Time To Read
Date Last Modified
MODULE 11:
The Autonomic Nervous System
PART 4 OF 7
It started as a fluke — a jolt of pain across Stina’s cheek when a cold wind hit her at a bus stop. Then a breeze, chewing, even brushing her teeth could set off a brief, electric stab down one side of her face, and — strangely — ordinary painkillers did nothing. That combination points to a specific nerve behaving in a specific way.
Slide 1 Transcript
PATIENT CHART
STINA
THIS PART
Age 45
PRESENTING WITH
Disabling facial pain, hearing loss, wire-but exhausted feeling
DIAGNOSIS
Dysautonomia
DRUGS PERSCRIBED
Anti-seizure Drugs
CHART CLUES
COLLECTED AS YOU GO
Multi-Organ Autonomic Dysfunction
‘Revved’ Flares
Autonomic Symptoms Track Inflammation
Trigeminal Neuralgia
Cochlear Hair-Cell Injury
Two Cranial Nerves Affected
Dysautonomia
Put your money down: What kind of nerve behaves like that?
A cold breeze, chewing, even brushing her teeth set off brief, electric, one-sided face pain for Stina — and ordinary painkillers did nothing.
Pick the answer you believe now. We’ll come back to it later!
A Stab in the Face
It started as a fluke — a jolt of pain across Stina’s cheek when a cold wind hit her at a bus stop. Then a toothbrush set it off. Then chewing. The pain was unlike anything she knew: brief, electric, savage, gone in seconds, always on one side of her face. Ordinary painkillers did nothing. A neurologist finally named it — trigeminal neuralgia — and, crucially, reached for a different class of drug entirely.
Placeholder
Placeholder
Slide 2 Transcript
Cash out the clip
Placeholder
Placeholder
Placeholder
Slide 3 Transcript
Cash out the clip
Placeholder
Cranial Nerve V and Why It Misfires
The trigeminal nerve is cranial nerve V (CN V), the great sensory nerve of the face; it carries touch, pain, and temperature from the forehead, cheek, and jaw. Trigeminal neuralgia is a disorder of that nerve in which light, ordinarily harmless touch — a breeze, a toothbrush — triggers paroxysms of severe, electric, stabbing pain. It is classically associated with irritation or demyelination of the nerve. And because the pain comes from abnormal, hyperexcitable nerve firing rather than ordinary tissue damage, it responds to anticonvulsants that calm electrical misfiring — not to the standard analgesics that target inflammation or pain receptorsProteins located on the surface or inside cells that bind specific molecules (e.g., neurotransmitter.
Placeholder
Placeholder
Slide 4 Transcript
Cash out the clip
Placeholder
Placeholder
Placeholder
Slide 5 Transcript
Cash out the clip
Placeholder
An Inflamed, Demyelinating Nerve Discharging
That drug choice is the tell, and so is the company the diagnosis keeps: a nervous systemThe organ system that controls body functions using electrical and chemical signals. already shown to be inflamed and demyelinating (the Brain module) is exactly the soil in which CN V misfires. Stina’s face pain wasn’t a dental problem or a fluke — it was an inflamed, demyelinating nervous system discharging through a specific cranial nerve.
Placeholder
Placeholder
Slide 6 Transcript
Cash out the clip
Placeholder
Placeholder
Placeholder
Slide 7 Transcript
Cash out the clip
Placeholder
Placeholder
Placeholder
Slide 8 Transcript
Cash out the clip
Placeholder
FINDING!
Trigeminal Neuralgia (CN V) — Light Touch Triggering Electric Face Pain
Brief, severe, one-sided electric face pain triggered by a breeze, chewing, or brushing — and unresponsive to ordinary analgesics, but quieted by anticonvulsants. New evidence names it: trigeminal neuralgia of cranial nerve V, a misfiring sensory nerve consistent with the same inflamed, demyelinating process running her case.
Confirm or refute your bet: What kind of nerve behaves like that?
A cold breeze, chewing, even brushing her teeth set off brief, electric, one-sided face pain for Stina — and ordinary painkillers did nothing.
Slide 7 Transcript
NEXT PART
The same inflamed nervous system that lights up a face nerve can also injure a sense organ. Next: the cochlea, the hair cellsThe basic structural and functional units of life. that never grow back, and a high note quietly going missing.
PREVIOUS
NEXT
QUICK QUESTIONS
QUICK QUESTIONS
Hop to:
← Familial Mediterranean Fever — case home
All pages for Module 11 — The Autonomic Nervous System
11.0 Module Overview
11.1 The Bladder That Won’t Listen
11.2 Two Pedals
11.3 Chemical Messengers
11.4 A Stab in the Face
11.5 The Fading Sound
11.6 Windows and Receivers
11.7 Autonomic Instability
11.8 Conclusion and Assessment
11.9 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
- receptors
- nervous system
- cells
- development