Neurology Flashcards
[Neuro/NTD]
Types of neural tube defects? (3)
- Spina bifida
- Encephalocele
- Anencephaly
[Neuro/NTD]
3 forms of spina bifida
- Spina bifida occulta
- Meningocele
- Myelomeningocele
[Neuro/NTD]
Diagnosis?
Midline defect of the spinous process
Asymptomatic (m/c)
Leg weakness, Constipation, Neurogenic bladder
Commonly involved in L5-S1
Spina bifida occulta
[Neuro/NTD]
Diagnosis?
Defect in the posterior vertebral arches
Delay surgery: completely normal neurologic examinations and complete full-tliickness skin covering of the meningocele
Immediate surgical repair: cerebrospinal fluid (CSF) leaking from the meningocele, with incomplete skin covering need to prevent meningitis
Meningocele
[Neuro/NTD]
Diagnosis?
Posterior neuropore fails to close properly
Spinal cord protruding in the sag
Myelomeningocele
[Neuro/NTD]
Diagnosis?
Wasting of the small muscles of the hand
Sensory deficits of the arms
Absence of deep tendon reflexes in the upper extremities
Fluid cavity in the spinal cord
Cervical syrinx
[Neuro/Hydrocephalus]
Normal CSF volume?
Adult: __
Infant: __
Adult: 150 ml
Infant: 50 ml
[Neuro/Hydrocephalus/congenital]
Examples of congenital noncommunicating hydrocephalus? (3)
- Congenital aqueductal stenosis
- Dandy-Walker malformation
- Chiari malformations
[Neuro/Hydrocephalus/acquired]
Examples of acquired noncommunicating hydrocephalus? (4)
- Brain tumors
- Intraventricular clots
- Abscess
- Vein of Galen malformation
[Neuro/Hydrocephalus/acquired]
Name of anomaly?
Prenatal or neonatal period
Sudden increased in head circumference
Prominent visible scalp veins
Bruit from the fontanelle
Vein of Galen Malformation (VOGM)
[Neuro/Hydrocephalus]
Three types of hydrocephalus?
- Non-communicating
- Communicating
- Excessive CSF production
[Neuro/Hydrocephalus]
Examples of excessive CSF production hydrocephalus?
Functional choroid plexus papillomas and carcinomas
[Neuro/Hydrocephalus]
Cranial nerves involved in hydrocephalus? (2)
CN 3: Oculomotor
CN 6: Abducens
[Neuro/CN]
Names of cranial nerves? (12)
- Olfactory nerve
- Optic nerve
- Oculomotor nerve
- Trochlear nerve
- Trigeminal nerve
- Abducens nerve
- Facial nerve
- Auditory/vestibular nerve
- Glossopharyngeal nerve
- Vagus nerve
- Accessory nerve
- Hypoglossal nerve
[Neuro/CN]
Number of Olfactory nerve?
CN 1
[Neuro/CN]
Number of Optic nerve?
CN 2
[Neuro/CN]
Number of Oculomotor nerve?
CN 3
[Neuro/CN]
Number of Trochlear nerve?
CN 4
[Neuro/CN]
Number of Trigeminal nerve
CN 5
[Neuro/CN]
Number of Abducens nerve
CN 6
[Neuro/CN]
Number of Facial nerve?
CN 7
[Neuro/CN]
Number of Auditory/vestibular nerve?
CN 8
[Neuro/CN]
Number of Glossopharyngeal nerve?
CN 9
[Neuro/CN]
Number of Vagus nerve?
CN 10
[Neuro/CN]
Number of Accessory nerve
CN 11
[Neuro/CN]
Number of Hypoglossal nerve?
CN 12
[Neuro/CN]
Symptoms of CN 3 palsy?
Down and out eye deviation
[Neuro/CN]
Symptoms of CN 6 palsy?
Fail to abduct of the eye
[Neuro/Hydrocepalus]
Cushing triad for hydrocephalus?
- Bradycardia
- Systemic hypertension
- Altered respiratory rates
[Neuro/Hydrocepalus]
Name of sign?
Cause of this sign?
Sun setting sign
Upward gaze is impaired due to pressure on the midbrain (Hydrocephalus)
[Neuro/Hydro/DWM]
What consists of Dandy-Walker malformation? (3)
- Posterior fossa cyst that is continuous with the 4th ventricle
- Partial or complete absence of the cerebellar vermis
- Hydrocephalus.
[Neuro/Hydro]
Chiari malformation vs Dandy-Walker
Developmental delay
Hypotonia, later developing spasticity
Poor coordination
Ataxia
Dandy-Walker malformation
[Neuro/Hydro/Chiari]
Types of Chiari malformation? (3)
Type 1: cerebellar tonsils or vermis are pushed down below the level of the foramen magnum
Type 2: the 4th ventricle and lower medulla are pushed down below the level of the foramen magnum
Type 3: Herniation of the cerebellum occurs through a cervical spina bifida defect
[Neuro/Hydro/Chiari]
Dandy-Walker vs Chiari malformation type 1
Dysphagia (CN12)
Vertigo, ataxia
Sleep apnea
Headache, neck pain
(Symptoms occur due to dysfunction of lower cranial nerves, the brainstem, and/or the spinal cord.)
Chiari malformation type 1
[Neuro/Migrational anomalies]
Examples of neuronal Migrational anomalies? (5)
- Polymicrogyria
- Lissencephaly
- Schizencephaly
- Holoprosencephaly
- Agenesis of the corpus callosum
[Neuro/Migrational/Polymicrogyria]
Diagnosis?
Causes? (3)
Multiple small gyri
Symptoms varied, mild to severe
Developmental delay, intellectual disability, spasticity, microcephaly, seizure
Polymicrogyria
- Cause:
Intrauterine ischemic injuries
Intrauterine infection
Genetic syndromes (Aicardi syndrome, Zellweger spectrum syndrome)
[Neuro/Migrational/Lissencephaly]
Diagnosis?
Smooth cerebral surface with thickened cortical mantle and a lack of cerebral folds (gyri) and grooves (sulci)
Symptoms:
Failure to thrive
Microcephaly
Marked developmental delay
Severe epilepsy
Blind
Associated with Miller-Dieker syndrome
Lissencephaly
[Neuro/Migrational/Schizencephaly]
Definition of?
Unilateral or bilateral clefts within the cerebral hemispheres
Schizencephaly
[Neuro/Migrational/Holoprosencephaly]
Definition of?
Defective cleavage of the prosencephalon (i.e., forebrain or cerebral cortex, basal ganglia, thalamus, hypothalamus).
Failure of the formation of 2 cerebral hemispheres
Symptoms: Diabetes insipidus, Panhypopituitarism, Visual problems, Epilepsy, Facial anomaly
Associated with Trisomy 13
Holoprosencephaly
[Neuro/Migrational/Agenesis of corpus callosum]
Associated with agenesis of corpus callosum?
Associated autosomal trisomies (2)
Genetic syndrome (1)
Drug (1)
Trisomy 8
Trisomy 18
Aicardi syndrome
Cocaine
[Neuro/Cerebral palsy]
Causes of cerebral palsy? (5)
(Multifactorial)
1. Neonatal encephalopathy
2. Asphyxia
3. Low birth weight
4. Congenital malformation
5. Infection
[Neuro/Cerebral palsy]
Types of cerebral palsy? (5)
- Spastic (70%)
- Dyskinetic (15%)
- Ataxic (5%)
- Hypotonic (7%)
- Mixed (3%)
[Neuro/Cerebral palsy]
Most common preterm infant cerebral palsy type due to intraventricular hemorrhage?
Diplegic CP
(because the hypoxic damage involves the periventricular white matter where the descending motor fibers for the lower extremities are closer to the ventricles)
[Neuro/Cerebral palsy]
Medication to prevent cerebral palsy to mother?
Magnesium sulfate
[Neuro/UMN/LMN]
Characteristics of upper motor neuron lesions? (3)
Spasticity
Hyperreflexia
Absent fasiculations
[Neuro/UMN/LMN]
Characteristics of lower motor neuron lesions? (3)
Hypotonia
Hyporeflexia
Fasiculations
[Neuro/Cerebral palsy]
Symptoms of spastic cerebral palsy? (3)
(Upper motor neuron signs)
1. Weakness
2. Hypertonicity with contractures
3. Hyperreflexia with clonus
[Neuro/Cerebral palsy]
Symptoms of dyskinetic cerebral palsy?
Pathologic location of dyskinetic cerebral palsy?
Impaired, uncontrolled, and purposeless movements that disappear during sleep
Basal ganglia
[Neuro/Cerebral palsy]
Type of cerebral palsy due to neonatal bilirubin encephalopathy (kernicterus)?
Dystonic cerebral palsy
[Neuro/Cerebral palsy]
Medication for spasticity? (4)
- Diazepam
- Dantrolene sodium
- Baclofen
- Botox injection
[Neuro/Cerebral palsy]
Surgery for upper spasticity?
Selective dorsal rhizotomy
[Neuro/Chorea]
Causes of chorea?
- Primary
- Secondary (3)
- Primary
- Secondary
Sydenham chorea
SLE
Drugs/toxins (Oral contraceptive pills, Metoclopromide)
[Neuro/Chorea]
Medication to treat chorea?
Dopamine receptor blocker (Tetrabenazine)
[Neuro/Cerebrovascular disease]
Diagnosis?
Commonly affected artery?
Older children, adolescent
Secondary to trauma
An abrupt cessation of momentum (e.g., car accidents) or when the neck is violently and/or forcefully shaken
Headache, neck, or eye pain
Honer syndrome (miosis, ptosis, and anhidrosis): Internal carotid artery
Cervicocephalic arterial dissection
Internal carotid artery
[Neuro/Cerebrovascular disease]
Metabolic causes of ischemic stroke? (3)
- Fabry disease
- Homocystinuria
- MELAS (mitochondrial encephalopathy, lactic acidosis, and stroke-like episodes)
[Neuro/Cerebrovascular disease]
Most common artery for ischemic stroke in infant?
Middle cerebral artery
[Neuro/Cerebrovascular disease]
Associated syndrome high risk for saccular aneurysms? (4)
- Coarctation of the aorta
- Polycystic kidneys
- Ehlers-Danlos syndrome
- Marfan syndrome
[Neuro/Cerebrovascular disease]
Location of thrombosis?
Increased intracranial pressure: headache, papilledema, nausea, vomiting, and cranial nerve (CN) 6 palsy
Superior sagittal sinus thrombosis
[Neuro/Cerebrovascular disease]
Sinus thrombosis that is commonly associated with otitis media and mastoiditis, cerebral vein thrombosis?
Right lateral sinus thrombosis
[Neuro/Cerebrovascular disease]
Location of thrombosis?
Proptosis
Chemosis
Uni- or bilateral ophthalmoplegia (CN 3,4,5,6)
Associated with infection of the paranasal sinuses, face, nose, or mouth
Cavernous sinuses thrombosis
[Neuro/Head trauma]
Characteristics of basilar skull fracture? (5)
- Bilateral orbital ecchymoses (“raccoon eyes” or black eyes)
- Posterior auricular ecchymoses (Battle sign)
- Tympanic membrane discoloration
- Cerebrospinal fluid (CSF) otorrhea and rhinorrhea
- Pneumocephalus
[Neuro/Head trauma]
Cause?
After linear skull fracture
Late onset of focal seizures
Focal neurologic signs
Visible and palpable skull deformity
Leptomeningeal cyst