Suddenly I felt dizzy and the world was spinning

Dizziness is a symptom with great impact. It can cause sudden damage to people's life rhythm and cause various unexpected situations. Therefore, many people are very afraid of this phenomenon. There are many reasons for dizziness, including stimulation from external factors and internal body diseases. For example, why do you suddenly feel dizzy? Let’s take a look at the explanation below.

Causes and characteristics of vertigo

Vertigo is the illusion of motion of oneself or surrounding objects caused by spatial positioning illusion. It is a subjective sensory disorder, usually without conscious impairment. If the patient has a sense that the surrounding scenery or himself is rotating, it is called rotational vertigo or true vertigo. If the patient only has dizziness, heavy head and light feet, and a swaying feeling, but no sense of rotation, it is called pseudo-vertigo.

The normal human body is often in motion, and maintaining organic balance requires sound neural regulation. External sensory stimuli are transmitted to the cerebellum and subcortical centers, producing involuntary coordinated reflexes; sensory stimuli can also be transmitted from the subcortical centers to the cerebral cortex, enabling the body to consciously maintain balance. The visual perception system, the positional perception system of muscles and joints, and the vestibular perception system are the three main afferent pathways of the human body's balance regulation reflex, collectively known as the "balance triad." Whether it is the obstruction of the reflex pathway of the balance triad, lesions of the cerebellum and subcortical centers, or dysfunction of the cerebral cortex, it can cause imbalance in the human body and produce vertigo, and lesions of the inner ear vestibular system are the main cause of vertigo. Since the balance triad is also connected to the visceral motor center in the brainstem through the reticular formation, vertigo is often accompanied by a series of visceral nervous system reaction symptoms such as nausea, vomiting, pale complexion, bradycardia and low blood pressure.

Since diseases of the inner ear vestibular system are the main cause of vertigo, vertigo is classified into two categories: vestibular system vertigo and non-vestibular system vertigo; the two are further divided into peripheral vestibular vertigo and central vestibular vertigo.