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Pathophysiology - Neuropathophysiology 2 (PPT 5)
Fall Semester - 2010
83
Medical
Graduate
11/04/2010

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Term
What are the signs of UMN Defects?
Definition
Spastic Weakness
Hyperreflexia
Babinski Reflex may be present
Term
What are the signs of LMN Defects?
Definition
flaccid weakness
significant atrophy
fasciculations present
hyporeflexia
Term
Can peripheral nerves regenerate?
Definition
peripheral nerves can regenerate
Term
What are some sensory consequences of trauma to peripheral nerves?
Definition
loss of sensation in region supplied by nerve
phantom pain/abnormal sensations
Term
What are some motor consequences of trauma to peripheral nerves?
Definition
loss of motor function in region of damage
hypotonia
areflexia
atrophy
fasiculations
Autonomic consequences variable
Term
What are the symptoms of peripheral neuropathy?
Definition
loss of sensation in hands or feet
Weakness of skeletal muscle
Autonomic - orthostatic hypotension, GI problems, Thermoregulation, vision, sexual dysfunction
Term
Which condition is the only neuromuscular disease that involves both rapid fatigue of voluntary muscle and prolonged recovery time?
Definition
Myasthenia Gravis
Term
What is mortality with Myasthenia Gravis due to?
Definition
Respiratory Failure
Term
What is the peak age of onset for Myasthenia Gravis?
Definition
Peak Onset at 20y/o
Term
What is the pathophysiological cause of Myasthenia Gravis?
Definition
The number of normal acetylcholine receptors is reduced due to autoimmune damage of the receptors
Term
Which condition is characterized by sx including progressive muscle weakness, early fatiguability with activity, that usually presents with ocular sx including diplopia and ptosis?
Definition
Myasthenia Gravis
Term
What are some signs of respiratory muscle weakness in pts with Myasthenia Gravis?
Definition
weak cough
attacks of dyspnea
inability to clear mucus
Term
What is the treatment for myasthenia gravis?
Definition
Anticholinesterase
Prednisone to tx AI attack
Term
How is Myasthenia Gravis diagnoses confirmed?
Definition
Tensilon Test - Anticholinesterase drug given IV with marked improvement in muscle strength within 30 seconds
Term
Which type of crisis associated with the disease Myasthenia Gravis is treated with more anticholinesterase meds?
Definition
Myasthenic Crisis
Term
Which type of crisis associated with the disease Myasthenia Gravis is due to an excess of anticholinesterase meds?
Definition
Cholinergic Crisis
Term
Is Guillain-Barre Syndrome slow-onset or rapid onset? Where do the sx begin and what is the pattern of movement?
Definition
Rapid Onset; Ascending motor paralysis starting in the legs
Term
When are symptoms with Guillain-Barre Syndrome most severe?
Definition
Most severe within 3 weeks
Term
What is the prognosis for a pt with Guillain-Barre Syndrome?
Definition
Pt can recover fully within a few weeks to years
Term
What are the positive symptoms of Guillain-Barre Syndrome?
Definition
pain and paresthesia
Term
What are the negative symptoms of Guillain-Barre Syndrome?
Definition
muscle weakness, paralysis, loss of DTRs and decreased sensation
Term
What type of onset is Guillain-Burre Syndrome (sudden or slow)? What do patients generally present with?
Definition
Rapidly progresses in an ascending fashion
Pts generally notice a weakness in their legs "rubbery legs", or legs that tend to buckle
Term
What is the treatment for Guillain-Barre syndrome?
Definition
supportive care
ventilation prn
plasmapheresis
meds (steroids)
Term
When does postpolio syndrome occur?
Definition
Occurs 20 to 30 y after poliomyelitis
Term
What is the classic triad in postpolio syndrome? Which part of the body is most often affected?
Definition
Unusual Fatigue
New Muscle Weakness (+/- atrophy)
Muscle Pain - often with twitching
Limb are most often affected
Term
What condition is an infection of the meninges?
Definition
Meningitis
Term
What condition is characterized by symptoms including acute onset of HA, fever and nuchal rigidity other sx may include N/V, rashes, sore throat and malaise?
Definition
Meningitis
Term
What condition presents with menigitis and decreased level of consciousness, and seizures and focal symptoms?
Definition
Encephalitis
Term
Which condition begins with sx including vomiting, convulsions, delirium and coma then progresses to acute encephalopathy, fatty infiltration of the liver and decerebrate posturing and coma?
Definition
Reye Syndrome
Term
What posturing is characteristic of Reye syndrome?
Definition
Decerebrate Posturing (Extensor Response)
Term
What is the most important tx for Reye syndrome?
Definition
Reduce intracranial pressure
Term
What is the best study to see fatty infiltration of the liver?
Definition
Ultrasound study of the Liver
Term
Which bacteria are the common pathogens infecting the meninges and parenchyma of the brain?
Definition
Staph Aureus, Strep Pneumo, and HiB
Term
What are the most common entry points of bacteria infections?
Definition
ears
mastoids
sinuses
face
Term
What is the best prevention of bacterial infection in the CNS?
Definition
Early treatment of infection in portal of entry
Term
What condition is characterized by HA, N/V and decreased LOC (Level of Consciousness)?
Definition
Brain Abscess caused by bacterial infection
Term
What condition is described as the result of excess paroxysmal d/c from a hyperexcitable group of neurons?
Definition
Seizure Disorder
Term
With simple partial, complex partial and generalized seizures, describe the level of consciousness of each?
Definition
Simple Partial - No LOC, pt is aware of seizure
Complex Partial - No LOC, pt has amnesia of seizure event
Generalized - Pt is unconscious and unaware of their seizure and surroundings
Term
Which seizure type is described as lasting for less than a minute and includes sx such as abnormal uncontrolled movement, twitching, abnormal smells, sounds or sensations, tachycardia, flushing, tachypnea, memory distortions and dysphagia?
Definition
Simple Partial Seizure
Term
Which type of seizure is described as disturbances in higher level cognitive function which creates sx including coordinated involuntary repetitive movements ("robot-like")?
Definition
Complex Partial
Term
What area of the brain do most complex partial seizures arise from?
Definition
medial temporal or inferior frontal lobes
Term
Which type of generalized seizure is described as sudden brief lapses of consciousness without loss of postural control that last for a short time period?
Definition
Absence Seizures
Term
Which type of generalized seizure has sx including rapid eye blinking, and vacant stare with rapid return to consciousness and resumption of activity?
Definition
Absence Seizures
Term
When do absence seizures usually begin?
Definition
Childhood age 4 - 14 y/o
Term
Which general seizure is the classic seizure of epilepsy?
Definition
Tonic-Clonic Seizures
Term
What state follows a tonic-clonic seizure? How long can this state last? What are some sx of this state?
Definition
Post-Ictal state
Lasts up to 30min
Pt may be confused, depressed, agitated
Term
Where does a tonic-clonic seizure originate in the brain?
Definition
from both hemispheres simultaneously
Term
Which type of generalized seizure is described as beginning with a loud cry, with patient falling unconscious then body goes through stiffening/contraction and relaxation cycles repeatedly, additionally incontinence may occur?
Definition
Tonic/Clonic Seizures
Term
Which type of generalized seizure is described as "jumps" or sudden shock-like movements localized to a few muscles or limbs and tends to be brief?
Definition
Myoclonic Seizures
Term
Which type of generalized seizure is described as a sudden loss of muscle tone with loss of body posture, aka "drop attacks"?
Definition
Atonic Seizures
Term
What is a serious complication of Tonic seizures?
Definition
Respiratory Arrest
Term
Which type of generalized seizure is described as a sudden increase in muscle tone such as a stiffening of the face and upper body with flexion of the arms and extension of the legs, with the possibility of head and eye deviation to one side?
Definition
Tonic Seizures
Term
Which type of generalized seizure is described as slow single or multiple sharp, repetitive jerking movements of arms, legs or torso?
Definition
Clonic Seizures
Term
What term is described as continuous or intermittent seizure activity lasting 20 min or longer during which the pt does NOT regain consciousness?
Definition
Status Epilepticus
Term
What physiologic effects occur after less than 15 min of tonic-clonic seizures?
Definition
tachycardia
elevated BP
hyperglycemia
elevated temp
leukocytosis
Term
What physiologic effects occur after 15 to 30 min of tonic-clonic seizures?
Definition
hypotension
hypoglycemia
dysrhythmias
pulmonary edema
Term
What physiologic effects occur after 1 hour of tonic-clonic seizures?
Definition
hypotension w/decreased cerebral blood flow
disruption of BBB causing cerebral edema
Term
What is the tx for seizure disorders?
Definition
Benzodiazepines (Ativan, Valium)
Term
What is the Gold Standard study for diagnosing a seizure disorder?
Definition
Video EEG monitoring
Term
What is the normal range for intercranial pressure?
Definition
50 - 200 mm water
Term
What are increased Intercranial pressures due to?
Definition
brain tumors
brain injury
obstruction of CSF flow
Term
What type of posturing occurs when lesion is above the brainstem?
Definition
Decorticate Posturing (Arms In - Up)
Term
What type of posturing occurs when a brain lesion or increased ICP interrupts signals from higher structures to the pons and medulla (lower structures) causing damage to the brainstem?
Definition
Decerebrate Posturing (Arms Out - Low)
Term
What condition has signs and symptoms including dilated pupils with no light reaction?
Definition
Cerebral Edema
Term
When do comas occur?
Definition
When both hemispheres or brainstem are dysfunctional
Term
What are the three layers of the meninges from outside in?
Definition
Dura Mater
Arachnoid Mater
Pia Mater
Term
What type of bleed is an epidural hematoma caused by? Which vessel is usually involved?
Definition
Arterial bleed from the middle meningeal artery
Term
What type of bleed is an subdural hematoma caused by?
Definition
Venous bleeding
Term
When does the primary damage of spinal chord injury occur? What are the causes of secondary damage of spinal chord injury?
Definition
Primary - Caused by initial trauma at time of injury
Secondary - Caused by inflammation, edema, and cord hypoxia
Term
What is the basic tx for spinal cord injury?
Definition
immobilization and steroids
Term
What temporary condition is described as a loss of autonomic nervous control, areflexia, loss of sensation and flaccid paralysis that is usually caused by trauma? How is it tx and what is the time frame of administration?
Definition
Spinal Shock; Steroids w/in 3 h of injury
Term
What is the most common type of brain tumor? Are they most often benign or malignant?
Definition
Gliomas; malignant
Term
What condition has characteristic signs and sx including seizures, HA, Increased ICP, N/V and papilledema?
Definition
Brain Tumor
Term
Which type of spinal cord tumors arise from the bone or within the extradural space? Are these generally benign or malignant?
Definition
Extradural tumors; malignant
Term
Which type of spinal cord tumor lies between the dura mater and the spinal cord?
Definition
Intradural extramedullary tumors
Term
Which type of spinal cord tumors arise from within the spinal cord itself?
Definition
Intradural intramedullary tumors
Term
What is the difference in duration between acute and chronic pain?
Definition
acute = < 3 m
chronic = > 3 m
Term
What can chronic pain lead to?
Definition
Social withdrawl/depression
preoccupation with health leading to inappropriate use of healthcare
Term
Which type of chronic pain has no identifiable physical cause?
Definition
Psychogenic
Term
Which type of chronic pain has multiple dramatic physical complaints?
Definition
Somatization
Term
Which type of chronic pain has pathologic preoccupation with minor symptoms?
Definition
Hypochondriasis
Term
Which type of chronic pain has a physical (identifiable) cause?
Definition
Organic
Term
Which type of HA condition has sx including severe unilateral pounding/throbbing, N/V, photophobia, phonophoboa?
Definition
Migraine HA
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