overview: 1. central nervous system (cns) 2. meninges 3....
TRANSCRIPT
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1 CNS, Meninges, CSF, ANS
Overview: 1. Central Nervous System (CNS) 2. Meninges 3. Cerebrospinal fluid (CSF) 4. Autonomic Nervous System (ANS)
3D mental images Correlations with functions and disease pathology
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2 CNS, Meninges, CSF, ANS
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3 CNS, Meninges, CSF, ANS
White matter
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4 CNS, Meninges, CSF, ANS
Medial surface of temporal lobe (mesial temproal lobe): major parts of Limbic system
Hippocampus: memory
Amygdala: emotions
parts of Limbic system
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5 CNS, Meninges, CSF, ANS
Brodmann’s area: cytoarchitetonic features Frontal lobe Primary motor area (4) Supplementary motor
area/Premotor area (6) Frontal eye area (8)
Parietal lobe Primary somatosensory area
(3,2,1) Temporal lobe Primary auditory area (41,42)
Occipital lobe Primary visual area (17)
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6 CNS, Meninges, CSF, ANS
SI (primary)
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7 CNS, Meninges, CSF, ANS
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8 CNS, Meninges, CSF, ANS
Somatotopic Organization: corresponding brain areas and body parts
Somatosensory Motor
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9 CNS, Meninges, CSF, ANS
Insula, Opercullum Insula: buried underneath lateral sulcus Operculum (“lid”); covering insula Circular sulcus: outlining insula
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10 CNS, Meninges, CSF, ANS
Insula
Operculum (frontal, parietal, temporal)
Circular sulcus
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11 CNS, Meninges, CSF, ANS
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12 CNS, Meninges, CSF, ANS
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13 CNS, Meninges, CSF, ANS
Caudate nucleus
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14 CNS, Meninges, CSF, ANS
CSF circulation Choroid plexuses → lateral ventricle → interventricular foramen → 3rd ventricle → cerebral aqueduct → 4th ventricle apertures → Median and Lateral
subarachnoid space (cisterns) →
arachnoid granulation → superior sagittal sinus
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15 CNS, Meninges, CSF, ANS
Lateral ventricle
Anterior horn Posterior horn Inferior horn Atrium (Trigon) Body Interventricular
foramen
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16 CNS, Meninges, CSF, ANS
Dissection of Lateral ventricle
Hippocampus
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17 CNS, Meninges, CSF, ANS
Circulation of CSF
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18 CNS, Meninges, CSF, ANS
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19 CNS, Meninges, CSF, ANS
Hydrocephalus
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20 CNS, Meninges, CSF, ANS
Meninges Dura Arachnoid Pia
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21 CNS, Meninges, CSF, ANS
Dural Reflections • Falx cerebri: separated in longitudinal fissure; attached to
crista galli of ethmoid and tentorium cerebelli • Tentorium cerebelli: tent-like to separate supra- and infra-
tentorial compartment; free edge forming tentorial notch and surrounding midbrain
• Falx cerebelli: midline dural fold in posterior fossa; attached to posterior-inferior surface of tentorium cerebelli
• Diaphragma sellae: circular fold, bridge over sella turcica; cover pituitary; with stalk of pituitary passing through the center
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22 CNS, Meninges, CSF, ANS
Dural folds
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23 CNS, Meninges, CSF, ANS
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24 CNS, Meninges, CSF, ANS
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25 CNS, Meninges, CSF, ANS
White matter connecting both hemispheres
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26 CNS, Meninges, CSF, ANS
Fax cerebri and Tentorium cerebelli on MRI
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27 CNS, Meninges, CSF, ANS
Herniation under falx
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28 CNS, Meninges, CSF, ANS
Herniation
Cingulate herniation (Subfalcine, Subfalxial) Under falx
Uncal herniation Transtentorial
Tonsillar herniation Foramen magnum
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29 CNS, Meninges, CSF, ANS
Dural reflection: Uncal herniation
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30 CNS, Meninges, CSF, ANS
Dura
Arachnoid
Pia
Cerebral vessel
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31 CNS, Meninges, CSF, ANS
Spaces in Meninges
Epidural: potential space between dura and skull Subdural: potential space between the innermost
dural layer and the dura-arachnoid interface Subarachnoid space: normally present; CSF-filled,
enlarged cistern, with intact cerebral vessels Basal cistern: pontine cistern, interpeduncular
cistern, cistern of the optic chiasma (chiasmatic cistern) Cistern magna Lumbar cistern (L2-S2): containing cauda equina
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32 CNS, Meninges, CSF, ANS
Cistern
Cistern magna
Interpeduncular cistern
Basal cistern
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33 CNS, Meninges, CSF, ANS
Hemorrhage (bleeding)
Meningeal a.: epidural hematoma
Dural venous sinus: subdural or epidural hematoma
Cerebral a/v: subarachnoid hemorrage (SAH), intracerebral hemorrhage Cerebral a
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34 CNS, Meninges, CSF, ANS
Epidural hematoma
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35 CNS, Meninges, CSF, ANS
Cerebral vessels
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36 CNS, Meninges, CSF, ANS
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37 CNS, Meninges, CSF, ANS
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38 CNS, Meninges, CSF, ANS
Cisterns on Imaging Studies
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39 CNS, Meninges, CSF, ANS
Cisterns on Imaging Studies (bleeding)
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40 CNS, Meninges, CSF, ANS
Autonomic Nervous System Pre-ganglionic neurons: CNS Sympathetic: thoracolumbar cord Parasympathetic: brainstem and
sacral cord Post-ganglionic nerves Sympathetic nerves >
parasympathetic nerves Transmitters Ganglia: acetylcholine (Ach) Sympathetic:
norepinephrine/epinephrine, (sweat glands: Ach)
Parasympathetic: Ach
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41 CNS, Meninges, CSF, ANS
Sympathetic division Pre-ganglionic neurons Intermediate cell column
(lateral horn) T1-L2/3 (Thoracolumbar)
Sympathetic ganglia neurons Superior cervical ganglia(SCG,
C2-3 via internal carotid artery), Middle cervical ganglia, and Stellate ganglia (Inferior cervical ganglia + T1) Sympathetic trunk,
Paravertebral ganglia, Prevertebral ganglia
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42 CNS, Meninges, CSF, ANS
Parasympathetic division Cranial parasympathetic nuclei in brainstem via Cranial nerve: 3,7,9,10
Sacral parasympathetic nuclei in gray mater of spinal cord (S2-4) ventral roots of S2-4, ventral rami, pelvic splanchnic nerves
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Horner syndrome
injury to the sympathetic system
Pupil (dilator muscle)
Eyelid (superior tarsal muscle)
Face (sweat glands)
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44 CNS, Meninges, CSF, ANS
Horner syndrome
signs/symptoms: same side as the lesion of the sympathetic trunk Miosis (x dilator muscles) Partial ptosis (x superior tarsal muscle) Anhidrosis
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45 CNS, Meninges, CSF, ANS
Organization of CNS Cerebral hemisphere Gray matter Cortex: Frontal, Parietal, Occipital, Temporal Hippocampus, Amygdala
Deep gray matter: Thalamus, Basal ganglia Cerebrospinal fluid and circulation Meninges and dural reflections Herniation: relationship to brainstem
Cerebral blood vessels Autonomic Nervous System organization and target tissues/organs