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Giselle Petzinger

Keck School of Medicine at the University of Southern California

Giselle Petzinger, MD, is a board-certified neurologist at the Keck School of Medicine at the University of Southern California who specializes in Parkinson's disease. Her research focuses on neuroplasticity and brain repair mechanisms in clinical and preclinical models of Parkinson's disease. Her published work investigates the effects of exercise and physical activity on motor and cognitive function, as well as neuroimaging markers such as perivascular space volume and structural network connectivity.

21 claims checked on air: 1 context 1 overstated 16 supported 3 unverified 1 flagged

What they said on air - unverified

0:07:00unverifiedvery lowDr. Giselle Petzinger on Exercise for Parkinson's Disease

Approximately 40% of Parkinson's disease patients exhibit mild cognitive impairment at the time of diagnosis.

"The literature is sort of all over the place, but essentially they're reporting about 40% even upon diagnosis may already have some cognitive issues. Now, that's not the same thing as dementia. So this is called mild cognitive impairment" (said at 0:07:00)

No published record matching the claim that approximately 40% of patients exhibit mild cognitive impairment at the time of Parkinson's disease diagnosis was located; this does not prove the claim false.

0:30:04unverifiedvery lowDr. Giselle Petzinger on Exercise for Parkinson's Disease

In Parkinson's disease, approximately 40% of cells are lost before functional impairment becomes clinically evident.

"Parkinson's disease, remember, I mean, that think about that model itself. There's a threshold there. I mean, I've lost, you know, 40% of cells before I I show any functional impairment, right?" (said at 0:30:04)

No published record matching the claim that approximately 40% of cells are lost before functional impairment becomes clinically evident in Parkinson's disease was located; this does not prove the claim false.

1:08:20unverifiedvery lowDr. Giselle Petzinger on Exercise for Parkinson's Disease

Levodopa is less effective for cognitive dysfunction in Parkinson's disease than for motor symptoms because cognitive circuitry also involves acetylcholine, serotonin, and norepinephrine.

"And L-dopa does not do as much—it's not as effective for cognitive function. It has a role there, but it's one of many different chemicals: acetylcholine being another one, serotonin, norepinephrine being other ones." (said at 1:08:20)

No published record matching the claim that levodopa is less effective for cognitive dysfunction in Parkinson's disease because cognitive circuitry also involves acetylcholine, serotonin, and norepinephrine was located; this does not prove the claim false.

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