Table 1.

Summary of original research on cryonics.

Research aim	Methodology	Research outcome	References
Investigate the attitude of cryonicists worldwide	Questionnaire survey of 316 people in several cryonics' organizations	70% were members of a cryopreservation body. - “Theory of Cryonic Life Extension” was developed to explains one's interest in cryonics. - The concept of personal identity malleability was proposed.	(2)
To explore the general public attitudes toward cryonics in Germany	Online survey of 1,000 people (age range: from 16 to 69 years old)	47% were aware of cryonics. - 22% could imagine being cryopreserved. - 53% would participate in the latest technological developments.	(25)
Cryopreservation of the human brain.	The brain of a 78-year-old female was perfused with DMSO and glycerol and cryopreserved at 80°C, followed by examination of the integrity of adult neuron marker, doublecortin and synaptophysin in the cryopreserved brain post-thaw.	- Unchanged levels of adult neuron marker in the experimental brain cortex. - Markedly reduced immature doublecortin neurons in the hippocampus in cryoprotected brains. - Synaptophysin markers (hippocampus synaptic network) were intact after cryopreservation	(26)
To measure knowledge, interest and attitudes of internet users toward cryopreservation in USA	Online survey of 1,487 people	75% had previously heard of the topic - 20% expressed interest in signing up - 21% had actively researched the topic. - 6% have chosen to be cryopreserved.	(14)