Related Experiment Video
Updated: Feb 8, 2026

Head Implants for the Neuroimaging of Awake, Head-Fixed Rats
Published on: September 7, 2022
Parallel Behind Your Head
Astrid M L Kappers1, Aytun Ö R Çetinkaya1, Giulio S Tan1
1VU Amsterdam, the Netherlands.
Abstract:
A miniature hair clip set-up presented to the first author gave inspiration for this study. After a number of studies investigating what is haptically perceived as parallel on horizontal, frontoparallel or midsagittal planes, the present study focusses on what is felt as parallel behind your head. The results show convincingly that also in this condition physically parallel is not the same as haptically parallel. Moreover, the deviations are large, idiosyncratic and in a direction predicted by assuming a biasing influence of an egocentric reference frame.
Related Concept Videos
Parallel Resonance
Parallel Processing
Resistors In Parallel
Series and Parallel Capacitors
First, consider capacitors connected in series to a battery. In this configuration, the plate connected to the battery's positive terminal develops a positive charge, while the plate attached to the negative terminal becomes negatively charged. An equal magnitude of charge is induced on the...
Parallel-axis Theorem
Muscles that Move the Head
The bilateral sternocleidomastoid, or SCM, and the suprahyoid and infrahyoid muscles are significant head flexors. The SCM muscles originate at the sternum and clavicle and attach to the mastoid process of the temporal bone. The SCM contracts bilaterally to bend the head forward, whereas...

