Daily Mail

The homeless alcoholic who sacked his butler

- NICK RENNISON

LOST AND FOUND by Jules Montague (Sceptre £20)

If we lose our memories, do we lose ourselves? If our personalit­ies change radically through illness, in what ways are we still the same people?

These are just two of the many questions that Irish neurologis­t Jules Montague poses in this remarkable book. ‘I have taken a journey through who we become when memories evaporate and personalit­y shifts and consciousn­ess ebbs and flows,’ she writes.

It’s well worth accompanyi­ng her on this journey, although some of the places she visits are disturbing.

Memory’s greatest enemy is probably Alzheimer’s — 47 million people worldwide are living with the disease, with one new case every 3.2 seconds. Its consequenc­es, as it erodes sufferers’ ability to remember who they are, are devastatin­g.

But other neurologic­al complaints, while rarer, can be equally destructiv­e. what to make of the man given the name Benjaman Kyle? found semi-naked and unconsciou­s, behind a Burger King in Richmond Hill, Georgia, he had almost complete amnesia. One of the few things he did remember was once eating a grilled cheese sandwich at the Indiana State fair.

Some patients fill the gaps in their memories with their own, often strange, inventions. Montague writes of a man named Charlie who sat in her clinic and cheerfully told her he’d just fired his butler for stealing a combine harvester.

He had also recently returned from a children’s charity where he handed out prizes and had a go on a pink trampoline. Charlie, a homeless alcoholic, wasn’t really lying. He believed what he was saying.

As Montague puts it: ‘The patient with implausibl­e tales cannot remember that he cannot remember.’

It’s as well to remember how malleable memory is. During a Nineties experiment, two psychologi­sts convinced a quarter of participan­ts that they had been lost in a shopping mall as a child, even though they hadn’t. Many recalled the trauma in vivid detail. ‘I was crying,’ one said. ‘I thought I’d never see my family again.’

And not only can we remember things we never experience­d, we forget experience­s that should be unforgetta­ble.

Montague, whose family come from India, has vivid memories of childhood holidays in Assam. Yet she cannot recall a safari with her uncle to track down a one-horned rhinoceros. They found one, her parents tell her. How could she have forgotten

something so memorable? Loss of memory, the glue that binds together the story of our lives, is not the only kind of damage neurologic­al disease can inflict.

Some patients suffer loss of personalit­y. Political orientatio­ns change. Right-wing authoritar­ians become bleeding-heart liberals. Atheists might undergo religious conversion­s.

And occasional­ly, new talents emerge alongside distressin­g changes in behaviour.

Montague quotes the case of a businessma­n who developed dementia. he started to undress in public. he shoplifted and insulted strangers in the street.

At the same time, he began to paint. he had never shown any previous interest in art, but his paintings were precise, detailed and skilful. The most extreme examples of personalit­y change occur in those suffering from multiple personalit­y disorder. Experts are warier of diagnosing this than they once were. It first came to public attention with Sybil, the subject of a bestsellin­g 1973 book and a TV mini- series starring Sally Field. Sybil, real name Shirley Mason, was apparently possessed by a host of identities, including Peggy Ann, Peggy Lou, a small child named Ruthie, Marcia, who was an artist and writer, and two male carpenters called Mike and Sid. The effect of Sybil’s story was dramatic. Before publicatio­n of the book, there had been 200 documented cases. Between 1985 and 1995, there were an estimated 40,000.

In 1979, Ken Bianchi, charged with several murders, argued that it wasn’t him, but his alter ego, Steve, who had committed them. his credibilit­y was undermined when it was discovered that he had watched the TV show of Sybil in his cell just before his interviews with psychiatri­sts.

Like the late Oliver Sacks, Jules Montague writes about bizarre cases. She tells us of conditions such as ‘negative heautos copy’, in which you are unable to see your own body as you stare down at it or look in a mirror.

And yet, she is also writing about what it is to be human and the surprising fragility of our sense of self. Lost And Found is a profoundly moving, revelatory book.

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