This condition is most commonly acquired by those handholding large lenses such as at air shows and when photographing birds in flight. As the focal length gets longer, so do the shoulder tendons. The symptoms are sharp, as in sharp pain. A secondary shoulder injury comes from carrying said ...
and together we hatched a plan to survey the cadavers in the anatomy lab for all of the variant and supernumerary muscles in the lower leg and foot. (Emphasis onleg and foottogether — we were looking
and found that it was present in all soaring taxa, where it evolved at least 7 times, but absent in non-soarers. Furthermore, the SPD is in the right place to improve the mechanical advantage of the pectoralis muscles,
Basically these are muscles, joints and tendons, which undergo changes in position when a person touches an object or surface. For example, when a person presses a finger into a cake to see if it is cooked, the position of the muscles, tendons and joints of that finger vary with the ...
These long cervical ribs are ossified tendons of ventral neck muscles, presumably longus colli ventralis. We know they’re ossified tendons because of their bone histology (Klein et al. 2012), and we suspect that they’re longus colli ventralis because those tendons look the same in birds, jus...
These long cervical ribs are ossified tendons of ventral neck muscles, presumably longus colli ventralis. We know they’re ossified tendons because of their bone histology (Klein et al. 2012), and we suspect that they’re longus colli ventralis because those tendons look the same in birds, jus...
Birds make it easier to move their legs by lightening them: shifting the muscles proximally and operating the legs via tendons. (I assume that if we could see the behind the feathers of the flamingo, we’d see a similar, though smaller, “drumstick” at the top of the tibiotarsus.) Li...
Epipophyses are muscle attachment points dorsal to the postzygapophyses, for the insertion of long, multi-segment epaxial (dorsal) neck muscles in birds and other dinosaurs. I know that they turn up occasionally in non-dinosaurian archosaurs, and possibly in other amniotes, but for the purp...
I know that they turn up occasionally in non-dinosaurian archosaurs, and possibly in other amniotes, but for the purposes of this post I’m only considering their distribution in sauropods. For some quick background info on epipophyses and the muscles that attach to them, see the second ...
It’s hard to say how important this factor is, but I note that almost all the anatomical variants I’ve helped students present at conferences or publish are things that they found in complicated areas – nerve plexuses, bundles of tendons crossing a joint, and so on – where they could...