„Visual snow“

[Psychosomatic aspects in otorhinolaryngology-historical milestones]

BACKGROUND

This investigation examined the development of psychosomatics in the field of otolaryngology in Germany using the examples of psychogenic deafness and chronic tinnitus by means of literature research. The focus of the study was on the period 1948-2022.

METHODS

A literature search was carried out in the PubMed database from 1948 and antiquarian ENT textbooks were evaluated. The search terms used were "ENT and psychosomatics," "tinnitus," "retraining therapy," "analytical psychology," "behavioral therapy," and "sensory systems."

RESULTS

Psychosomatic phenomena were mentioned in the treatment of nasal diseases and ear ailments in writings of Byzantine and medieval medicine. Even older are references to tinnitus in ancient Egyptian and Indian scripts. From the nineteenth to the mid-twentieth century, psychological abnormalities in ENT symptoms were assigned to the term hysteria. From the middle of the twentieth century, a paradigm shift in the assessment of psychosomatic disorders in otolaryngology became apparent. In the 1950s, a broad psychosomatic discussion was opened in individual lectures and book contributions on mental abnormalities in ENT diseases. With the implementation of the Psychosomatics Working Group of the German Society of Otorhinolaryngology, Head and Neck Surgery, psychosomatics in the field of ENT received the framework for scientific and clinical activity at the turn of the millennium. Psychosomatics is scientifically represented and part of the continuing education regulations for otolaryngology in Germany and at European level. It shows high standards in research, qualification of otolaryngologists, and patient care.

CONCLUSION

As of 2022, psychosomatics in otolaryngology has been steadily developing for over 70 years. The standards achieved are to be further expanded and research on cognition, affectivity, and sensory analogies intensified.

Visual Snow Syndrome as a Network Disorder: A Systematic Review

Aim: By reviewing the existing clinical studies about visual snow (VS) as a symptom or as part of visual snow syndrome (VSS), we aim at improving our understanding of VSS being a network disorder. Background: Patients with VSS suffer from a continuous visual disturbance resembling the view of a badly tuned analog television (i.e., VS) and other visual, as well as non-visual symptoms. These symptoms can persist over years and often strongly impact the quality of life. The exact prevalence is still unknown, but up to 2.2% of the population could be affected. Presently, there is no established treatment, and the underlying pathophysiology is unknown. In recent years, there have been several approaches to identify the brain areas involved and their interplay to explain the complex presentation. Methods: We collected the clinical and paraclinical evidence from the currently published original studies on VS and its syndrome by searching PubMed and Google Scholar for the term visual snow. We included original studies in English or German and excluded all reviews, case reports that did not add new information to the topic of this review, and articles that were not retrievable in PubMed or Google Scholar. We grouped the studies according to the methods that were used. Results: Fifty-three studies were found for this review. In VSS, the clinical spectrum includes additional visual disturbances such as excessive floaters, palinopsia, nyctalopia, photophobia, and entoptic phenomena. There is also an association with other perceptual and affective disorders as well as cognitive symptoms. The studies that have been included in this review demonstrate structural, functional, and metabolic alterations in the primary and/or secondary visual areas of the brain. Beyond that, results indicate a disruption in the pre-cortical visual pathways and large-scale networks including the default mode network and the salience network. Discussion: The combination of the clinical picture and widespread functional and structural alterations in visual and extra-visual areas indicates that the VSS is a network disorder. The involvement of pre-cortical visual structures and attentional networks might result in an impairment of "filtering" and prioritizing stimuli as top-down process with subsequent excessive activation of the visual cortices when exposed to irrelevant external and internal stimuli. Limitations of the existing literature are that not all authors used the ICHD-3 definition of the VSS. Some were referring to the symptom VS, and in many cases, the control groups were not matched for migraine or migraine aura.

[Auditory phenomena as differential diagnostics to tinnitus]

INTRODUCTION

In the auditory system, subjective tinnitus is known as phantom perception. Humans also report illusionary misperceptions of real listening impressions and complex scene-like acoustic fantasies without external hearing stimulus. The exact pathophysiological relationships of the auditory phenomena are still unclear. Important comorbidities include hearing loss, brain disease and mental disorders.

METHODS

In a literature search in the PubMed database, publications were evaluated until March 2021 on the search terms tinnitus, palinacousis, pareidolia, synesthesia, aura, acoustic hallucination with regard to similarities and differences to subjective tinnitus.

RESULTS

Subjective tinnitus can occur together with other auditory phenomena in an individual. Diagnostically important is the relationship between hearing loss and tinnitus as well as between tinnitus and hearing loss in the corresponding frequency range. With hearing loss, other auditory phenomena may occur.

CONCLUSION

The occurrence of various auditory phenomena simultaneously in a person suggests an auditory perceptual continuum with common physiological processing structures. People with hearing loss should be asked about the various auditory phenomena. For all auditory phenomena, audiometric examination should be part of the diagnostic standard.