Related topics: brain

Robot 'shadow hand'

Picking up an apple is one of those jobs requiring the delicate touch of the human hand – or its robotic counterpart.

Force sensor integrated into surgical forceps

Samsung's Device and System Research Center present a force sensor integrated into surgical forceps to provide surgeons with a sense of touch in robotically-assisted procedures.

Touch to feel the virtual world (w/ Video)

Haptic technology, which simulates the sense of touch through tactile feedback mechanisms, has been described as "doing for the sense of touch what computer graphics does for vision." Haptics are already common in devices ...

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Somatosensory system

The somatosensory system is a diverse sensory system comprising the receptors and processing centres to produce the sensory modalities such as touch, temperature, proprioception (body position), and nociception (pain). The sensory receptors cover the skin and epithelia, skeletal muscles, bones and joints, internal organs, and the cardiovascular system. While touch is considered one of the five traditional senses, the impression of touch is formed from several modalities; In medicine, the colloquial term touch is usually replaced with somatic senses to better reflect the variety of mechanisms involved.

The system reacts to diverse stimuli using different receptors: thermoreceptors, mechanoreceptors and chemoreceptors. Transmission of information from the receptors passes via sensory nerves through tracts in the spinal cord and into the brain. Processing primarily occurs in the primary somatosensory area in the parietal lobe of the cerebral cortex.

At its simplest, the system works when a sensory neuron is triggered by a specific stimulus such as heat; this neuron passes to an area in the brain uniquely attributed to that area on the body—this allows the processed stimulus to be felt at the correct location. The mapping of the body surfaces in the brain is called a homunculus and is essential in the creation of a body image.

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