Abstract: An apparatus for collecting a saliva sample is described herein. In a described embodiment, the apparatus comprises a filter; and a pressure generator operable to generate pressure to cause the saliva sample to be transferred through the filter, the filter being configured to reduce a viscosity of the saliva sample as the saliva sample is transferred through the filter. A method collecting a saliva sample from a user is also described, among other aspects.

Abstract: An implantable guide element comprises a main body formed from a biocompatible material. One or more grooved surface structures are provided on and/or within the main body, each grooved surface structure comprising one or more grooves for directionally guided growth of fibro-axonal tissue. At least one of the one or more grooved surface structures may form a channel along or within the main body, within which an electrode is disposed in spaced relationship from a wall of the channel along at least part of its length.

Abstract: A cognitive training platform comprises at least one processor that is configured to: obtain a cognitive response function for a user that represents a cognitive state, or change in cognitive state, as a function of one or more stimulus parameters of a stimulus to which the user is exposed; expose the user to a first stimulus that is characterized by respective first values of the one or more stimulus parameters; determine, based on at least one sensor measurement, first cognitive performance values indicative of a response to the first stimulus; determine, using the cognitive response function, respective second values of the one or more stimulus parameters that will result in at least one improved cognitive performance value relative to the first cognitive performance values; and expose the user to a second stimulus that is characterized by the respective second values of the one or more stimulus parameters.