Yuki Hanazuka

• PhD
• Researcher at Chuo University

Marcel Proust had interactions with a lot of neurologists through treatments of his asthma. His great work, "In Search of Lost Time", is one of the highest masterpieces in French literature, about which numerous reviews have been published from various angles as well as literature. This work is also important for neurology, as the origin of Proust'...

Alzheimer's disease (AD) is a disorder in which individuals experience a difficulty in maintaining event memory for when, where, who, and what. However, verbal deficiency, one of the other symptoms of AD, may prevent a precise diagnosis of event memory because existing tests are based on verbal instructions by the tester and verbal response from pa...

Oshikuramanju is a simple Japanese, competitive game and we adapted the name to describe "competition" between different brain functions related to Savant syndrome. We also show that Savant-like ability exists in animals other than humans and describe three types of Savant syndrome: autistic, acquired, and transcranial magnetic stimulation.

We report on the case of an extraordinary orangutan who spontaneously produced over a thousand drawings in 5 years. This female orangutan, Molly, started drawing when she was estimated to be 50 years old. Although it has been established that great apes spontaneously draw without training, she produced an enormous number of paintings in her old age...

The ability to recognize oneself in a mirror is known as self-recognition, whereas delayed self-recognition is the ability to recognize the relationship between current self and past actions. While 3-year-old human children have self-recognition without the ability for delayed self-recognition, 4-year-old human children demonstrate the capability f...

This study investigated the usefulness of using an iPad to provide cognitive enrichment to a Sumatran orangutan, Pongo abelli, at the Higashiyama Zoo and Botanical Gardens. An iPad covered with an acrylic plate was set up on a grid in a combined rest room and indoor enclosure. Using the iPad, we presented the orangutan with the applications for dra...

Many social animals can discriminate between familiar and unfamiliar faces. Orangutans, however, lead a semi-solitary life and spend much of the day alone. As such, they may be less adept at recognizing conspecifics and are a good model for determining how social structure influences the evolution of social cognition such as facial recognition. The...

Although previous studies have confirmed that trained orangutans visually discriminate between mammals and artificial objects, whether orangutans without operant conditioning can discriminate remains unknown. The visual discrimination ability in an orangutan (Pongo pygmaeus) with no experience in operant learning was examined using measures of visu...