Neuro Flashcards
Adult derivatives of Telencephalon
Cerebral hemispheres
Lateral ventricles
Adult derivatives of Diencephalon
Thalamus
3rd ventricle
Adult derivatives of Mesencephalon
Midbrain
Aqueduct
Adult derivatives of the Metencephalon
Pons
Cerebellum
Upper part of 4th ventricle
Adult derivatives of Myelencephalon
Medulla
Lower part of 4th ventricle
Arnold-Chiari malformation (Chiari 2) is
Significant herniation of cerebellar tonsils and vermis through forament magnum with aqueductal stenosis and hydrocephalus
Anterior 2/3 of tongue sensation
Maxillary (CN 5)
Anterior 2/3 of tongue taste via
Facial (CN 7)
Posterior 1/3 of tongue taste and sensation
Glossopharangeal (CN 9)
Motor invervation of tongue via
Hypoglossal (CN 12)
Oligodendroglia damaged in (3)
- MS
- PML
- Leukodystrophies
Schwann cells damaged in
Guillan-Barré
C fibers are
Slow, unmyelinated fibers
Aδ fibers are
Fast, myelinated fibers
What types of fibers are located in Free nerve endings
C
Aδ
What type of fibers located in Meissner corpuscles
Large, myelinated fibers that adapt quickly
Meissner corpuscles found in
Glabrous (hairless) skin
Meissner corpuscles sense
Dynamic, fine/light touch
Position
Pacinian corpuscles found in
Deep skin layers
Ligaments
Joints
Pacinian corpuscles sense
Vibration
Pressure
Merkel discs found in
Basal epidermal layer
Hair follicles
Merkel discs sense
Pressure
Deep static touch
Position
What layer of peripheral N must be joined to save limb in reattachment
Perineurium
NE synthesis
Locus ceruleus in pons
Dopamine synthesis
Ventral tegmental and SNc in midbrain
5-HT synthesis
Raphe nucleus in Pons, Medulla, and Midbrain
ACh synthesis
Basal nucleus of Meynert
GABA synthesis
Nucleus accumbens
Leptin inhibits
Lateral area of hypothalamus
Circadian rhythm controls nocturnal release of (4)
- ACTH
- Prolactin
- Melatonin
- NE
Extraocular movement during REM sleep is due to
PPRF activity
Limbic system famous 5 F’s
- Feeding
- Fleeing
- Fighting
- Feeling
- Fuckinv
Structures of limbic system (5)
- Hippocampus
- Amygdala
- Fornix
- Mammillary body
- Cingulate gyrus
Striatum of Basal ganglia inculdes
Putamen (motor)
Caudate (cognitive)
Lentiform of Basal ganglia includes
Putamen
Globus pallidus
Hemiballismus lesion
Contralateral subthalamic nucleus
Chorea lesion
Basal ganglia
Athetosis lesion
Basal ganglia
Treat essential tremors
β-blockers
Primidone
Broca area
Motor region of speach located in frontal dominant lobe
Wernicke area
Associative auditory cortex in temporal dominant lobe
Bilateral lesion of Amygdala leads to
Klüver-Bucy syndrome
Bilateral lesion of Amygdala associated with
HSV-1
Right parietal-temporal cortex lesions leads to
Contralateral spatial neglect (Agnosia)
Left parietal-temporal cortex lesion leads to
Gerstmann syndrome:
Agraphia, acalculia, finger agnosia, and left-right disorientation
Lesion of RAS in midbrain leads to
Reduced level of arousal and wakefullness (coma)
Lesion of Cerebellar hemisphere leads to
Ipsilateral intention tremor, limb ataxia and loss of balance
Lesion of subthalamic nucleus leads to
Contralateral hemiballismus
PPRF lesion leads to
Eyes look away from side of lesion
Frontal eye field lesion leads to
Eyes look toward lesion
Conduction Aphasia due to damage to
Left superior temporal lobe
Left supramarginal gyrus
Secondarly to unmanaged HT leads to
Lacunar infact leading to contralateral hemiparesis/hemplegia
Medial medullary syndrome due to infarct of
Paramedian branches of ASA and vertebral A
Wallenberge (lateral medullary) syndrome due to incarct of
PICA
Charcot-Bouchard microaneurysm associated with
Chronic HT affects small vessels in basal ganglia and thalamus
Normal Pressure Hydrocephalus leads to
Wet, Wobbly and Wacky
Spinal cord extends to
L1-L2
Subarachnoid space lower border is
S@
Dorsal column senses (4)
- Pressure
- Vibration
- Fine touch
- Proprioception
Spinothalamic tract senses
Lateral: Pain and Temperature
Anterior: Crude touch and pressure
Werdnig-Hoffman disease is
Congenital degeneration of anterior horns of spinal cord destroying LMN leading to Floppy baby
AR
ALS due to
Defect in superoxide dismutase 1
ALS treatment
Riluzole
Tabes dorsalis associated with
Charcot joints
Shooting pain
Argyll Robertson pupils
Poliomyelitis is
Causes by poliovirus causing destruction to anterior horn of spinal cord causing LMN death
Friedreich ataxia symptoms (7)
- Staggering gate
- Frequent falling
- Nystagmus
- Dysarthria
- Pes cavus
- Hammer toes
- Hypertorphic cardiomyopathy
Reflex song
S1, 2: Buckle my shoe (Achille reflex)
L3, 4: Kick the door (Patellar reflex)
C5, 6: Pick up sticks (Bicept reflex)
C7, 9: Lay them strait (Tricept reflex)
CN that lie medially at brain stem
CN 3
CN 6
CN 12
Parinauld syndrome is
Paralysis of conjugate vertical gaze due to lesion in superior colliculi
Some Say Marry Money But My Brother Says Big Brains Matter Most
- Sesnory: Olfactory (CN1)
- Sesnory: Optic (CN2)
- Motor: Oculomotor (CN3)
- Motor: Trochlear (CN4)
- Both: Trigeminal (CN5)
- Motor: Abducent (CN6)
- Both: Facial (CN7)
- Sensory: Vestibulocochlear (CN8)
- Both: Glossopharyngeal (CN9)
- Both: Vagus (CN10)
- Motor: Accessory (CN11)
- Motor: Hypoglossal (CN12)
Corneal reflex
Afferent: CN 5 (nasociliary branch of ophthalmic)
Efferent: CN 7 (temporal branch: orbicularis oculi)
Lacrimation reflex
Afferent: CN 5
Efferent: CN7
Jaw jerk reflex
Afferent: CN 5
Efferent: CN 5 (motor-masseter)
Pupillary reflex
Afferent: CN 2
Efferent: CN 3
Gag reflex
Afferent: CN 9
Efferent: CN 10
Nucleus Solitarius
CN: 7, 9, 10
Visceral Sensory information: (taste, baroreceptor, gut distention)
Nucleus Ambiguus
CN: 9, 10, 11
Motor innervation of pharynx, laynx and upper esophagus
What exits out of Superior orbital fissure
CN 3, 4, 51, 6, ophthalmic vein, sympathetic fibers
What exits out of Forament Rotundum
CN 52
What exits out of Foramen Ovale
CN 53
What exits out of Foramen Spinosum
Middle meningeal artery
What exits out of Jugular foramen
CN 9, 10, 11, Jugular vein
CN 5 motor lesion results in
Jaw deviated toward side of lesion
CN 10 lesion results in
Uvula deviated away from side of lesion
CN 12 lesion (LMN) leads to
Tongue deviates toward side of lesion
Abnormal Rinne test:
Bone > Air
Conduction hearing loss
Weber test localized to affected ear in
Conductive hearing loss
Rinne test result in sensorineural hearing loss
Normal (air > bone)
Weber test localizes to unaffected ear in
Sensorineural hearing loss
Uveitis associated with (5)
- Sarcoid
- RA
- Juvenile idiopathis arthritis
- TB
- HLA-B27 associated conditions
Retinitis due to (3)
- CMV
- HSV
- HZV
1st order Neurons in Miosis of pupil is
Edinger-Westphal nucleus
MLF allows crosstalk between
CN 6 and CN3
Treatment of MS
Natalizumab
β-interferon
Guillian-Barré presentation
Symmetric ascending muscle weakness/paralysis begging in lower extremities
Guillian-Barré is
Autoimmune destruction of Schwann cells associated with C. jejuni and CMV
PML is due to
Destruction of Oligodendrocytes associated with JC virus in AIDs
Metachromatic leukodystrophy is
AR lysosomal storage disease due to Arylsulfatase A deficiency
Charcot-Marie-Tooth disease is
Also known as hereditary motor and sensory neuropathy (HMSN)
AD
Charcot-Marie-Tooth diesease associated with
Scoliosis and foot deformities
Sturge-Weber syndrome is
Activating mutation of GNAQ gene
STURGE-Weber syndrome
- Sporadic, port-wine Stain
- Tram track Ca on opposing gyri
- Unilateral
- Retardatio
- Glaucoma
- Epilepsy
Tuberous sclerosis are HAMARTOMAS
- Hamartoma in CNS and skin
- Angiofibromas
- Mitral regurgitation
- Ash-leaf spots
- Rhabdomyoma, Cardiac
- Tuberous sclerosis
- Autosomal dOminant
- Mental retardation
- Angiomyolipoma, Renal
- Seizure, Shagreen patchs
Meningioma arises from
Arachnoid cells
Hemanvioblastoma associated with
von Hippel-Lindau
Secondary polycythemia
Rosenthal fibers seen in
Astrocytoma
Homer-Wright rosettes seen in
Medulloblastoma
Perivascular rosettes seen in
Ependymoma
What drugs decrease aqueous humor synthesis used for Glaucoma
- α-Agonist:
- Epinephrine
- Brimondine
- β-Blockers:
- Timolol
- Betaxolol
- Carteolol
Opioid analgesics (8)
- Morphine
- Fentanyl
- Codeine
- Loperamide
- Methadone
- Meperidine
- Dextromethorphan
- Diphenoxylate
Butorphanol is
μ-opioid receptor partial agonist and κ-opioid receptor agonist
Advantages of using Butorphanol for pain
Causes less respiratory depression
Tramadol is
Very weak opioid agonist that also inhibits serotonin and NE reuptake
Ethosuximide MOA
Blocks thalamic T-type Ca channels used for Abscence seizures
Ethosuximide FGHIJ toxicity
- Fatigue
- GI distress
- Headache
- Itching
- Stevens-Johnson
Benzo MOA
Increase GABAA action used for Status epilepticus
Phenytoin MOA
Increase Na channel inactivation used for all seizures other than Absence
Phenytoin side effects (11)
- Nystagmus
- Diplopia
- Ataxia
- Sedation
- Gingival hyperplasia
- Hirsutism
- Peripheral neuropathy
- Megaloblastic anemia
- Teratogenesis
- SLE
- Stevens-Johnsons
Carbamazepine MOA
Increase Na channel inactivation used
Carbamazepine toxicity (6)
- Diplopia
- Ataxia
- Agranulocytosis, aplastic anemia
- Liver toxicity
- SIADH
- Stevens-Johnson
1st line for trigeminal neuralgia
Carbamazepine
Valproic acid MOA
Increase Na channel inactivation
Increase GABA concentration by inhibiting GABA transaminase
Valproic acid toxicity (4)
- GI
- Hepatotoxicity
- Tremor
- Weight gain
Gabapentin MOA
Inhibits high-voltage-activated Ca channel
GABA analog
Topiramate MOA
Blocks Na channels
Increase GABA action
Lamotrigine MOA
Blocks voltage-gated Na channels
Tiagabine MOA
Increase GABA by inhibiting re-uptake
Vigabatrin MOA
Increase GABA by inhibiting GABA transaminase
Anesthetics with increased solubility in lipids =
Increased potency = 1/MAC
IV anesthetics (5)
- Thiopental (barb)
- Midazolam (BZ)
- Ketamine (PCP analog)
- Opioids
- Propofol
Ketamine MOV
Blocks NMDA receptors
Memantine is
NMDA antagonist used for Alzheimers
Tetrabenazine and reserpine are
Huntington drugs that inhibit Vesicular Monamine Transporter (VMAT)
Haloperidol is
Dopamine receptor antagonist used for Huntington
-triptans are
5-HT1B/1D agonists that inhibit trigeminal N acivation