New Jersey’s highest court ruled Thursday that expert testimony about shaken baby syndrome is scientifically unreliable and inadmissible in two upcoming trials, a decision that comes as the long-held medical diagnoses have come under increased scrutiny.

The New Jersey Supreme Court determined that a diagnosis of shaken baby syndrome, which is also known as abusive head trauma, is not generally accepted within the “biomechanical community” and is therefore not “sufficiently reliable” for admission at the trials.

The 6-1 ruling deals with the trials of two men facing charges in separate cases, where the young victims showed symptoms that have come to be associated with shaken baby syndrome.

The justices, using an abbreviation for the syndrome, concluded in their lengthy decision that “the

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