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The main functions of the somatosensory system are the perception of external stimuli, the perception of internal stimuli, and the regulation of body position and balance (proprioception). [2] Mechanosensory information includes that of light touch, vibration, pressure and tension in the skin.
Proprioception (sense of joint position) - tested by moving the thumb while the patients eyes are closed. Patient is then asked whether the thumb is moved up or down. Vibration - tested with a 128 Hz tuning fork placed at the first joint of the thumb; Temperature - tested with hot and cold test tubes.
Proprioception was then found to be involved in other tropisms and to be central also to the control of nutation. [79] The discovery of proprioception in plants has generated an interest in the popular science and generalist media. [80] [81] This is because this discovery questions a long-lasting a priori that we have on plants.
The dorsal column–medial lemniscus pathway (DCML) (also known as the posterior column-medial lemniscus pathway (PCML) is the major sensory pathway of the central nervous system that conveys sensations of fine touch, vibration, two-point discrimination, and proprioception (body position) from the skin and joints.
This sensory information is transmitted by the posterior column-medial lemniscus pathway of the spinal cord, which also carries the sensations of fine touch, stereognosis, tactile pressure, graphesthesia, texture recognition, kinesthesia, two-point discrimination, proprioception, and vibration. To test for intact barognosis, a set of small ...
Somatosensation is considered a general sense, as opposed to the special senses discussed in this section. Somatosensation is the group of sensory modalities that are associated with touch and interoception. The modalities of somatosensation include pressure, vibration, light touch, tickle, itch, temperature, pain, kinesthesia. [18]
Touch includes mechanoreception (pressure, vibration and proprioception), pain (nociception) and heat (thermoception), and such information is carried in general somatic afferents and general visceral afferents. [1]
Romberg's test, Romberg's sign, or the Romberg maneuver is a test used in an exam of neurological function for balance. The exam is based on the premise that a person requires at least two of the three following senses to maintain balance while standing: proprioception (the ability to know one's body position in space)