Neuro Flashcards
In what trimester is the neuro system formed in utero?
1st trimester
Until what age are the number of glial cells and dendrites developing?
4yo
Until what age is the brain growing?
Puberty
In what direction does myelination occur?
Head to toe (cephalocaudal)
What are the primititve reflexes?
Rooting, Babinski, Moro, Palmar grasp, Fencing
What is the rooting reflex?
Babies turn face towards a stimulus and start rooting/sucking.
What is the Babinski reflex?
When foot is firmly stroked, toes flex outwards.
What is the Moro reflex?
When baby feels as if it is falling, extremities fan out.
What is the palmar grasp reflex?
When something is placed in newborn’s hand, baby will grasp that object.
What is the fencing reflex?
When a baby’s head is turned to one side, the arms and leg of that side are extended and the arms and legs of the opposite side are flexed.
When does the posterior fontanel close?
3mo
When does the anterior fontanel close?
18-24mo
What are possible causes of altered LOC?
Hypoxia, trauma, infection, poison, shunt malfunction, seizure, balance disturbances (endocrine, metabolic, electrolyte, acid/base), CNS disorders, structural defects
What is decorticate posturing?
A position that may indicated altered LOC d/t injury ABOVE brainstem, extremities brought to the “core” (brought in tight)
What is decerebrate posturing?
A position that indicates altered LOC d/t injury BELOW the brainstem, extremities splayed outwards.
What are the early s/s of increased ICP?
HA, visual changes, N/V, dizziness, pupils, sunsetting eyes, seizures, bulging fontanel
What are the three categories of the GCS?
Eyes, verbal, motor.
What is the most common neuro dysfunction in kids?
Seizures
What are idiopathic seizures?
Seizures with unknown cause (not epileptic)
What is the major cause of seizures in newborns?
Birth injury (anoxia) or congenital CNS defects
What is the major cause of seizures in infants?
Infection
What are absence seizures?
- AKA petit mal
- Brief loss of consciousness
- No change in muscle tone
- Onset @ 4-12yrs
- No aura
- Lasts 5-10sec
- S/s = lip smacking or twitching of eyes
- Minimal risk of falling
What are atonic seizures?
- Sudden loss of muscle tone
- Onset @ 2-5yrs
- Possible loss of consciousness
- Risk of falling (helmet worn often)
What are myoclonic seizures?
- Contractions of muscles
- No loss of consciousness
- Often occurs when falling asleep
- May be mistaken for exaggerated startle reflex (test if head can flex, if cannot, may be a myoclonic sz)
A child is wearing a helmet for seizures, what seizures are they most likely experiencing?
Atonic
What type of seizures occur most frequently when falling asleep?
Myoclonic
What are the 3 types of epilepsy?
Partial (focal) seizures, generalized, and ideopathic
At what age does epilepsy typically manifest?
5-6yrs
What is partial epilepsy?
- No loss of consciousness
- Sz lasts 30sec
- Sz occur at any time of day
- Motor responses involve =1 extremity
- Can progress to general
What is status epilepticus?
Acute sz that lasts >30min (despite medical intervention)
What steps are taken during status epilepticus?
- Maintain airway
- Check electrolytes, glucose, blood gases, temp, BP
- Administer meds
When can a bite block be used during a seizure?
If placed before seizure begins (during aura)