problems of neurological function - bcgentry.yolasite.combcgentry.yolasite.com/resources/unit 10...
TRANSCRIPT
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Problems of Neurological
Function
Unit 10
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Independent Student Review
• Brain Anatomy and physiology of cerebral
hemispheres, diencephalon, brain stem,
and cerebellum
• Meninges, ventricles, flow of CSF
• Blood Brain barrier
• Auto-regulatory mechanism (effects of
CO2 and pH or H+ ions)
• Circle of Willis
• Cranial Nerves
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Independent Student Review(continued)
Motor Cortex Broca’s Area
Werricke’s Area Cerebellum
Four Ventricles
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Independent Student Review(continued)
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Neurological Disorders
• Multiple Sclerosis
• Amyotrophic Lateral Sclerosis –
ALS
• Myasthenia Gravis
• Inflammatory Brain Conditions
• Neoplasms
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Multiple Sclerosis
• What is it?
• Demyelinating
disorder of
white matter of
brain, SC, and
optic nerve
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Multiple Sclerosis
• Who gets it
• Mostly the young and
middle aged adult
• Women 2X more often
than men
• First signs and symptoms
20 – 40 years of age
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Multiple Sclerosis
Signs and Symptoms
• Exacerbations and remissions
• Fatigue and weakness
• Bowel and bladder dysfunction
• Vertigo
• Tinnitus
• Facial weakness
• Diplopia, nystagmus, optic
neuritis
• Hot baths worsens symptoms
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Signs and symptoms cont.
• Double Vision
• Electric shock sensations
• Slurred speech
• Lack of coordination
• Unsteady gait
• Stiffness or spasticity
• Forgetfulness
• Difficulty concentrating
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Multiple Sclerosis
• Diagnosis
• Stage 1 – MRI shows
inflammation and lesions
• Stage 2 – MRI shows
demyelination
• Sometimes CSF examined
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MRI Preparation
• Signed consent
• Offer earplugs
• Sedatives for claustrophobia
• Contraindications include:
• Follow up care
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Multiple Sclerosis
• Treatment
• Symptomatic – muscle
relaxers e.g. Baclofen
• Steroids – especially with
acute exacerbation
• Immunosuppressive drugs
• Interferon beta – 1a
(Decreases number &
severity of relapses)
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Treatment continued
• Treatment of fatigue
• Treatment of depression
• Bladder control
• Muscle stiffness
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MS treatment other than
medication
• Physical Therapy
• Occupational Therapy
• Counseling
• Plasma exchange
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Lifestyle and Home Remedies
• Rest
• Exercise
• Avoid heat
• Cool down
• Well balanced diet
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Amyotrophic Lateral Sclerosis - ALS
Commonly known as
Lou Gehrig’s Disease
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Amyotrophic Lateral Sclerosis
ALS
• Who gets it
• Affects mostly men between 40 and 60
years of age
• What Causes it
• Degeneration of
• UMN in Cerebral cortex
• Cell bodies in the brainstem
• Anterior horn cells of SC
(degeneration starts in SC)
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Amyotrophic Lateral Sclerosis
ALS
• What is not effected?
• Entire sensory system
• Regulatory mechanism of control
• Coordination of movement
• Intellect remains intact
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Amyotrophic Lateral Sclerosis
ALS
• Signs and Symptoms
• When LMN’s die → denervation (=
lateralsclerosis in SC’s lateral
column) →muscle atrophy
(=amyotrophic)
• Generalized muscle weakness
• Paresis in localized muscle group
(may manifest as muscle cramps in
distal legs)
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Amyotrophic Lateral Sclerosis
ALS
• Diagnosis
• UMN involvement Dysphagia, dysarthria, dysphonia, spasm and rigidity, impaired fine motor control
• LMN involvement: weakness, muscle atrophy, hyporeflexia, fasciculation
• In some ways ALS sounds a little like MS
• ALS is distinguished by impairment of respiratory muscle
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Amyotrophic Lateral Sclerosis
ALS
• Treatment
• No cure
• Antispasmodic drugs and respiratory support
• Medication:
• Riluzole (Rilutek) – only drug available for ALS
• May increase liver enzymes
• Nursing
• Prevent contractures
• Prevent pneumonia
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Myasthenia Gravis
• A disorder of the neuromuscular
junction
• A deficiency of acetycholine
receptors on muscle surface (there
may be only 20% normal receptors)
• Muscle receptors are destroyed by
an autoimmune process
• Defect in the transmission of nerve
impulses to skeletal muscle
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Clinical Manifestations
• Weakness of striated muscles
especially eye muscle
• Evidenced by ptosis and
diplopia
• Chewing andswallowing
difficulties
• Weakness of muscles of the
lower face
• Needs to support chin when
talking
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Diagnosis
• History and Physical examination
• Thyroid study
• Testing immune disorders
• Acetacholine receptor antibody testing
• CT scan
• The Tensilon Test
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Treatment
• Medication Mangement
• Antocholinesterase (Cholinergic)
• Immunosuppressive Therapy
• Prednisone
• Start at 20 mg increase daily
to 60 mg dose
• Continue for 3 months or until
clinical improvment
• Taper gradually to every other
day
• Azathioprine (Imuran)
• 2 mg / kg/ day
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Crisis
Myasthenic Crisis
• Result of severe
disease or too little
cholinesterase
inhibition
• The patient is unable
to maintain an airway
or make sufficient
respiratory movement
and requires
ventilation
• Increased BP and
Pulse
• Increased secretions
leading to Ineffective
airway clearance
Cholinergic crisis
• Nausea
• Vomiting
• Diarrhea
• Abdominal cramps
• Blurred vision
• Pallor
• Facial muscle
twitching
• Pupillary miosis
• Hypotension
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Crisis (cont)
• Myasthenic Crisis my be
precipitated by a number of
factors:
• Non-compliance with
medications
• Excessive activities
• Infection
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Inflammatory Brain Conditions
• Abscess
• Meningitis
• Viral
• Fungal
• Bacterial
• Encephalitis
• Arboviruses
• Enteroviruses
• Herpes Simplex Virus Type I
• Amebae
• Vasculitis
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ABSCESS
• Bacterial
• Secondary to Paranasal
sinuses
• Mastoids
• Middle ears
• Seeding
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• Fungal
• Coccidiodomycosis
• Mucormycosis
• Aspergillosis
• Parasitic
• Neurocysticerosis
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Meningitis
• Bacterial
• Viral
• Fungal
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Neoplasms• Primary Tumors
• Secondary Tumors
• PATHOPHYSIOLOGY
• Cerebral Edema / brain tissue
inflammation
• Increased ICP
• Focal neurologic deficits
• Obstruction of the flow of CSF
• Pituitary dysfunction
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Classification of Tumors
• Malignant or Benign
• Location
• Cellular Histologic or Anatomic
Origins
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Primary tumors of the brain
Gliomas
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Primary tumors of the brain
Meningiomas
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Primary tumors of the brain
• Pituitary tumors
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Treatments
• Surgery
• ETTH
• Transcranial hypophysectomy
• Radiation therapy
• Medications
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Primary tumors of the brain
• Acoustic Neuromas
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Secondary tumors of the brain• Most common origins
• Lungs
• Breast
• Colon
• Pancreas
• Kidney
• General symptoms
• Headaches
• Nausea and vomiting
• Visual symptoms
• Seizures
• changes in mentation or personality
• Papilledema – swelling of the optic disc
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Secondary tumors of the brain
• Diagnosis
• Physical Exam
• Neurologic Exam
• CT scan
• MRI
• Angiogram
• Spinal tap
• Myelogram
• Biopsy
• Needle
• Stereotactic
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Secondary tumors of the brain
• Interventions
• Nonsurgical Management
• Radiation
• Drug Therapy
• Chemotherapy
• Radiosurgery
• Gamma Knife
• Surgical Management
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• MS
• http://www.youtube.com/watch?v=DvaJ
9py-vOc&NR=1
• MG
• http://www.youtube.com/watch?v=jNRa
VnkQGs4&feature=PlayList&p=9C0081
BB02C2F93D&playnext=1&playnext_fr
om=PL&index=30
ALS
http://www.youtube.com/watch?v=W_0
TcqNtKVI
http://www.youtube.com/watch?v=fKzZ
UnH7Wuk