The phrase "axis of the head" is correct and usable in written English.
It can be used in contexts related to anatomy, biology, or discussions about orientation and positioning of the head.
Example: "In studying the anatomy of the skull, we must consider the axis of the head to understand its movement and function."
Alternatives: "center of the head" or "pivot point of the head".
The axis of the head is in line with that of the body, and the long snout is tipped with a small mouth.
The louse body is flattened dorsoventrally with the long axis of the head horizontal, enabling it to lie close along the feathers or hairs for attachment or feeding.
This is because the primary axis of the head is rotated 90° to become parallel to the primary axis of the body.
We only digitized the left premaxillary bones; images are reflected across the medial axis of the head to aid in interpretation.
When fish are oriented parallel to the long axis of the head, the body feint provides an obvious advantage by most often startling fish in the wrong direction (from the fish perspective) - toward the snake's approaching jaws (Figure 2A).
We employ only one type of action, namely setting the robot head's tilt to a value in [−1;1], and concentrate exclusively on the infra-red (IR) sensor mounted in the head of the robot and pointing along the longitudinal axis of the head.
Frontal condylar head long-axis line was drawn along the axis of the condylar head from the lateral pole to the medial pole (a, b).
Axial condylar head long-axis line was drawn along the axis of the condylar head from the lateral pole to the medial pole (a, b).
Thus, the escape of the metatarsal head causes the extensor and flexor hallucis longus to act laterally to the axis of the metatarsal head, aggravating the metatarsal varus deformity and valgus deformity of the hallux.
Hook curvature measured as the angle between the hook and the main axis of the sperm head (see Methods) varied substantially across species (range of angle: 244° 375°; Figure 2A).
Orientation towards one side was defined as the angle between the sagittal axis of the dogs' head and the center of one of the pictures, which is less than 10 degrees (looking at the picture), and the dogs' eyes fixed on that projected picture (Figure 4 and Video S1 – for annotated version see: http://www.cmdbase.org/web/guest/play/-/videoplayer/9).
