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Glossary of 1st AID USMLE Step 1 Neurology and Psychiatry Cerebral Cortex, Blood Supply, Cra

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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

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