The idea that brain development is not complete until the age of 25 pertains to the development of the prefrontal cortex. The prefrontal cortex forms part of the frontal lobe and is often referred to as the section of the brain responsible for logic. Compared to regions involved in learning languages, the prefrontal cortex is slower to develop. The area becomes more developed in adolescence, and adults benefit from a well-developed prefrontal cortex, allowing them to perfect skills that require focus, learning, and memory.

Multiple sources point toward research in the early 2000s as the one suggesting this area matures at the age of 25 specifically. However, the research was still ongoing at the time and involved magnetic resonance imaging scans of 2,000 people aged between 4 and 26 years old. In that research, the dorsal-lateral prefrontal cortex’s development timeline was observed to vary between individuals. So, the answer is that there is no conclusive proof that the brain stops developing at 25 or that there are correlations between certain behavior and brain changes.

How does the brain change throughout life? In a 2022 study, researchers analyzed over 120,000 MRI scans from over 100,000 participants, spanning a wide age range from 115 days post-conception to 100 years old. They created charts illustrating the growth of different brain tissues. It was discovered that most basic morphological properties reached their peak early in development, often before the sixth year of life. Consequently, changes occur rapidly in early development, while in later stages of life, they become more subtle and gradual. This indicates that a universal timeline for brain development across a lifetime is highly unlikely.

Presented in the show “Neurons, Simulated Intelligence” in 2020, the robot singing mouth could perform endless streams of prayers, generated by AI. The disembodied robot mouth is an experimental set-up to explore the possibilities of an approximation to celestial and numerous entitled by performing a potentially neverending chain of routines and devotional attempts for communication through self-learning software.

The Singing Roboto Mouth Is Well-Built

The robot mouth has an aluminum frame, silicone, motors, plaster, monitor, printer; computerized system using neuronal machine learning software. While the idea seems noble, the built quality combined with all the materials gives it a rather horrifying look. However, the results are outstanding.

When it was first presented to the public, the mouth got famous for its singing, however, the AI free text generation also works for regular speech. The AI text to speech/singing generation works in real-time and shows an amazing audio-mouth movement synchronization. Like other similar devices, this singing mouth uses a microphone to listen to itself speak and analyze what it hears to figure out whether it sounds right or not.

Originally Invented in 2011

The singing robot mouth was set on display at Robotech 2011. Professor Hideyuki Sawada from Kagawa University took the show with his invention, showing off a bizarre-looking AI mouth designed to look and function as close as possible to the real thing.

The original robot mouth was constructed complete with an air pump for lungs, eight fake vocal cords, a silicon tongue, and even a nasal resonance cavity that opens and closes. Back in 2011, the singing mouth tried to sing a Japanese children’s song, but it wasn’t as fast as today’s new prototype.

“I know that wasn’t much, but considering it’s an incipient technology, the whole thing was just borderline horrid” – Sawada said at the end of the 2011 show.

Even back then, Sawada knew that this project needed improvement and finally, we all saw some of the results and how improved this singing robotic mouth proved to be in 2020.