What type of cerebral palsy is the most common?
Spastic
What is cerebral palsy?
Chronic disability impairing muscle movement and posture
Describe the signs and symptoms of spastic cerebral palsy?
- Stiffness in legs
- Occurs on one side of body or quadriplegia
Describe the signs and symptoms of athetoid/dyskinetic cerebral palsy?
- Sudden, uncontrollable changes in muscle tone
- Difficulty controlling movements
Describe the signs and symptoms of ataxic cerebral palsy?
- Problems with balance/coordination
- Problems with writing/reaching for objects
Describe the signs and symptoms of mixed cerebral palsy?
Some have more than one type
Few spontaneous movements is associated with what pediatric disease?
Spinal muscle atrophy one (SMA1) (Werdnig-Hoffman disease)