Neck flexion with Jeduk V4
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Hi,
I would like to model flexion of the neck for magnetic cervical spinal cord stimulation, with the Jeduk V4 model. However, it seems that only the head/skull can be rotated, and the spine seems to be static. Could you provide some suggestions on whether this is possible please?
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Only two joints are posable in Jeduk V4.
According to Physiopedia, approximately 50 percent of the rotation in the cervical spine happens between C1 and C2. Similarly, about 50 percent of flexion and extension happen between the skull (occiput) and C1. Therefore, we decided to limit the rotation to the joints between the occiput and C1, and between C1 and C2.
We are considering adding more "poser joints" in all models though. Would you need more flexion/extension or rotation between C3-C2 or even lower?
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Dear @bryn , thank you so much for the prompt and informative response.
When I select C1 vertebrae in the poser, only rotation about the z axis is possible.
My application requires a posture very similar to the flexion example in the image you've attached. It does seem that, perhaps at least flexion about C6 is also involved in this particular posture, and C3-C5 seem to contribute very little to this pose.
Could you kindly advise if there is any way to achieve this level of flexion with the current Jeduk V4 model, please? We require this pose particularly to allow for placing the coils flush to the skin, and the spinal nerve root orientation relative to their distal projections will also change due to this flexion posture, which we are trying to recreate with the model. -
I see the limitation. I will discuss if we can add more degrees of freedom to Jeduk (and subsequently other ViP posable models).
With the current model, a flexion of 20 degrees seems acceptable. More rotation and the chin starts to strongly self-intersect with the neck (see screenshot and the attached posture file).
Posture file: please rename the extension to .pose:
Jeduk_flexion.pose.txt -
@bryn Thank you again for your reply and the posture file!
