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They are sensitive to shape and textural changes in exploratory and discriminatory touch. Their acute sensitivity provides the neural basis for reading Braille text. Because of their superficial location in the dermis , these corpuscles are particularly sensitive to touch and vibrations, but for the same reasons, they are limited in their ...
Merkel cells, also known as Merkel–Ranvier cells or tactile epithelial cells, are oval-shaped mechanoreceptors essential for light touch sensation and found in the skin of vertebrates. They are abundant in highly sensitive skin like that of the fingertips in humans, and make synaptic contacts with somatosensory afferent nerve fibers.
Hypoesthesia or numbness is a common side effect of various medical conditions that manifests as a reduced sense of touch or sensation, or a partial loss of sensitivity to sensory stimuli. In everyday speech this is generally referred to as numbness. [1]
Merkel nerve endings provide information on pressure, position, and deep static touch features such as shapes and edges. They are tactile sensors in the business of mechanotransduction. They encode surface features of touched objects into perception, but also have to do with proprioception. [5]
Fine touch (or discriminative touch) is a sensory modality that allows a subject to sense and localize touch. The form of touch where localization is not possible is known as crude touch. The dorsal column–medial lemniscus pathway is the pathway responsible for the sending of fine touch information to the cerebral cortex of the brain.
Two-point discrimination (2PD) is the ability to discern that two nearby objects touching the skin are truly two distinct points, not one.It is often tested with two sharp points during a neurological examination [1]: 632 [2]: 71 and is assumed to reflect how finely innervated an area of skin is.
Haptic technology (also kinaesthetic communication or 3D touch) [1] [2] is technology that can create an experience of touch by applying forces, vibrations, or motions to the user. [3] These technologies can be used to create virtual objects in a computer simulation , to control virtual objects, and to enhance remote control of machines and ...
A finger is a prominent digit on ... of touch receptors and thermoreceptors among all areas of the human skin, [17] making them extremely sensitive to ...