Acquired Neurosensory Dysfunction evaluated with Neurolign tests

Acquired Neurosensory Dysfunction evaluated with Neurolign tests

In 2016-2017, diplomatic personnel and their families in Havana, Cuba reported dizziness, ear pain, tinnitus and cognitive complaints that emerged after the perception of high-frequency noise and/or pressure sensations [1, 2]. These patients were believed to have suffered from an acquired neurosensory dysfunction and are referred to as the ‘Havana affected patients’.  Some of their symptoms are similar to those experienced in mild traumatic brain injury (mTBI). This novel research [1] used pupillary light reflex and vergence test coupled with measurements of pupil diameter to evaluate neural deficits in ‘Havana affected patients and patients with acute mTBI. The results demonstrate that these tests are able to distinguish with high accuracy (>91%) between these groups. The findings are important for the management and rehabilitation of the Havana affected patients. The results also suggest that although symptoms overlap with mTBI symptoms, the affected underlying neural pathways are different. In summary, this research illustrates the sensitivity of the oculomotor tests using Neurolign technology in differentiating between two neurological conditions that present with overlapping symptoms.

To learn more about eye-tracking methods contact Neurolign at 1-800-895-7405.


1 Carey D. Balaban, Mikhaylo Szczupak, Alexander Kiderman, Bonnie E. Levin and Michael E. Hoffer, 1. Distinctive Convergence Eye Movements in an Acquired Neurosensory Dysfunction. Front. Neurol., 16 June 2020. doi: 10.3389/fneur.2020.00469

2 Michael E. Hoffer, Bonnie E. Levin, Hillary Snapp, James Buskirk, and Carey Balaban, Acute findings in an acquired neurosensory dysfunction. Laryngoscope Investig Otolaryngol. 2019 Feb; 4(1): 124–131. doi: 10.1002/lio2.231