Two new illusions of the tongue.
New illusions resulting from failures in proprioception are described. The Forked Tongue illusion results from weaving the tongue among the prongs of a fork, or from using the prongs of a fork to distort skin on other parts of the body-in these cases, the prongs feel misaligned even though the fork has not bent. The Tongue Twister illusion results from turning the tongue upside down and probing it with a finger or foreign object-the object can be felt to be in the wrong spatial location, opposite to where it actually is on the tongue.
Egeth
Marc
M
The Children's Hospital of Philadelphia, Department of Radiology/Neuroradiology, 3400 Civic Center Blvd, Philadelphia, PA 19104, USA. egeth@email.chop.edu
D006801:Humans; D007088:Illusions; D010465:Perception / Q000502:physiology*; D011601:Psychophysics; D014059:Tongue; D014110:Touch / Q000502:physiology*