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27 Cards in this Set
- Front
- Back
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What is and EEG good for?
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It gives good regional infor on the brain. It is able to localize discrepancies in lobes
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What is a Hz?
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number of cycles/sec
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4 types of brain waves?and jobs?
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Alpha - (Awake/resting)
Beta - (Busy) Theta - (Stress) Delta - (Deep sleep) |
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What creates an EEG?
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Cortical EPSP and IPSPs
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Types of EEG diagnoses
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Good for differential diagnoses
Bad for Causative(etiological) |
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What's epilepsy?
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The most common neuro disorder, characterized by recurrent seizures
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What is postictal period?
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Immediately after a seizure where the patient is physically and mentally exhausted
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The ictal period is what?
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The actual seizure
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Status epilepticus?
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Continuous seizures or clusters of seizures
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What are generalized seizures?
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They affect both hemispheres of the brain
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What is a tonic/clonic seizure?
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The grand mal. With tonic stiffening of the limbs and clonic jerking.
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Whats the post ictal stupor?
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Where very little brain activity is occuring
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What is a myoclonic jerk?
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Drift off to sleep and you jerk
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What is a myoclonic seizure?
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Rapid, brief contraction of body muscles(generalized)
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What is an absence seizure(generalized)?
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Petit mal, looks like complete lack of awareness. Less than one minute
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What is an Atonic seizure? generalized
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Abrupt loss of muscle tone(A kid drops)
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What is a coup injury? and a contra coup?
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1.Head injury where brain is bruised at the impact site.
2. head injury on opposite side where head smacked into |
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Partial Seizures
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Limited to one region of the body.
No loss of conciousness for simple, lost in complex |
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Non epileptic related seizures(4)
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First time, febrile, eclampsia(preggers) , pseudo
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Etiology of Seizures(3)
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1. NT imbalance(low GABA)
2. Brain trauma/Dz 3. Environmental |
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What happens to the brain during a seizure? Common areas? Preceded?
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1. Over excitable neurons spread their activity
2. Motor and Temporal lobes often the POI 3. Temporal lobe seizures often preceded by auras |
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Tx of seizures(5)
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1. Anticonvulsants
2. Surgical removal of focal area 3. Diet restrictions 4. Vagal nerve stimulation 5. Location device in chest wall |
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SCN in the hypothalamus does what?
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Circadian rythms
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Adenosine relates to sleep how?
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It builds up over the day and makes you tired
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Serotonin relates to sleep?
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1.Produced in the raphe of the RF
2. depletion can result in insomnia |
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ARAS and sleep?(4)
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1. Sleep/wake RF high command
2. Midbrain ARAS drives cortex 3. Pontine ARAS shuts cortex off 4. This is why compression of the midbrain can cause you to fall asleep(coma) |
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Coffee and Tea act where?
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The A1 receptor of ACh neurons
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