Jesse Shared "IMSK Exam 1" - 23 Picmonics

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IMSK Exam 1

Skeletal Muscle Contraction Initiation
Somatic Motor Neuron Releases Acetylcholine
Acetylcholine Causes Sodium Influx
Cell Reaches All-or-Nothing Threshold
Voltage-Gated Calcium Channels Open
Sarcoplasmic Reticulum Causes Calcium Flood
Calcium Flood Enters Myofibrils
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1 min
Skeletal Muscle Contraction Action
Characteristics
Calcium Binds Troponin
Active Site Exposed
Many Mitochondria Produce ATP
Myosin Head Binds
Power Stroke
Myosin Head Releases Active Site
ATP Consumed
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1 min
Neuron Action Potential Initiation
Characteristics
Summation of Signals
-50 mV Threshold Value Reached
Voltage-Gated Sodium Channels Open
Local Depolarization
Na+ Influx
Potassium Channels open
Repolarization
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2 mins
Neuron Action Potential Propagation
Characteristics
Unidirectional Depolarization
Absolute Refractory Period In Preceding Na+ Channels
Neighboring Voltage Gate Channels Open
Nodes of Ranvier
Myelination Increases Propagation Speed
Saltatory Conduction
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3 mins
Neuron Resting Potential
Characteristics
More Na+ Outside
Sodium-Potassium Pump
K+ Leaks Out
More K+ Inside
About -70mV
Voltage-Gated Sodium Channels are Closed
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2 mins
Autonomic Nervous System
Characteristics
Sympathetic Nervous System
Fight or Flight
All Preganglionic Neurons Release Acetylcholine
Sympathetic Postganglionic Neurons Release Norepinephrine
Antagonistic Effects of Sympathetic and Parasympathetic Nervous Systems
Parasympathetic Nervous System
Rest and Digest
Parasympathetic Postganglionic Neurons Release Acetylcholine
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2 mins
Lambert-Eaton Syndrome
Mechanism
Autoantibody to the Presynaptic Calcium Channel on Motor Neurons
Inhibits Acetylcholine (ACh) Release at Neuromuscular Junction
Paraneoplastic Syndrome
Small Cell Lung Cancer
Symptoms
Proximal Muscle Weakness
Improves with Muscle Use
Autonomic Symptoms
Extraocular Muscle Sparing
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2 mins
Chemical Synapse
Voltage-Gated Calcium Channels Open
Ca2+ Influx
Vesicle-Membrane Fusion
Exocytosis of Neurotransmitter
Neurotransmitter Binds Post-Synaptic Receptors
Neurotransmitter Breakdown
Neurotransmitter Reuptake
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1 min
Neck and Shoulder Muscles
Superficial
Splenius Capitis
Trapezius
Rhomboid Minor
Rhomboid Major
Deltoid
Latissimus Dorsi
Deep
Levator Scapulae
Supraspinatus
Infraspinatus
Teres Minor
Teres Major
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2 mins
Back Muscles
Superficial
Latissimus Dorsi
External Oblique
Internal Oblique
Gluteus Medius
Gluteus Maximus
Deep
Erector Spinae
Serratus Anterior
Serratus Posterior
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2 mins
Myasthenia Gravis
Mechanism
Antibodies to Acetylcholine Receptor
Symptoms
Ptosis
Diplopia
Weakness with Muscle Use
Respiratory Death
Thymus Associated
Treatment
Acetylcholinesterase Inhibitors
Plasmapheresis
Thymectomy
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1 min
Norepinephrine
Mechanism of Action
Alpha Agonist
Beta1 Agonist
Indications
Hypotension
Side Effect
Decreases Renal Blood Flow
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1 min
Dermatomes - Cervical
C2 - Posterior Cap Distribution
C3 - High Turtleneck
C4 - Low Collar Shirt
C5 - Anterolateral Shoulder
C6 - Thumb
C7 - Middle Finger
C8 - Pinky Finger
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1 min
CN XI
Accessory Nerve
Motor
Head Turning
Shoulder Shrugging
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35 secs
Guillain-Barre Syndrome Assessment
Assessment
Ascending Paralysis
Muscle Weakness
Paresthesias (Pins and Needles)
Diplopia
Difficulty Speaking
Dysphagia
Labile Blood Pressure
Loss of Bowel and Bladder Control
Considerations
Aggressive Airway Management
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2 mins
Somatic Reflex Arc
Spinal Cord
Sensory (Afferent) Neuron
Interneurons Transmit
Motor (Efferent) Neuron
Effector Targets
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1 min
Hyperkalemia
Assessment
> 5.0 mEq/L K+
Abdominal Cramps
Muscle Weakness
Diarrhea
Arrhythmia
Tall, Peaked T Waves
Interventions
IV Calcium
Infusion of Glucose and Insulin
Loop or Thiazide Diuretics
Kayexalate
Dialysis
Prevention Education
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2 mins
Lumbar Puncture
Indications
CSF Sample
CSF Pressure
Considerations
Empty Bladder
Side-lying Position
Between 3rd and 4th Lumbar Vertebrae
Number Tubes
Supine Position After Procedure
Contraindications
Increased ICP (Intracranial Pressure)
Infection at Puncture Site
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2 mins
Herniated Disc (Nucleus Pulposus)
Cause/Mechanism
Spine Trauma
Natural Degeneration
Spinal Stenosis
Assessment
Pain
Weakness
Urinary and Fecal Incontinence
Interventions
Brace
Medications
Outpatient Procedures
Surgery
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2 mins
Alpha 1 Receptor
Characteristics
Gq Subunit
Increase Vascular Smooth Muscle Contraction
Increase Pupillary Dilator Muscle Contraction
Increase Intestinal and Bladder Sphincter Muscle Contraction
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1 min

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