Peter suffers damage to his left frontal lobe and loses the ability to speak, although he can still understand speech. Despite the permanence of this damage, he is able to recover some of his speech due to the ability of other parts of the brain to take over lost function. This phenomenon is known by neuroscientists as

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The phenomenon of the brain's ability to reorganize neural pathways and adapt to changing circumstances after injury or damage is known as plasticity. In this case, Peter's brain is able to compensate for the lost function of the damaged left frontal lobe by using other areas of the brain to recover some of his speech abilities.

Peter Suffers Damage to His Left Frontal Lobe and Loses