China's Shenzhou-21 Crew Runs Brain-Computer Tests in Space

China's Shenzhou-21 crew has reached the 6-month mark aboard the Chinese Space Station (CSS), releasing a new vlog that highlights a series of advanced neuroscience and brain-computer interface (BCI) experiments conducted in microgravity. The crew — Zhang Lu, Wu Fei, and Zhang Hongzhang — remained on duty through the May 1 holiday, pushing forward a packed research agenda.

The update, shared by official Chinese space channels on May 3, comes shortly after the crew completed their 3rd successful spacewalk earlier this spring.

Brain-Computer Interface Experiments Take Center Stage

The most notable research involves in-orbit EEG (electroencephalography) testing, which the crew reports is progressing smoothly. Using EEG acquisition devices and VR headsets, the astronauts are conducting multiple experiments that could have significant implications for both space exploration and terrestrial AI applications.

Key BCI and neuroscience experiments underway include:

• Weak-stimulus brain-computer interface testing — measuring neural responses to subtle stimuli in zero gravity
• Microgravity intuitive physics studies — examining how the brain processes physical intuition without normal gravitational cues
• Spatial cooperative coding and regulation experiments — investigating how the brain encodes and manages spatial cooperation tasks
• Emergency decision-making capability assessments — evaluating cognitive performance under stress in orbit
• In-orbit emotional state monitoring — tracking psychological well-being over extended missions

Ground-based researchers will use the downlinked data for follow-up analysis, building a growing dataset on how the human brain adapts to prolonged spaceflight.

Docking Simulations and Human Kinematics Research

Beyond neuroscience, the crew is actively training on the Tianhe core module's tele-operated rendezvous and docking system. Using translation and attitude control handles, all 3 astronauts practiced manual docking procedures — a critical skill for contingency scenarios.

Simultaneously, the team conducted kinematics experiments, capturing detailed motion data on how humans move and operate controls in microgravity. This research aims to quantitatively analyze astronaut posture patterns and movement characteristics during cabin operations, potentially informing the design of future spacecraft interfaces and even robotic control systems.

Station Maintenance and Health Monitoring

The crew's workload extends well beyond research. Routine but essential maintenance tasks filled much of their schedule during the update period.

On the environmental side, the astronauts performed inspections and maintenance on the regenerative life support system, which recycles air and water aboard the station. They also used professional noise measurement instruments to monitor sound levels across different sections of the station — an important factor for long-duration crew health.

Standard housekeeping duties included cabin cleaning and cargo organization, keeping the station operational for the remaining weeks of their mission.

Health Checks Keep Crew Mission-Ready

Medical monitoring remains a priority as the crew approaches the tail end of their 6-month stay. Recent health assessments included hearing tests and muscle ultrasound examinations, both critical for tracking the physiological effects of extended microgravity exposure.

The crew continues daily exercise routines using the station's onboard fitness equipment, a standard countermeasure against muscle atrophy and bone density loss that all long-duration space travelers must follow.

Why It Matters for AI and Neuroscience

The BCI experiments aboard the CSS are particularly noteworthy for the broader tech community. Collecting brain-computer interface data in microgravity offers a unique controlled environment that eliminates gravitational variables present in all Earth-based studies. This data could contribute to advances in neural interface technology, VR interaction models, and AI-driven cognitive assessment tools.

As China's space station program matures, its research output is increasingly intersecting with cutting-edge AI and human-computer interaction domains — areas where companies like Neuralink, Meta, and academic labs worldwide are racing to make breakthroughs.

The Shenzhou-21 crew is expected to return to Earth in the coming weeks, when the Shenzhou-22 mission arrives to take over operations aboard the CSS.