Domain: Healthcare — Anthropotomy
Target concept: Cervical Morphological Features

Video generation prompt: A set of cervical vertebrae (C1–C7) is placed on the table for observation of the vertebral bodies, vertebral foramina, and spinous processes of each cervical vertebra.

Evaluation guide:
(i) Target concept: Static anatomical demonstration of normative human cervical vertebral morphology for educational identification.
Minimum mechanism: Dry bone specimens (not cadaveric tissue or CT renderings) placed in fixed, non-artifactual alignment under stable illumination; no dynamic transformation or physiological simulation required.
(ii)Storyline: [Frame 1] Neutral table surface enters view → [Frames 2–5] Seven vertebrae enter static placement simultaneously or sequentially in strict left-to-right C1→C7 order → [Frames 6–10] Final static composition holds: all vertebrae fully visible, unmoving, with consistent orientation and lighting; camera remains fixed at eye-level anterior/superior angle; no motion, no zoom, no cut, only sustained observation state.

Manual:
Experimental Procedure
1. Place a complete set of seven dry, articulated cervical vertebrae (C1–C7) side-by-side in anatomical order on a neutral-colored flat table surface.
2. Orient all vertebrae in standard anatomical position: vertebral bodies facing forward, spinous processes pointing posteriorly, superior surfaces upward.
3. Ensure full visibility of vertebral bodies, vertebral foramina, and spinous processes for all seven vertebrae.
Observation of Experimental Phenomena
- Seven distinct bony elements, each with a central vertebral foramen and a posteriorly projecting spinous process.
- C1 (atlas) appears ring-shaped without a spinous process; C2 (axis) shows a cranially projecting dens; C3–C6 show bifid (split) spinous processes; C7 shows a single, long, non-bifid spinous process.
- All vertebral foramina are circular/oval and centered within their respective vertebral bodies.
Summary of Experimental Principles
Cervical vertebrae (C1–C7) share defining morphological features: transverse foramina in all, vertebral foramina forming the vertebral canal, and characteristic spinous process configurations—critical for identification, biomechanics, and clinical assessment.

Prompt Grounding rubric:
level_1: Fewer than seven distinct bony vertebrae are shown; or the objects are not recognizable as cervical vertebrae (C1-C7); or no flat table or support surface is shown beneath them; or the vertebrae are not arranged as a static display (for example, shown moving, disassembled into loose fragments, or captured mid-motion).
level_2: Seven bony structures rest on a surface, but at least one looks out of place for a cervical set (for example, an eighth, non-cervical-looking piece is included); or at least one structure is missing a feature that any cervical vertebra should show at a glance (no visible central opening, no visible posterior projection on any of the pieces meant to be C2-C7, or the topmost bone does not show the ring-and-arch shape expected of the atlas); or the central openings are not lined up within their own vertebral bodies.
level_3: Seven distinct bony pieces sit side-by-side on a flat table surface, all fully visible from an anterior or superior angle; each piece shows a vertebral body, a central opening (vertebral foramen), and a posterior bony projection (spinous process) as separate, identifiable features; no additional bones or anatomical models beyond these seven cervical pieces appear in the shot.
level_4: The seven-piece, fully visible display described above is shown, and in addition: the seven pieces run in a single consistent order from C1 to C7 (or C7 to C1) left-to-right, all with the same face toward the camera, either all anterior surfaces facing the lens, or all superior surfaces facing up, not a mix of the two; each piece's posterior projection clearly points away from its body, toward the back of the display; each piece's central opening is a rounded or oval hole sitting in the middle of its body, not off to one side.
level_5: The ordered, uniformly oriented display described above is shown, and in addition: all seven pieces look visibly distinct from their neighbors; no two look identical in outline, size, or feature layout, so a viewer could tell each one apart at a glance; no piece is rotated, overlapped, or blocked in a way that hides its body, opening, or posterior projection at any point in the shot.

Scientific and Causal Correctness rubric:
level_1: Any of the seven pieces is missing its central canal opening entirely; or a posterior bony projection points toward the front of its body instead of away from it; or two or more vertebral bodies appear fused into a single solid mass; or any piece shows a facet or notch positioned for a rib to attach, which is a thoracic-vertebra feature not found on cervical vertebrae.
level_2: One or more of the pieces meant to be C3 through C6 lacks the expected forked (bifid) tip on its posterior projection; or the topmost piece (C1) shows a posterior projection when it should have none; or the piece meant to be C7 shows a forked tip when its projection should end in a single point; or any piece from C2 through C7 is missing its posterior projection altogether.
level_3: All seven pieces show a central canal opening, and all except C1 show a posterior projection (C1 correctly shows none); the vertebral bodies are separate, distinct pieces, not fused together; none of the seven shows a rib-facet notch; all seven read as plain, matte, ivory or off-white bone, with no fluid, cartilage, or soft-tissue coloring or texture on any of them.
level_4: The separate, bone-colored, rib-facet-free set described above is shown, and in addition: the topmost piece (C1) has no posterior projection and reads as a ring shape; the second piece (C2) shows a single upward-projecting peg (the dens) rising from its body; the pieces for C3 through C6 each show a posterior projection with a visibly split, forked tip; the piece for C7 has a single, unforked posterior projection that is visibly the longest of all seven.
level_5: The five specific identities described above (C1's ring shape, C2's dens, the forked tips on C3-C6, and C7's long unforked tip) are shown, and in addition: the vertebral bodies grow gradually larger from C3 through C6, and C7's body is clearly the largest and bulkiest of the seven cervical pieces; each piece shows a pair of small openings or notches out in its side wings (transverse foramina), one on the left and one on the right; none of the seven pieces shows an irregular wedge shape, bony spurs, or a collapsed or crushed body that would suggest damage or disease rather than normal anatomy.

Spatiotemporal Consistency rubric:
level_1: One or more vertebrae appear or disappear abruptly at some point in the clip instead of being present for its full length; or the table surface's shape or texture changes abruptly partway through; or the overall lighting jumps from bright to dark, or the reverse, with no gradual change; or the camera view cuts between more than two unrelated angles.
level_2: Two or more vertebrae shift position or rotate suddenly between frames instead of staying put; or the lighting flickers noticeably more than once; or the table surface's color or texture changes partway through the clip; or a vertebra rotates far enough to hide a feature (its opening or posterior projection) that was visible moments before.
level_3: Every vertebra stays exactly where it started for the whole clip; the table surface looks the same throughout with no warping or color change; the lighting stays even and steady with no flicker; the camera angle never pans, tilts, or zooms; there is no visible jitter or dropped-frame stutter anywhere in the shot.
level_4: The fixed positions and steady lighting and camera described above hold for the whole clip, and in addition: all seven vertebrae keep the same side-by-side spacing relative to each other throughout, without any of them overlapping; no vertebra's shadow appears detached from its body or floats separately from it; no reflection on the table surface points in a direction inconsistent with where the light in the scene is coming from.
level_5: The steady arrangement and consistent shadows and reflections described above hold, and in addition: vertebrae farther from the camera look appropriately smaller than closer ones, with no flattened, same-size appearance regardless of distance; no vertebra that is closer to the camera ever appears smaller than one farther away; no vertebra appears to pass through the table surface or through a neighboring vertebra at any point in the clip.