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Billionaire entrepreneur Elon Musk's brain-chip startup Neuralink said on Tuesday it has received approval from an independent review board to begin recruitment for the first human trial of its brain implant for paralysis patients. Those with paralysis due to cervical spinal cord injury or amyotrophic lateral sclerosis may qualify for the study, it said, but did not reveal how many participants would be enrolled in the trial, which will take about six years to complete. (9/20)

The search for human participants is on as Neuralink embarks on its first clinical trial, the company announced Tuesday. Neuralink, a tech startup owned and co-founded by Elon Musk, received FDA approval in May to implant brain chips into humans. (Encinas and Snider, 9/20)

Elon Musk says no primates died as a result of Neuralink’s implants. A WIRED investigation now reveals the grisly specifics of their deaths as US authorities have been asked to investigate Musk’s claims. (Mehrotra and Cameron, 9/20)

After 18 years of living with Alzheimer's disease, Marti Kaye spends most of her time in a wheelchair, expressionless. That changes the minute her son Adam Kaye starts playing his guitar. (Jones, 9/21)

Poor oral hygiene is associated with an increased risk for myriad health problems, including heart disease, diabetes, cancer, rheumatoid arthritis and early death. The state of our teeth and gums, though, may be vital for our well-being beyond the mouth and body. Emerging evidence suggests that what goes on in our mouth can affect what goes on in our brain — and may even potentially affect our risk for dementia. (Sima, 9/21)

A new movement is pushing the medical and research world to include people with genetic mutations for ALS for the first time. (Mast, 9/21)