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
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
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
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
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
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
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
1 min
Somatic Reflex Arc
- Spinal Cord
- Sensory (Afferent) Neuron
- Interneurons Transmit
- Motor (Efferent) Neuron
- Effector Targets
1 min
Kluver-Bucy Syndrome
- Bilateral Amygdala Lesion
- Associated with HSV-1
- Hyperorality
- Hypersexuality
- Disinhibited Behavior
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
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
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
3 mins
Anterior Cerebral Artery
- Contralateral paralysis of lower limb
- Contralateral loss of sensation in lower limb
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
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
1 min
Dermatomes - Thoracic
- Characteristics
- T1 - Medial Arm
- T4 - Nipple
- T7 - Xiphoid
- T10 - Belly Button
- T12 - Pubis
58 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
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
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
1 min
CN I
- Olfactory Nerve
- Sensory
- Smell
36 secs
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