What is functional overlay?

Answer 1

When emotional reaction exacerbates or prolongs symptoms of an existing condition

Answer 2

Functional overlay is a technique used in integrated circuit design to optimize performance by overlaying additional functionality onto existing circuits. This can help improve efficiency, reduce area, and enhance chip performance without requiring a complete redesign of the circuit.

Answer 3

At the risk of making a hasty generalisation, ‘functional overlay’ is a term beloved of (and ripe for misuse by) medical professionals with little awareness of chronic pain, its causes and diagnoses. The terms ‘psychosomatic’ and ‘psychogenic’ are also used interchangeably with ‘functional overlay’.

A search online reveals that ‘functional overlay is interpreted as “the emotional response to physical illness.”

The term is found frequently in medical reports and medical records where often sceptical clinicians apply the term when they believe a patient’s symptoms are medically unexplained, i.e. when they can see no, or no obvious, organic reason for an individual’s continued symptoms. In other words, they believe those symptoms are largely or entirely a result of psychological factors.

Unfortunately, but possibly understandably, this is usually interpreted:

by the claimant as “he doesn’t believe me”;

by a large proportion of the legal profession as “another high maintenance client”; and by the whole of the insurance industry as “fraudulent claimant”!

Interestingly, when a medical expert in a claim is questioned in conference about their use of the term, the vast majority are quick to confirm that they don’t doubt the claimant’s veracity; it is simply that they cannot fathom why they still have symptoms, why the nature of those symptoms has changed or why the claimant reports that their symptoms are getting worse. The issue is therefore simply one of lack of awareness by the clinician and a failure to recommend onward referral to more appropriate specialisms (usually pain medicine, rheumatology and psychiatry).