Mitch McConnell
A psychologist analysing Mitch McConnell's public appearances has raised the possibility of neurological conditions including Lewy body dementia Wikimedia Commons/Drew Angerer

Mitch McConnell's return to the US Senate after a three-month absence has triggered renewed questions about his health, with psychologist Dr. John Garrison pointing to behaviour in publicly available footage that he says could be consistent with serious neurocognitive impairment, including conditions such as Parkinson's disease or Lewy body dementia.

However, Garrison has not examined McConnell and is not offering a medical diagnosis. His comments come after the 84-year-old Kentucky Republican appeared in a wheelchair and faced a confusing voting moment during a Senate Agriculture Committee proceeding.

McConnell Returned After a Lengthy Health Absence

McConnell returned to Capitol Hill on 14 September for the first time since a 14 June fall at his home left him briefly unconscious and led to hospitalisation. He was later treated for mild pneumonia and spent time in a rehabilitation facility before continuing his recovery at home.

The senator has acknowledged that he is still recovering. Before his return, he said his doctors had advised him to continue an intensive physical therapy programme.

When McConnell finally appeared at the Capitol, he arrived in a wheelchair and spoke briefly to reporters. He did not take questions but said, 'Time to get back to work, finish the job for this Congress.'

His prolonged absence had already fuelled public speculation about his condition. McConnell's office had provided limited information during his recovery, although the senator later confirmed that doctors had ruled out several serious injuries, including a concussion, stroke and brain haemorrhage.

Psychologist Spots Unusual Behaviour in Senate Footage

Garrison, a clinical and forensic psychologist, reviewed publicly available footage of McConnell's recent appearances for an analysis discussed by political commentator David Pakman.

According to Garrison's interpretation, McConnell appeared unusually still, with limited facial movement and little visible reaction to people around him. Garrison argued that the footage appeared to show difficulty processing or responding to what was happening.

However, those observations remain an interpretation of video footage rather than a clinical assessment.

Garrison has not examined McConnell personally and is not his doctor. That distinction is important because behaviour captured on camera cannot establish the cause of an individual's symptoms or confirm a neurological disorder.

The psychologist nevertheless highlighted what he described as a pattern that can sometimes appear in neurological conditions.

Lewy Body Dementia Is One Possibility Raised

Garrison said some of the characteristics he observed could be seen in conditions with Parkinsonian features, while also mentioning Lewy body dementia as another possibility.

Lewy body dementia is a progressive neurological disorder associated with changes in thinking, attention, movement and behaviour.

Symptoms can vary considerably between individuals, and diagnosing the condition requires a proper medical assessment rather than observation from video alone.

In McConnell's case, there is no publicly confirmed diagnosis of Lewy body dementia.

The senator's known medical history also provides several other factors that could affect his appearance and mobility. He has spoken about lingering effects from childhood polio and has been undergoing physical therapy following his June fall and hospitalisation.

His office has not announced a neurological diagnosis explaining the behaviour discussed by Garrison.