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SOMATOSENSATION (SENSATION FROM SKIN (SUPERFICIAL) (Chemoreceptors: pain…
SOMATOSENSATION
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SOMATOSENSORY SYSTEM
Term used to describe the transfer of sensory information from the skin and musculoskeletal systems (see previous slide for detail)
Most somatosensory information is not consciously perceived – rather it is processed at spinal level (in local neuron circuits) or by the cerebellum (to adjust movements & posture)
SENSORY PROCESSING
Interpreting light touch, pressure, temperature, pain & vibration through skin contact/receptors
Sensory processing is the interpretation of the sensory information from the skin or from the muscles (as described on previous slide)
If this interpretation does not happen effectively e.g. for the hand, can result in:
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Difficulty to determine the amount of force used to grip objects - slip from grasp/crush or squash more delicate items
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SENSORY PATHOLOGY
Disease or injury could be due to damage to sensory receptors, spinal nerves, spinal cord tracts, brainstem, thalamus or cortical areas and depending on the area of damage, can result in
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Loss of sensation - Can be caused by interruption anywhere along sensory pathway; extent and severity depends on mechanism damaged and location of lesion/injury