[Pt2024] Happy Thanksgiving Comparative Anatomy!!

[Lillemon-Caberwal, Tara L]

Hello Everybody!

Hold onto your turkey drumsticks! Let's quickly discuss the similarities and differences between you and that unlucky turkey you are about to eat!
Did you know....

  *   The turkey's wings are similar to your own personal wing-span of your arms.
  *   The collarbone of the bird is fused for stability and is called the 'furculum'. But us humans refer to this bone as the coveted 'wishbone' that we all fight over at the end of dinner. Thank goodness our SCJ is not fused, as this is a pivotal joint to allow overhead motion without compression along the brachial plexus!
  *   The pectoral girdle of the bird is a major support system for the wings of the bird. The large sternum is positioned under the body to allow the large flight muscles (we know them as the pectoral muscles) to attach to them. Unfortunately for us humans, no matter how much bench press you perform, your chest will never be big enough to allow you to take flight!
  *   Both the turkey and humans each have a 4-chamber heart. So remember, birds have feelings too!
  *   Our human bones are dense and consist of bone marrow, which is contrasted to the hollow bones of birds. This allows air to flow into their bones, thus increasing the oxygen supply to the tissues and a lighter mass for flight.
  *   The tibias of both humans and turkeys contain roughly the same bumps and grooves, in the same locations. During fetal development, the tibias originate and develop in a similar fashion. However, that's where the similarities end, as humans have joint articulations between the tibia/fibula, and turkeys have a fused tib/fib. This is also known as the Drumstick!!


So, today, be thankful for the sellar-shape of your thumb's CMC joint, which allows for thumb opposition to grasp that turkey drumstick!! Combine the functionality of your hand with the elbow flexion, that requires an anterior glide of the humero-ulnar joint (roll/slide same) to bring that turkey drumstick up to your mouth. And lastly (Lenon this one's for you), make sure to supinate that forearm to accurately position that drumstick in your mouth. I will let you review the roll/slide at the radio-ulnar joint for supination....

(pop quiz....which carpal bone articulates with the thumb's MC???!)

Happy Thanksgiving and hit those flashcards!!!

-Dr. Cab

_________________________________________
Tara Caberwal, PT, DPT, DSc |  Campbell University
Fellow of the American Academy of Orthopaedic Manual Physical Therapists
Board Certified Orthopaedic Specialist

Assistant Professor - Doctor of Physical Therapy Program
College of Pharmacy & Health Sciences
*: caberwal at campbell.edu<mailto:caberwal at campbell.edu>
Tracey F. Smith Hall, room 318E
4150 US 421 South
Lillington, NC 27546

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