1st AID USMLE Step 1 Neurology and Psychiatry Cerebral Cortex, Blood Supply, Cra
Terms
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- Brodmann number: Premotor area
- 6
- Brodmann number: Frontal eye fields
- 8
- Brodmann number: motor speech area
- 44, 45. Broca's
- Brodmann number: principal motor area
- 4
- Brodmann number: Primary Auditroy Cortex
- 41, 42
- Brodmann number: Principal visual cortex
- 17
- Brodmann number: Associative auditory cortex
- 22, wernicke's area
- Structure which connects the language areas
-
arcuate fasciculus
22, wernicke's--arcuate fasciculus--> Broca's, 44,45 - Frontal lobe functions
- executive functions
- artery which supplies medial surface of brain, leg-foot area of motor and sensory cortices
- antrerior cerebral artery
- distribution of anterior cerebral artery
- medial surface of brain, leg foot area
- most common circle of Willis aneurysm; may cause visual field defects
- anterior communicating artery
- aneurysm here causes CN III palsy
- posterior communicating artery
- "arteries of stroke"
- lateral striate, divisions of middle cerebral artery
- arterial supply to internal capsule
- lateral striate of MCA
- blood supply to caudate
- lateral striate aa of MCA
- blood supply to globus pallidus
- lateral striate aa of MCA
- anterior or posterior circle of willis: general sensory dysfunction
- anterior
- anterior or posterior circle of willis: vertigo?
- posterior
- passage from lateral ventricle to 3rd ventricle
- foramen of monro
- passage from 3rd ventricle to 4th ventricle
- aqueduct of sylvius
- passage from 4th ventricle to subarachnoid space
-
foramina of Luschka=Lateral
foramen of Magendie=Medial - number of spinal nerves
- 31
- number of cervical nerves
- 8
- number of thoracic nerves
- 12
- number of lumbar nerves
- 5
- number of sacral nerves
- 5
- number of coccygeal nerves
- 1
- vertebral disk herniation usually occurs between what spinal levels
- L5 and S1
- Lower extent of spinal cord
- L1-L2
- Lower extent of subarachnoid space
- S2
- Lumbar puncture site
-
L3-L4, or L4-L5, at level of cauda equina
Between L3 and L5, keep the cord alive - ligaments pierced in a Lumbar puncture
-
supraspinous
interspinous
ligamentum flavum -
Ascending pressure, vibration, touch, and proprioception
1st order neuron -
dorsal root ganglion,
****ascends ipsilaterally in dorsal column -
ascending pain and temperature sensation
1st order neuron -
Dorsal root ganglion
**Sensory nerve enters spinal cord -
Voluntary motor control
Upper motor neuron -
Upper motor neuron:
1ary motor cortex
*descends ipsi until decuss at caudal medulla, descends contra - Dorsal column organization
-
F. gracuilis=legs: medial
F. cuneatus=arms: lateral
organized like person, arms outside legs inside - CNs that lie medially at brain stem
-
III, VI, XII
3(x2)=6(x2)=12 - CN I type
- Sensory
- CN II type
- Sensory
- CNIII type
- motor
- CN IV type
- Motor
- CN V type
- mixed
- CNVI type
- motor
-
taste 2/3 anterior
what nerve? - CNVII
- CNVIII type
-
sensory
hearing, balance -
taste posterior 1/3
what nerve? - CN IX
- taste from epiglottic region
- CN X
- CNXI type
- motor
- CNXII type
- Motor