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Definition
| Resultant of a mechanical deformation (indentation etc, of the skin) |
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Term
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Definition
| Sensory receptors that transduce the mechanical deformations of the skin, into neural signals for the brain. |
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Definition
Slow adapting mechanorecptors.
Merkel cell endings.
Densely arranged near the surface of the skin. |
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Definition
Slow-adapting mechanoreceptor.
Large receptive fields, sparsely distributed, deep within the skin. |
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Definition
Fast adapting.
Meissner corpuscle endings.
Small receptive fields, densely arranged near the surface |
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Definition
Fast adapting.
Pacinian corpuscle endings.
large fields, sparsely, and deeply distributed. |
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Term
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Definition
Specialized endings of SAI mechanorecpetors,
Where transduction takes place. |
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Definition
Specialized endings of FAI mechanorecpeptors.
Where transtduction takes place. |
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Term
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Definition
Specialized endings of FAII mechanorecpetors.
Where transduction takes place. |
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Term
| C-tactile Mechanorecpetors |
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Definition
A type of free nerve ending (mechanorecptor)only present on hairy skin.
Respond to slow, gentle touch, and send signals to insular cortex. |
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Definition
| Perception of the position and movement of body parts. |
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Term
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Definition
Sensory organs,
Provide information about muscle length.
& isometric forces on muscles, for proprioception. |
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Term
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Definition
| Sensory organs that provide information about muscle force (for proprioception). |
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Definition
Sensory organs that provide information about joint angles.
Probably to signal when a joint has reached limit of its normal motion. |
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Definition
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Definition
| Receptors that transduce physical stimuli associated with: damagaing mechanical, thermal or chemical events, incldued among the freee never endings in the epidermous and dermis. |
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Definition
| A mechanism that decreases the response threshold of nociceptors so that low level stimulation can cause pain |
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Term
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Definition
myelinated axons of nociceptors.
Transmit pain signals,
produce rapid response to mechanical stimuli and excessive heat |
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Term
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Definition
| unmyelenated axons of nociceptors that transmit pain signals slowly. |
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Term
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Definition
| Thermoreceptors that fire at an ongoing moderate rate, to skin temperatures between 29-43 Celsius. |
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Term
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Definition
| Thermorecpetors that fire at an ongoing rate in response to temperatures from 17-40 Celsius. |
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Term
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Definition
Dorsal Column medial lemniscal pathway
Pathway for signals involved in tactile perception and proproception.
Travels up spinal-cord on the ipsilateral side... |
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Term
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Definition
| Pathway for signals in nocioception and thermoreception. |
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Term
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Definition
Ventral Posterior Nucleus
A nucleus of the thalamus; par of the DCML pathway, and spinothalamic pathway |
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Term
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Definition
| A region of the cerebral cortex in the anterior parietal lobe |
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Term
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Definition
Primary somatosensory cortex
First area to receive somatosensory signals from the ventral posterior cortex.
Divided into four strips (3a,3b,1,2) |
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Term
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Definition
Secondary somatosensory cortex
A subreigon of hte somatosensory cortex.
Recieves signals from the S1. |
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Term
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Definition
A mapping of the body surface onto the somatosensory cortex.
Adjacent locations on cortex, receives signals from adjacent locations on the body. |
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Term
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Definition
Compounds belonging to the opiates class.
Released in response to pain/stress. |
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Term
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Definition
| Endogenous opioids that have an inhibitory effect on pain-related neural signals. Reducing the perceived intensity of pain. |
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Term
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Definition
Using touch to perceive and identify objects.
Combines tactile, proprioeption, and thermorecption information. |
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Term
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Definition
| Results from damage to Parietal Cortex, especially S2. |
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Definition
| Sense organs, used to produce neural signals carrying information about balance and acceleration. |
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Term
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Definition
Part of vestibular system.
three perpendicular, hollow curved tubes in the skull, filled with endolymph. Responsible for signalling head rotation. |
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Term
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Definition
Part of vestibular system.
Consists of utricle and saccule.
Responsible for signalling if head is undergoing linear acceleration or being held in tilted position. |
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Term
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Definition
| Unconscious compensating movement of the eyes during head movements, to maintain a stable gaze. |
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