Conceptual Evolution and Contemporary Definitions of Psychogenic Vertigo The clinical understanding of psychogenic vertigo, a condition characterized by a subjective sensation of imbalance or dizziness in the absence of a primary organic vestibular lesion, has undergone significant transformation over the last century. Historically, this phenomenon was frequently categorized under broad rubrics such as “vestibular neurosis” […]
The Barany Test: Definition, History, and Clinical Applications Introduction The Barany Test, also known as the Rotational Chair Test, is a diagnostic test used to assess vestibular function. It is an objective tool that can be used to identify peripheral vestibular lesions and central vestibular disorders. The Barany Test has evolved from early pioneering work […]
Depression Symptoms & Dizziness: An Overview of the Somatic Manifestation The relationship between psychological distress and physical symptoms is a critical area of study within clinical psychology and neuroscience. While major depressive disorder (MDD) is fundamentally characterized by affective and cognitive disturbances—such as persistent feelings of sadness, anhedonia, and worthlessness—it is increasingly recognized that a […]
Introduction and Definition Labyrinthitis represents an acute inflammatory disorder affecting the delicate structures of the inner ear, specifically the labyrinth. This complex anatomical region houses the organs responsible for both hearing (the cochlea) and balance (the vestibular system, comprising the semicircular canals and the otolith organs). When the labyrinth becomes inflamed, the resulting irritation and […]
Defining Space Adaptation Syndrome (SAS) Space Adaptation Syndrome (SAS), often referred to colloquially as space sickness, represents a complex neurovestibular disorder affecting a significant majority of individuals—estimated to be between 50% and 80%—during their initial exposure to the microgravity environment of spaceflight. This condition is fundamentally a form of severe motion sickness induced by the […]
Definition and Phenomenological Description The concept of the whirl sensation refers precisely to the subjective feeling of rotation or spinning, either of oneself relative to the environment or of the environment relative to oneself. This phenomenon, while often used colloquially to describe generalized dizziness or lightheadedness, is fundamentally rooted in the intricate workings of the […]
Introduction and Definitional Framework Shen-k’uei, often abbreviated as Shen-K, is a profound and intensely studied example of a culture-bound syndrome (CBS) recognized primarily within the fields of transcultural psychiatry and medical anthropology. This condition is characterized by an overwhelming and persistent belief that the individual is losing vital life-sustaining essence through the involuntary or excessive […]
Defining Faintness: A Multifaceted Concept The term faintness possesses a broad spectrum of applications within both medical physiology and sensory perception, demanding careful contextual differentiation for accurate understanding. Fundamentally, in clinical settings, faintness denotes a subjective and often sudden sensation of dizziness, lightheadedness, and profound weakness, frequently serving as a precursor to syncope, or a […]
Introduction to Sopite Syndrome Sopite Syndrome (SS) is a complex physiological and psychological condition that manifests following prolonged exposure to highly realistic, yet synthetic, environments, such as advanced flight simulators, driving apparatuses, or contemporary virtual reality (VR) systems. This syndrome is fundamentally characterized by a cluster of insidious symptoms, which often defy the typical presentation […]
Definition and Clinical Presentation of Kinetosis Motion sickness, clinically termed kinetosis, is a common physiological syndrome characterized by a constellation of unpleasant and debilitating symptoms that arise from exposure to real or perceived motion. This condition is not classified as a disease but rather a temporary, environmentally induced disturbance of the central nervous system’s regulation […]
Dizziness: A Psychological and Physiological Overview The Core Definition and Differentiation Dizziness is a broad, non-specific term utilized in both medical and psychological contexts to describe an array of uncomfortable sensations, primarily encompassing feelings of lightheadedness, unsteadiness, or a subjective sense of spatial disorientation. It is one of the most frequently reported symptoms in clinical […]
Ataxic Feeling Definition and Phenomenology of Ataxic Feeling The term ataxic feeling refers to a profound and highly distressing subjective experience characterized by a sensation of unsteadiness, imbalance, or disorientation, often without observable objective signs of motor incoordination. Unlike Ataxia, which is a measurable neurological sign involving a lack of voluntary coordination of muscle movements, […]
Retrocochlear Hearing Loss: An Encyclopedia Entry The Core Definition of Retrocochlear Hearing Loss (RHL) Retrocochlear hearing loss is a specific type of hearing impairment characterized by a dysfunction of the neural structures located beyond the cochlea, meaning the inner ear itself may be functioning adequately, but the transmission of auditory signals to the brain is […]
Orthostatic Hypotension Introduction to Orthostatic Hypotension Orthostatic hypotension (OH) is a complex physiological condition characterized by a significant and often sudden drop in blood pressure when an individual transitions from a lying or sitting position to an upright stance. This rapid decrease in blood pressure, which is typically defined as a fall of at least […]