Both Mama and Papa have conventional mirror cells
with three large knurled collimation knobs and three narrower but longer locking knobs.
They also showed that specific subsets of mirror cells
increased their activity during the execution of an action but decreased their activity when an action was only being observed.
These neurons and another group located elsewhere in the premotor cortex have been dubbed mirror cells
For example, if you see someone showing disgust, mirror cells
in your own "disgust" brain module are activated, giving you a faint feeling of disgust yourself.
Other clever ATMs will find even more ingenious ways to utilize these concepts to create new mirror cells
Buying a ready-made mirror and other components (focuser, mirror cells
, tube, etc.
Chris's scope neatly avoids the need for awkward front-end adjustable mirror cells
found in the collimation systems of other ball-and-socket designs.
Toshimi Taki wrote Plate, the first FEA program for analyzing amateur-made mirror cells
(S&T: September 1994, page 84, and April 1996, page 75).
Made with resilient, air-cushioned foam, it provides a simple alternative to the hardware used in conventional mirror cells
Most mirror cells
have three adjustment screws or three pairs of push-pull adjustments.
Howard's Standard Handbook for Telescope Making and is one of a family of "double plate" mirror cells
Suspecting that the mirror supports might also be responsible, I disassembled the Orion and Bushnell mirror cells