Steven Shared "Step 1 High Yield" - 240 Picmonics

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Step 1 High Yield

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
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
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3 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
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1 min
Myotonic Dystrophy
Pathophysiology
Autosomal Dominant
Trinucleotide Repeat
CTG
Signs and Symptoms
Facial Muscle Weakness
Frontal Balding
Sustained Grip
Conduction Defects
Cataracts
Selective Atrophy of Type 1 Fibers
Testicular Atrophy
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2 mins
Classic Galactosemia
Pathophysiology
Autosomal Recessive
Galactose-1-phosphate uridyltransferase is Absent (GALT)
Impaired Galactose-1-P to UDP-Galactose
Galactitol Accumulation in Lens
Signs and Symptoms
Infantile Cataracts
Failure to Thrive
Hepatomegaly
Jaundice
Intellectual Disability (Mental retardation)
Increased Risk E. Coli Sepsis
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2 mins
Galactokinase Deficiency
Autosomal Recessive
Galactose to galactose 1P
Galactose appears in blood and urine
Benign
Infantile Cataracts
Failure to develop a social smile
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2 mins
Alkaptonuria
Autosomal Recessive
Deficiency of homogentisic acid oxidase
In degradative pathway of tyrosine to fumarate
Homogentisic acid harmful to cartilage
Arthritis
Dark Connective Tissue
Urine turns black on standing
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1 min
Phenylketonuria (PKU)
Pathophysiology
Decreased phenylalanine hydroxylase
Decreased tetrahydrobiopterin cofactor
Autosomal Recessive
Tyrosine Becomes Essential
Phenylalanine found in Nutrasweet
Symptoms
Musty or mousy body odor
Growth retardation
Seizures
Intellectual Disability (Mental Retardation)
Hypopigmentation
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2 mins
Maple Syrup Urine Disease
Pathophysiology
Defect in alpha ketoacid dehydrogenase
Blocked degradation of branched chain amino acids
Leucine
Isoleucine
Valine
Signs and Symptoms
Seizures
Intellectual Disability (Mental Retardation)
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1 min
Pyruvate Dehydrogenase Deficiency
Characteristics
Acquired from Thiamine Deficiency
Backup of Alanine and Pyruvate
Symptoms and Complications
Neurologic Defects
Lactic Acidosis
Interventions
Ketogenic Nutrients
Lysine and Leucine (Ketogenic Nutrients)
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56 secs
Cystinuria
Pathophysiology
Defect of Renal Tubular Amino Acid Transporter
C-O-L-A Acronym
Cystine
Ornithine
Lysine
Arginine
Signs and Symptoms
Excess Cystine in Urine
Hexagonal Crystals
Staghorn Kidney Stones
Diagnosis
Cyanide Nitroprusside Test
Treatment
Acetazolamide to Alkalinize the Urine
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3 mins
Homocystinuria
Pathophysiology
Autosomal Recessive
4 Forms
Cystathionine Synthase Deficiency
Decreased Affinity of Cystathionine Synthase For Vitamin B6
Methionine Synthase Deficiency
Methylenetetrahydrofolate Reductase (MTHFR) Deficiency
Signs and Symptoms
Marfanoid Body Habitus
Kyphosis
Lens Subluxation (Inferior)
Intellectual Disability (Mental Retardation)
Atherosclerosis
Consideration
Dietary Deficiencies Can Elevate Homocysteine Levels
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3 mins
G6PD Deficiency
X-linked Recessive
Hemolytic Anemia
Inflammatory Response
Fava Beans
Sulfonamides
Primaquine
Anti TB Drugs
Heinz Bodies
Bite Cells
Prevalent Among African Americans due to Increased Malarial Resistance
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2 mins
Lesch-Nyhan Syndrome
X-linked Recessive
Absence of HGPRT
Hypoxanthine to IMP
Guanine to GMP
Excess uric acid
Gout
Retardation
Self-mutilation
Choreoathetosis
PRPP is increased
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2 mins
Niemann-Pick Disease
Pathophysiology
Autosomal Recessive
Sphingomyelinase Deficiency
More Common in Ashkenazi Jewish Population
Signs and Symptoms
Cherry Red Spot on Macula
Hepatosplenomegaly
Neurodegeneration
Diagnosis
Foam Cells
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1 min
Tay-Sachs Disease
Pathophysiology
Autosomal Recessive
Hexosaminidase A Deficiency
Increased GM2 Ganglioside
More Common in Ashkenazi Jewish Population
Signs and Symptoms
Cherry Red Spot on Macula
Neurodegeneration
Developmental Delay
Diagnosis
Onion Skin Lysosomes
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1 min
Hunter Syndrome
Pathophysiology
X-linked Recessive
Mucopolysaccharidoses
Iduronate Sulfatase Deficiency
Increased Dermatan Sulfate
Increased Heparan Sulfate
Signs and Symptoms
No Corneal Clouding
Aggressive Behavior
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1 min
Hurler Syndrome
Pathophysiology
Autosomal Recessive
Mucopolysaccharidoses
Alpha-L-Iduronidase Deficiency
Increased Heparan Sulfate
Increased Dermatan Sulfate
Signs and Symptoms
Hepatosplenomegaly
Developmental Delay
Gargoylism
Corneal Clouding
Airway Obstruction
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2 mins
Beriberi (Thiamine Deficiency)
Thiamine deficiency
Dry beriberi
Polyneuritis
Muscle wasting
Wet beriberi
Dilated Cardiomyopathy
Edema
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50 secs
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

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