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Verruca
Verruca A wart.
RELATED TERMS--------------------------------------
Wart
A small, hard, abnormal growth of the skin or mucous membranes caused by a virus.
SIMILAR TERMS--------------------------------------
Verrucous
Rough; wart-like.
PREVIOUS AND NEXT TERMS--------------------------------------
Visual angle
A measurement of the area of the retina in degrees subtended by a stimulus. Roughly speaking the width of one's thumb at arm's length is approximately 2 degrees.
Visual phosphene
The visual perception resulting from non-photopic stimulation such as electrical stimulation of the cortex or pressing on the eyeball. Brinkdley & Lewin 1968) and Bak et al (1990) have shown that stimulation of the cortex produces visual pherceptions.
Vitreomacular traction syndrome
A traction-induced visual deficit in which partial posterior vitreous detachment is present in combination with persistent macular adherence.
V5a
Seems to be involved in visually tracking moving target. Projects along with Middle Temporal Area (MT) to the dorsolateral pontine nuclei in the brain stem.
V5
Characterized by strong motion-directionally sensitive neurons with large receptive fields organized into columns. Some neurons respond to the whole rather than the component motion of moving plaid patterns. Implicated in the analysis of movement, and stereoscopic depth. Receives input from layer 4B in V1 and thick stripes in V2. Projects to Medial Superior Temporal Area (MST).
Verruca
Verrucous
Rough; wart-like.
Viscous
Thick, coagulated; sticky or gummy.
Verbigeration
Stereotyped and seemingly meaningless repetition of words or sentences.
Visual hallucination
A hallucination involving sight, which may consist of formed images, such as of people, or of unformed images, such as flashes of light. Visual hallucinations should be distinguished from illusions, which are misperceptions of real external stimuli.
Voyeurism
Peeping; one of the paraphilias, characterized by marked distress over, or acting on, urges to observe unsuspecting people, usually strangers, who are naked or in the process of disrobing, or who are engaging in sexual activity.
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