The alien hand syndrome (AHS) is a fascinating movement disorder. Patients
with AHS experience one of their limbs as alien, which acts autonomously and
performs meaningful movements without being guided by the intention of the
patient. Here, we report a case of a 74-years old lady diagnosed with an
atypical Parkinson syndrome by possible corticobasal degeneration. The patient
stated that she could not control her right hand and that she felt like this
hand had her own life. We tested the patient for ownership illusions of the
hands and general tactile processing. Results revealed that when blindfolded,
the patient recognized touch to her alien hand only if it was presented
separated from touch to the other hand (bilateral asynchronous touch).
Delivering touch synchronously to both the alien and the healthy hand resulted
in failure of recognizing touch to the alien hand (bilateral synchronous
touch). Thus, AHS here co-existed with right-sided tactile extinction and is
one of only very few cases in which the alien hand was felt on the right side.
We discuss the results in the light of recent research on AHS.
alien hand syndrome
600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit
A Case of Right Alien Hand Syndrome Coexisting with Right-Sided Tactile
Front. Hum. Neurosci. - 10 (2016), Artikel Nr. 105
Charité - Universitätsmedizin Berlin