The hand is composed of 38 bones. There are 28 phalanges (finger bones) and 10 metacarpal bones. Each finger has 3 phalanges and the thumb has 2. There are synovial joints between the metacarpals and the phalanges, which are covered with articular cartilage. The anatomy of the hands is so...
Low impact means that the user will feel less stress on their joints than if they were walking or running for example. The reason for this is that the treadmill doesn’t actually move. Instead, you use your own body weight to get the job done. This means that the forces being exerted ...
Nothing too serious here, just a fun shot I got while in the collections at BYU this past week. TheBrachiosauruselement is metacarpal 1 (thumb column) from BYU 4744, the Potter Creek material. I highlighted my own metacarpal 3. There is a metacarpal 3 from this specimen, but I didn’t...
Wedel and Atterholt (2023) on expanded neurocentral joints in sauropods Aureliano et al (2023) on pneumaticity in Macrocollum Taylor et al. (2023) on the Concrete Diplodocus of Vernal Aureliano et al (2022) on vertebrae of early saurischians Taylor and Wedel (2022) on vertebral orientation...
I've often complained about Sony's larger lenses uncomfortably impacting my first two fingers' (non-cushioned) joints (I have medium-large hands). In side-by-side comparisons using the Sony FE 135mm F1.8 GM Lens, I'm cannot conclusively say that the new grip increases the clearance. Aga...
As a rule of thumb, below 3 times as many characters as taxa I wouldn’t publish. You can never have enough taxa according to the same simulation studies (and also my limited experience, and Mickey’s less limited one). For parsimony (but not likelihood or Bayesian analysis!!!), missing...
I also wonder how intelligence might affect the postcranial skeleton. A prehensile whiplash tail suggests itself. How about a mobile thumb instead of just a thumb claw on the forefoot, or is that too blatantly primate-like? If they were diplodocids, perhaps they would pick up interesting obj...
So we don’t need to add any space for cartilage to the summed minimum (without condyle) lengths–there certainly was cartilage between the surfaces of the condyles and cotyles, because that’s how intervertebral joints work, but there was not enough to push the condyles back outside the ...
Look, I’m not saying it isn’t ridiculous; I’m just saying this seems to be more or less where the evidence is pointing. We’ve made a big deal about howthe necks of apatosaurines were more or less triangular in cross-section, rather than round as has often been assumed; perhaps...
Wedel and Atterholt (2023) on expanded neurocentral joints in sauropods Aureliano et al (2023) on pneumaticity in Macrocollum Taylor et al. (2023) on the Concrete Diplodocus of Vernal Aureliano et al (2022) on vertebrae of early saurischians Taylor and Wedel (2022) on vertebral orientation...