Hillary Clinton is known for frequently shaking her head while she’s listening to someone else speak, but was more going on during a Pennsylvania press conference?

While addressing the media after a rally in Harrisburg, Clinton’s head subtly shook up and down after she turned to her right to listen to a reporter’s question.

Watch:

Many people, including physicians, have speculated Hillary Clinton may have Parkinson’s disease.

WND reported:

And, it has been revealed that one of her top aides extensively researched a drug used to treat Parkinson’s and Alzheimer’s diseases.

While he worked for her at the State Department, Clinton Deputy Chief of Staff Jake Sullivan investigated the drug Provigil, according to an October 2011 emails sent to Clinton.

In one email, Sullivan tells Clinton the military administers Provigil, a drug that’s also used to treat narcolepsy and sleep-wake disorders.

He said doctors often prescribe Provigil to treat “excessive sleepiness in patients with Parkinson’s, Alzheimer’s and multiple sclerosis.”

And InfoWars reported:

By itself, it would be impossible to link Hillary Clinton with Parkinson’s Disease just based on her coughing. But the truth is that she has exhibited so many of the other symptoms as well.

According to Google, here are some of the other symptoms that Parkinson’s Disease victims often exhibit…

Tremor: can occur at rest, in the hands, limbs, or can be postural

Muscular: stiff muscles, difficulty standing, difficulty walking, difficulty with bodily movements, involuntary movements, muscle rigidity, problems with coordination, rhythmic muscle contractions, slow bodily movement, or slow shuffling gait

Sleep: daytime sleepiness, early awakening, nightmares, or restless sleep

Whole body: fatigue, dizziness, poor balance, or restlessness

Cognitive: amnesia, confusion in the evening hours, dementia, or difficulty thinking and understanding

A lot of those should ring a bell if you have been following Hillary’s bizarre behavior in recent months.

So was she just agreeing with the reporter, or did she slip and let her symptoms be seen?