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Gross Anatomy
Directional Terms and Body Planes
| Concept | Definition |
|---|---|
| Superior | Situated above (used sparingly in veterinary medicine for some structures of the head) |
| Inferior | Situated below (used sparingly in veterinary medicine for some structures of the head) |
| manus | forelimb |
| pes | hindlimb |
| Pronation | Lateral rotation of manus or pes so that palmar or plantar surface transitions from upward facing (facing the sky), to downward facing (facing the ground) |
| Supination | Medial rotation of manus or pes so that palmar or plantar surface transitions from downward facing (facing the ground), to upward (facing the sky) |
| Median or Midsagittal | A plane that divides the body equal into right and left halves along a longitudinal line. |
| Paramedian or Sagittal | A plane that divides the body into unequal right and left halves along a longitudinal line. |
| Transverse | A plane separating the trunk of the body or the limbs, running perpendicular to the long axis of the trunk, tail or limbs (front half from back half) |
| Ipsilateral | on same side of body |
| contralateral | opposite side of body |
| Axis | a longitudinal line bisecting the limb; passes between digits III and IV |
| Axial | describes a point near the axis of the limb |
| Abaxial | refers to a point away from the axis of the limb |
| (T/F) Axial and Abaxial are terms used only for the | True |
| adduction | the movement of a body part toward the midline of the body |
| abduction | the movement of a limb or body part away from the midline of the body |
| raphe | seam-like union where two lateral (symmetrical) halves of a body part or organ merge |
| ramus | refers to a projecting part, elongated process, or branch of a bone, nerve, or blood vessel |
| rete | an anatomical network of intersecting blood vessels, nerve fibers, or tubular structures |
| cleido- | refers to the clavicle (collarbone) |
| omo- | pertains to the shoulder or scapula |
| supra- | "above," "over," or "beyond" |
| infra- | "below" or "beneath" |
| epi- | "on," "upon," "over," or "outer" |