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The lacrimal canaliculi have a mucosa composed of a non-keratinized stratified squamous epithelium on a basement membrane and a highly elastic lamina propria.Surrounding the mucosa are skeletal muscle fibres continuous with the orbicularis oculi which forms a sort of sphincter.
The lacrimal apparatus is the physiological system containing the orbital structures for tear production and drainage. [3] It consists of: The lacrimal gland, which secretes the tears, and its excretory ducts, which convey the fluid to the surface of the human eye; it is a serous gland located in lacrimal fossa. It is a j-shaped gland;
The vestibulo-ocular reflex is a reflex eye movement that stabilizes images on the retina during head movement by producing an eye movement in the direction opposite to head movement in response to neural input from the vestibular system of the inner ear, thus maintaining the image in the centre of the visual field. For example, when the head ...
The visual system is the physiological basis of visual perception (the ability to detect and process light).The system detects, transduces and interprets information concerning light within the visible range to construct an image and build a mental model of the surrounding environment.
The eyes are always affected, and most people have impaired vision. During an eye examination, areas with less pigment (retinal lacunae) appear as white spots in the fundus, which is due to the absence of retinal pigment cells and other structures in these areas. If the lacunae are located in the macula, they affect acuity.
The vestibular system. Berlin: Springer. ISBN 978-0-387-98314-1. OCLC 56068617. (Comment: A book for experts, summarizing the state of the art in our understanding of the balance system) Lawson, Ben D; Rupert, Angus H; Kelley, Amanda M. "Mental Disorders Comorbid with Vestibular Pathology". A preview of an article on how vestibular disorders ...
The visual system is organized hierarchically, with anatomical areas that have specialized functions in visual processing. Low-level visual processing is concerned with determining different types of contrast among images projected onto the retina whereas high-level visual processing refers to the cognitive processes that integrate information from a variety of sources into the visual ...
This constitutes the so-called capsule of the space. Each lacuna is generally occupied by a single cell, but during the division of the cells, it may contain two, four, or eight cells. Lacunae are found between narrow sheets of calcified matrix that are known as lamellae (/ l ə ˈ m ɛ l i / lə-MEL-ee).