Domain: Healthcare — Anthropotomy
Target concept: Morphology and Structure of the Humerus

Video generation prompt: A set of humeral specimens is placed on the table for observation of their overall morphology, structures at both ends, and major bony landmarks.

Evaluation guide:
(i) Target concept: Static macroscopic anatomical verification of normal adult humeral morphology through comparative side-by-side observation.
Minimum mechanism: Specimens must be intact, dry, unarticulated, skeletally mature human humeri; table must provide stable horizontal reference plane; lighting must enable unobstructed landmark visibility without optical distortion.
(ii)Storyline: Frame 1–3: Table surface enters view; ≥2 humeri enter static position side-by-side in anatomical orientation. Frame 4–8: Full frontal still shot holds consistent viewpoint: all specimens fully in frame, both ends visible, no motion. Frame 9–10: Sustained clarity: bony landmarks remain unoccluded and anatomically congruent. Perspective constraint: Fixed frontal orthographic-like view (no parallax, no oblique angle); visibility constraint: No specimen overlap, no casting shadow over landmarks, no glare obscuring tubercles or epicondyles.

Manual:
Experimental Procedure
1. Place ≥2 dry, intact adult human humeri side-by-side on a clean, neutral-colored table in anatomical position (proximal ends left, distal ends right, shafts horizontal).
2. Ensure full frontal view showing both proximal and distal ends clearly.
3. Maintain static composition for observation.
Observation of Experimental Phenomena
- Proximal end: spherical head, greater and lesser tubercles separated by intertubercular groove, surgical neck below.
- Distal end: medial trochlea (spool-shaped) and lateral capitulum (rounded), medial epicondyle larger/more distal than lateral epicondyle, olecranon fossa visible posteriorly.
- Shaft: gently curved anteriorly, cylindrical mid-portion, cortical surface texture visible.
Summary of Experimental Principles
The humerus is the sole bone of the upper arm; its morphology reflects function: proximal head enables shoulder rotation, distal condyles articulate with forearm bones; bony landmarks serve as muscle attachment sites and joint guides.

Prompt Grounding rubric:
level_1: No humerus specimens appear; no table surface is shown; there's no arrangement of multiple specimens; nothing indicates a deliberate observation setup.
level_2: At least one bone-like object appears, but it doesn't read as a humerus (too short, missing the rounded proximal head or the distal trochlea/capitulum, no shaft curve); or only one specimen is shown without a second one beside it; or there's no table at all.
level_3: Two or more human long bones sit on a flat horizontal surface in a static frontal view; at least one clearly reads as a humerus (long shaft, rounded proximal end, distinct distal condyles), but not all specimens show both ends clearly in a consistent orientation, or major landmarks are missing from view (no visible greater tubercle, medial epicondyle, or olecranon fossa on any specimen).
level_4: Multiple humerus specimens sit side by side on a table in matching orientation (shafts horizontal, proximal ends aligned with each other, distal ends aligned with each other); both ends of every specimen are fully visible; the greater tubercle, surgical neck, medial and lateral epicondyles, trochlea, and capitulum are all structurally present and identifiable, but one landmark is partly blocked from view, or one specimen is rotated so its medial epicondyle doesn't face the camera.
level_5: Two or more intact, dry, unarticulated adult humeri sit side by side on a plain table in identical orientation (proximal ends left, distal ends right, shafts horizontal); both ends of every specimen are completely unobstructed; all nine major bony landmarks (greater tubercle, lesser tubercle, intertubercular groove, surgical neck, medial epicondyle, lateral epicondyle, trochlea, capitulum, and olecranon fossa) are fully exposed, correctly proportioned, and shaped consistently across every specimen.

Scientific and Causal Correctness rubric:
level_1: What's shown contradicts basic human skeletal anatomy: a specimen looks segmented into pieces, fused to another bone, textured like cartilage, or shaped with an obvious deformity rather than normal bone.
level_2: At least one specimen gets a core structural relationship wrong: the trochlea and capitulum are shown merged into one rounded condyle instead of two distinct shapes; the medial epicondyle is missing or sits on the wrong (lateral) side; the greater tubercle looks smaller than the lesser tubercle; or the shaft is perfectly straight instead of showing its natural forward curve.
level_3: Every specimen shows the correct proximal-to-distal layout and the basic humeral parts (rounded head, anatomical neck, surgical neck, shaft, distal condyles), but at least one landmark is flipped to the wrong side (e.g., a medial epicondyle sitting laterally), or one of the two distal condyles is shown symmetric instead of its normal asymmetric shape.
level_4: Every specimen keeps correct proportions and relative positions among its landmarks: the trochlea sits medially and looks spool-shaped, the capitulum sits laterally and looks rounded, the medial epicondyle projects further down than the lateral epicondyle, and the greater tubercle sits lateral and superior to the lesser tubercle, but one specimen shows a mismatch between its own left/right landmark prominence, or a subtle bend in the shaft that doesn't match the others.
level_5: Every specimen shows full anatomical fidelity: the proximal end has a clearly rounded head, an anatomical neck, and greater/lesser tubercles separated by a visible intertubercular groove; the distal end shows the medial trochlea and lateral capitulum in their correct shapes; the medial epicondyle is larger and sits more distally than the lateral epicondyle; the olecranon fossa is visible from the back; each shaft shows a gentle forward bow; and all of these features look consistent and proportionally matched across every specimen shown.

Spatiotemporal Consistency rubric:
level_1: Objects jump to new positions between frames with no motion connecting them; the table surface appears or disappears abruptly; a specimen flickers, vanishes, or visibly changes shape mid-sequence; the room's brightness or color cast suddenly switches between one frame and the next; the camera cuts or spins with no continuous motion to explain it.
level_2: At least one specimen shifts position or rotates with no visible cause (e.g., sliding sideways without anything touching it); the table's edge warps or gets cropped inconsistently between frames; a specimen's shadow detaches from it or points a different way than the light source would suggest; background elements flicker, blink, or change size erratically.
level_3: Every specimen stays exactly where it started for the whole clip; the table stays fully visible and flat; no specimen disappears, reappears, or changes shape; the lighting stays steady, but a small flaw remains, such as a faint frame-to-frame wobble along a specimen's edge or the table's contour, or one specimen's shadow not quite matching the angle of the light source.
level_4: No specimen drifts, deforms, or has its lighting change; every specimen keeps its pose and its position relative to the others (side by side, same plane, same orientation); shadows consistently fall opposite the light source and match each specimen's outline, but one frame shows a brief soft blur along a specimen's edge during the otherwise-still hold.
level_5: Nothing drifts, deforms, blurs, or flickers anywhere in the clip; every specimen and the table keep the exact same shape and position from the first frame to the last, with no visible warping; the side-by-side, same-plane, frontal arrangement never changes; the lighting stays even and physically plausible throughout, with no hot spot, flare, or shift in direction.