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MODULE 10: The Brain
PART 6 OF 7
The radiologist’s flecks and Stina’s long-dismissed “brain fog” are, this page argues, the same finding seen two ways — on a scan and in a life.
Slide 1 Transcript
PATIENT CHART
STINA
THIS PART
Ages 45
PRESENTING WITH
Brain fog, pressureThe force exerted by gases in the respiratory system, affecting airflow and gas exchange. headache
TESTS ORDERED
MRI – found white matterThe outer portion of the spinal cord made of myelinated nerve fibers that transmit signals. hyperintensities
DIAGNOSIS
Neuroinflammatory White-Matter Injury
CHART CLUES
COLLECTED AS YOU GO
Age-Excessive White Matter Hyperintensities (WMH) on Brain MRI
Childhood Recurrent Fever Traced to the Hypothalamic Set-Point
Positional Pressure Headache — Intracranial Pressure / CSF Space
An Intact BBB Should Seal the Brain — Yet the Spots Appear
Chronic IL-1β/IL-6 Loosen BBB Tight Junctions — Microglia Activate
WMH + ‘Brain Fog’ Are One Finding — Neuroinflammatory White-Matter Injury
Chart Clue #10 — the Brain as Another Target Organ
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Story1
Stina had a private list of small failures she never mentioned to a doctor: the word on the tip of her tongue that wouldn’t come, the dropped thread of a conversation, the morning fog that took an extra hour to lift. She called it getting older. She called it being tired. What she didn’t know was that those moments and the bright spots on her MRI were describing the same injury from two directions — one in symptomsSubjective experiences reported by the patient (e.g., nausea, fatigue)., one in signal.
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Slide 2 Transcript
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Slide 3 Transcript
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story2
White matter is built from myelinated axons — the insulated cables that let brain regions talk to each other quickly. Persistent neuroinflammation damages this tissue in two linked ways: activated microgliaSmall CNS glial cells that act as macrophages, cleaning up debris and pathogens. and inflammatory cytokines injure the small blood vessels that feed the white matter, and they attack the myelin and the cellsThe basic structural and functional units of life. that maintain it. As small vessels become leaky and tractsBundles of nerve fibers in the CNS that carry signals between brain regions. lose myelin, the tissue’s waterThe universal solvent essential for life. content and structure change — and that change is exactly what shows up as a hyperintensity on MRI. Damaged, demyelinated wiring also slows the signaling between regions, which a person experiences as slowed processing, word-finding trouble, and “brain fog.”
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story3
So Stina’s scan and her symptoms are not two problems; they are one process. The WMH are neuroinflammation made visible, and the fog is that same neuroinflammation felt from the inside.
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Slide 7 Transcript
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FINDING!
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Slide 7 Transcript
NEXT PART
Six pages in, the spots have a mechanism and the fog has a cause. The last page puts them on one line with Stina’s lab values — and names what they spell. That line is Chart Clue #10.
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← Familial Mediterranean Fever — case home
All pages for Module 10 — The Brain & the Blood–Brain Barrier
10.0 Module Overview
10.1 Spots on the Scan
10.2 The Command Center
10.3 Cushions and Currents
10.4 The Wall
10.5 Breaching the Wall
10.6 White Matter Under Fire
10.7 Neuroinflammation
10.8 Conclusion and Assessment
10.9 Evidence Behind the Case
All Modules
- Anatomical Language, Membranes & Homeostasis
- Just Enough Chemistry
- The Cell & Its Transport
- Making Cells & Proteins
- The Integumentary System
- The Skeletal System
- The Muscular System
- Nervous Tissue & the Senses
- The Spinal Cord
- The Brain & the Blood–Brain Barrier
- The Autonomic Nervous System
- Special Senses (in developmentThe process of growth and differentiation.)
- The Endocrine System
- Blood
- The Heart
- Blood Vessels
- The Digestive System
- The Respiratory System
- The Urinary System
- Fluids, Electrolytes & Acid–Base Balance
- The Reproductive System
- The Immune System
List of terms
- pressure
- white matter
- symptoms
- microglia
- cells
- tracts
- water
- development