Sometimes, there is a need to record and analyse multiple human brains simultaneously. Instead of studying an individual’s brain, hyperscanning allows scientists and researchers to dive deeper into the neural dynamics of a pair or a group of people involved in a social interaction.
Hyperscanning techniques and BCI technologies are becoming more and more popular in the neuroscience field. The main reason behind this popularity is the ever increasing amount of researchers getting interested in knowing how social interactions can impact mental states.
However, hyperscanning isn’t an easy study to establish. Scientists need to overcome plenty of challenges. They are still looking for enhanced ways to accurately capture, analyse and understand the complex data that BCI technologies generate.
This comprehensive article digs deeper into the world of hyperscanning to provide you with techniques being used. Read on to discover more.
Modalities Scientists Use for Hyperscanning
In most cases, hyperscanning can include a combination of various neuroimaging techniques. They include:
- Electroencephalography (EEG)
- Functional magnetic resonance imaging (fMRI)
- Functional near-infrared spectroscopy (fNIRS)
Each of these modalities features drawbacks and strengths, which vary. For example, fMRI can capture very detailed functional images of the human brain. However, it is very slow. Its working rate is approximately one measurement every two seconds.
On top of that, the machinery is bulky, meaning it isn’t a perfect option for capturing and analysing real-time social interactions. Such interactions, in most cases, need more movement and impulsiveness.
That’s where modalities such as EEG and fNIRS come in. These methods can quickly and accurately record brain activity. Also, they can be mobile, making them better for studying real-time social interactions.
Of all these three techniques, Electroencephalography (EEG) is the most popular. So, how does EEG provide hyperscanning? Let’s discover more.
Why Is Electroencephalography (EEG) the Tool of Choice for Hyperscanning?
Hyperscanning’s main assumption is known as inter-brain synchrony. With this assumption, scientists expect the brain oscillations’ alignment when two brains of different individuals interact socially. Electroencephalography (EEG), by definition, captures the oscillations of the brain. This makes the likes of the BrainAccess EEG kit an ideal tool to explore inter-brain synchrony.
Electroencephalography (EEG) is among the most powerful BCI technologies for general non-invasive brain activity monitoring. When the neurons populations simultaneously fire in the cortex, they trigger brain oscillations. These oscillations are captured by Electroencephalography (EEG) as the neurons fire electrical impulses.
Another vital aspect is mobility. Portable EEG devices, including the BrainAccess EEG kit, are easy to carry, making them ideal for real-time social settings. Hyperscanning with Electroencephalography (EEG) is a preferred technique thanks to its capability to capture brain oscillations and offer a high temporal resolution.
