Imagine that you are posing while resting on a small, narrow platform that only supports your trunk, neck and head. You are in a horizontal, supine, position. Your limbs are arranged as described below and you have to contract appendicular skeletal muscles to keep them that way, against the force of gravity.
Arrangement of the limbs:
- Hands and fingers are flexed
- Forearms are pronated
- Forearms are extended at the elbow
- Arms are vertical (at a 90 degree angle from your trunk)
- Thighs are horizontal and adducted
- Legs are horizontal (extended)
- Feet are dorsiflexed
- In addition, to facilitate the position of your upper limbs, your shoulder blades are adducted (retracted).
The assignment: Name and describe the prime mover appendicular muscles (see) or most important appendicular muscle groups (if there are/is no prime mover(s)) necessary to maintain this pose and the innervation of the muscles (see Tables in Tortora Ch. 11 and 17 for innervation of muscles).
- Organize your description by the appendicular joint(s) at which movement of the relevant body part occurs.
- There should be 8 paragraphs in your essay, 7 of which correspond to the muscle actions necessary to maintain the pose at the following appendicular joints (include innervation for each muscle!).
- Fingers/wrist (gross movements caused by forearm muscles – don’t include intrinsic hand muscles)
- Distal & proximal radioulnar joints
- Ankle (talocrural joint)
- The 8th paragraph should be a description of the muscles involved in maintaining the position of the scapulae during the pose, plus the nerves that innervate them.
I will provide the text for the Tortora Chapters 11 and 17 as well as the powerpoint that needs to be used. If. you are to use outside sources which I do not recommend but if you need to please create a citation for them .
Here are two different links for the two different chapters that I copy and pasted from our online textbook https://docs.google.com/document/d/1NsgYIaIBnLlVzg…
If you have any questions feel free to ask and I will try to provide as much support as I can