The brain is a strange and wonderful organ, not fully understood as yet, and highly complicated. When researchers feel that they have understood something, some new occurrence happens which makes everybody feel that there is a lot left to be understood. Why somebody is born a genius while others are of normal capabilities is not fully understood; in fact, why somebody is a genius in terms of chess vs. a gifted musician is also not understood. But what is being written here is even less understood. A fall into a ravine could cause severe injuries, or in some cases, depending on the height and the method of falling, even death could happen. But for the brain to be impacted in such a way that capability changes have happened while most of the life before the accident is forgotten is not totally unknown, but is extremely rare. In this case, this rancher fell into a ravine, and has forgotten most of the past life, but has developed what is called the Savant syndrome, and is extensively interested in the arts and in mathematics. Such an occurrence is very rare, and besides the impact on the person, the impact on others who were close to the lady would also be severe (link to article):
A former rancher has developed enhanced cognitive ability following a brain injury and is now an artist and poet who 'hears' colour and 'sees' sound. Leigh Erceq, form Northwestern Colorado, was diagnosed with Savant Syndrome after falling into a ravine and suffering spine and brain injuries. She remembers nothing of her life before the accident, not even the name of her mother, but since her fall she has developed new capabilities. The 47-year-old is alleged to have been a 'tomboy' NASCAR fan with no interest in the arts or mathematics, prior to the accident. She is now said to "see" sound and "hear" colours when she listens to music and enjoys tackling mathematical equations, according to ABC News Nightline.