Michael Shared "2015 Study Guide Neurology" - 115 Picmonics
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2015 Study Guide Neurology
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
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
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
Huntington's Disease
- Pathophysiology
- Autosomal Dominant
- Trinucleotide Repeat
- CAG Repeats
- Chromosome 4
- Anticipation
- Caudate
- Decrease of ACh
- Decrease of GABA
- Signs and Symptoms
- Chorea
- Dementia
- Depression
- Glutamate Toxicity
- Neuronal Death via NMDA Binding
3 mins
Kluver-Bucy Syndrome
- Bilateral Amygdala Lesion
- Associated with HSV-1
- Hyperorality
- Hypersexuality
- Disinhibited Behavior
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
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
Anterior Cerebral Artery
- Contralateral paralysis of lower limb
- Contralateral loss of sensation in lower limb
1 min
Epidural Hematoma
- Mechanism
- Middle Meningeal Artery Rupture
- Temporal Bone Fracture
- Hematoma Between Skull And Dura Mater
- Transtentorial Herniation
- Lucid Interval
- Imaging
- Lens-shaped on CT
- Does Not Cross Suture Lines
- Treatment
- Craniotomy
1 min
Subdural Hematoma
- Mechanism
- Tear of Bridging Veins
- Slow Bleeding, Over Time
- Imaging
- Subdural Space
- Crescent-shaped on CT
- Crosses Suture Lines
- Midline Shift
- Causes
- Elderly
- Whiplash
- Abusive Head Trauma (Shaken Baby Syndrome)
2 mins
Subarachnoid Hemorrhage
- Bleeding into Subarachnoid Space
- Mechanisms
- Trauma
- Aneurysm Rupture
- AVM Rupture
- Vasospasm causes Ischemia
- Signs & Symptoms
- "Worst Headache Of My Life"
- Diagnosis
- Noncontrast Head CT
- Lumbar Puncture
- Angiography
- Considerations
- Surgery
- Blood Pressure Control
- Intracranial Pressure Control
- Nimodipine for Vasospasm Prophylaxis
3 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
Posterior Column (Dorsal Column)
- Ascending Pathway (Sensory)
- Sensations
- Proprioception
- Fine Touch
- Pressure
- Vibration Sensation
- Anatomy
- Dorsal Root
- Fasciculus Cuneatus
- Arms
- Fasciculus Gracilis
- Lower Limbs
- Lesions
- Vitamin B12 Deficiency
- Tabes Dorsalis
2 mins
Spinothalamic Tracts
- Ascending Pathway (Sensory)
- Lateral
- Temperature
- Pain
- Anterior
- Crude Touch
- Pressure
- Decussates at Anterior White Commisure
- Lesion
- Contralateral Anesthesia
2 mins
Friedreich's Ataxia
- Trinucleotide Repeat
- GAA Repeat
- Frataxin
- Mitochondrial Dysfunction
- Autosomal Recessive
- Hammertoes
- High Arches
- Kyphoscoliosis
- Lateral Corticospinal Tract
- Posterior Column
- Spinocerebellar Tract
- Type I Diabetes Mellitus
- Hypertrophic Cardiomyopathy
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
CN I
- Olfactory Nerve
- Sensory
- Smell
36 secs
