MK Shared "2.6 FA Neurology" - 141 Picmonics

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2.6 FA Neurology

Central Nervous System (CNS)
Characteristics
Frontal Lobe
Parietal Lobe
Temporal Lobe
Occipital Lobe
Medulla Oblongata
Cerebellum
Pons
Spinal Cord
Dorsal Root Ganglia
Grey Matter
White Matter
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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
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
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 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
Electrical Synapse
Characteristics
Cardiac and Smooth Muscle Location
Fast Transmission
Bidirectional
Presynaptic Na+ Floods Through Gap Junction
Na+ Influx Initiates Postsynaptic Action Potential
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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
Somatic Reflex Arc
Spinal Cord
Sensory (Afferent) Neuron
Interneurons Transmit
Motor (Efferent) Neuron
Effector Targets
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1 min
Kluver-Bucy Syndrome
Bilateral Amygdala Lesion
Associated with HSV-1
Hyperorality
Hypersexuality
Disinhibited Behavior
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1 min
Wernicke-Korsakoff Syndrome
Thiamine deficiency
Confusion
Ophthalmoplegia
Ataxia
Korsakoff
Confabulation
Personality Changes
Memory loss
Alcoholics
Damage to medial dorsal nucleus
Damage to mammillary bodies
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2 mins
Cauda Equina Syndrome
Acute Loss of Lumbar Plexus Function
Surgical Emergency
Saddle Anesthesia
Causes
Inflammatory Disorders
Spinal Stenosis
Trauma
Lesions
Symptoms
Urinary and Fecal Incontinence
Sciatica
Diagnosis
Magnetic Resonance Imaging (MRI)
Clinical
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1 min
Circle of Willis
Characteristics
Anterior Cerebral Artery (ACA) Supplies Motor/Sensory Parts of the Cortex for Lower Extremities
Anterior Communicating Artery (Acomm) Connects ACA to ACA
Internal Carotid Arteries (ICA)
Middle Cerebral Arteries (MCA) Supply Cortex for Upper Limbs and Face
Posterior Communicating Artery (Pcomm) Connects ICA to PCA
Posterior Cerebral Arteries (PCA) Supply Occipital Cortex
Basilar Artery Supplies Medulla, Pons, and PCA
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3 mins
Anterior Cerebral Artery
Contralateral paralysis of lower limb
Contralateral loss of sensation in lower limb
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1 min
Middle Cerebral Artery
Contralateral paralysis upper limb and face
Contralateral loss of sensation of upper limb and face
Affects Wernicke's area and Broca's area
Aphasia if Lesion in Dominant (Left) Hemisphere
Hemineglect if lesion in nondominant (right) hemisphere
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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
Dermatomes - Thoracic
Characteristics
T1 - Medial Arm
T4 - Nipple
T7 - Xiphoid
T10 - Belly Button
T12 - Pubis
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57 secs
Dermatomes - Lumbosacral
L2 - Medial Thigh
L3 - Medial Knee
L4 - Kneecap, Medial Ankle and Big Toe
L5 - Dorsum of Foot
S1 - Lateral Foot, Posteriolateral Thigh
S 2, 3, 4, 5 - Perianal and Genitals
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2 mins
Pinealoma
Pathophysiology
Melatonin
Superior Colliculi
Obstructs Cerebral Aqueduct
Signs and Symptoms
Obstructive Hydrocephalus
Vomiting
Parinaud's Syndrome
Paralysis of Upward Gaze
Setting Sun Sign
Increased Beta-hCG
Precocious Puberty
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2 mins
Cranial Nerve Function
Sensory
CN I
CN II
CN VIII
Motor
CN III
CN IV
CN VI
CN XI
CN XII
Both
CN V
CN VII
CN IX
CN X
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1 min
CN I
Olfactory Nerve
Sensory
Smell
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35 secs

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