Eye movements during the performance of the neuropsychological Trail Making Test

The Trail Making Test (TMT) is a neuropsychological test to assess cognitive impairment. Although it is widely used in clinical practice, it presents some limitations such as the lack of timeliness. The oculomotor system is altered with cognitive impairment; thus, the objective of this work was to study whether the analysis of eye movements during the test can provide further information for an earlier diagnosis. Five healthy participants were recruited the study and performed the TMT while their eye movements were recorded. The results showed relations between saccadic and fixational parameters and time to completion, suggesting the potential of eye tracking technology to complement the test and potentially overcome its limitations.