participate

Volunteers Needed for Brain Stimulation and Sleep Study

We are recruiting healthy volunteers for a research study exploring Temporal Interference (TI) stimulation, a new, safe, non-invasive brain stimulation technique. Our aim is to understand how TI stimulation influences memory processes and how stimulation during wakefulness or sleep affects memory consolidation.

What’s involved:

• Complete simple behavioural memory tasks
• Experience state-of-the-art functional brain imaging using MRI
• 1 MRI session and up to 3 nap sessions (approximately 5 hours each)

Compensation:

• £15 per hour for each visit
• Up to £20 for travel expenses per visit

You will have the opportunity to contribute to research to help understand memory function as well as experience cutting-edge neuroscience.

Interested? Please email NSNlab@kcl.ac.uk with ‘Expression of Interest’ as the subject header.

The Role of REM Sleep and its Relation to Brain Function in Humans

What does the study involve?

The study takes place over 5 weeks. The first week involves 7–10 days of at-home sleep assessments, including the use of a variety of sleep/activity measuring devices, cognitive assessments, and questionnaires.

Following this, there will be one adaptation overnight session and 3 extended overnight sessions at the Surrey Sleep Research Centre, each a week apart. Each extended night includes a wide range of sleep measuring devices, questionnaires, and cognitive tasks. During the extended overnight sessions, you will have 2 blood samples taken — one in the evening and one in the morning.

You will also be asked to attend a screening visit, a visit to pick up the equipment for the at-home monitoring, and to return the equipment on the adaptation night.

---

Who is eligible?

To take part, you must be:

• Aged 18–35 or 65–85 years
• Have a BMI below 30
• Registered with a GP

You cannot take part if you:

• Are pregnant
• Have been diagnosed with a significant medical condition, changed medication, or been hospitalised in the past 3 months
• Have a medical condition requiring treatment incompatible with the protocol (e.g. CPAP treatment, administration of medication by someone else)
• Have a medical condition that would make participation unsafe (e.g. poorly controlled diabetes, epilepsy, heart disease)
• Have a previously diagnosed neurologic, psychiatric, or sleep disorder
• Are taking or likely to start medication that may interfere with cognition (e.g. stimulants, antidepressants, neuroleptics)
• Have any severe skin condition, burn, or injury on your scalp or head
• Have had skull surgery or other brain or spinal cord surgery
• Have conducted shift work, maintained an irregular sleep/wake schedule, or travelled through more than 2 time zones in the preceding month
• Have any metal or electronic objects in the upper part of your body (e.g. a pacemaker; dental fillings/implants or earrings are fine)
• Have hearing deficits or use a hearing device
• Have alcohol intake exceeding 28 units per week or are abusing drugs

---

This study offers compensation for participation.

For more information or to express interest, please contact crc-recruitment@surrey.ac.uk.