Giddiness - sensation of patients of its rotation most either subjects surrounding it or feeling of falling, instability of the floor leaving from under legs.

The similar rotatory vertigo is characteristic for a lesion of vestibular receptors, a vestibular nerve or its kernels in a brainstem. As a rule, the rotatory vertigo is accompanied by a nausea, a vomiting raised by a sweating, change of a pulse rate, fluctuations of arterial pressure. Attacks of a rotatory vertigo proceed from several minutes till many o'clock. Besides subjective frustration and vegetative disturbances, the nystagmus is quite often found out. The ring in an ear or specifies depression of hearing dependence of a giddiness on damage of peripheric elements of vestibular system. The rotary giddiness is especially sharply expressed at a direct injury of a labyrinth - an inflammation, a trauma, an ischemia, an edema. The giddiness caused by an organic lesion of a brain, is quite often combined with a diplopia, paresises of oculomotor muscles, bulbar signs. The nystagmus thus happens to constants and can be horizontal, vertical, rotary or diagonal.

Giddinesses are characteristic also for neurotic conditions. Similar psychogenic giddinesses are described by patients rather vaguely: sensation of swaying at standing and walking, feeling of intoxication, gravity in a head. As a rule, it is accompanied also with other neurotic signs.