Overview
This lecture introduces anatomical directional terms used to describe locations and positions on the human body, referencing the standardized anatomical position to avoid confusion.
Anatomical Position
- Anatomical position: person stands upright, face forward, arms at sides, palms and feet facing forward.
- All directional terms are based on the body in this standard position.
Major Directional Terms
- Superior: Toward the head or above; e.g., heart is superior to small intestine.
- Inferior: Toward the feet or below; e.g., small intestine is inferior to heart.
- Anterior (Ventral): Toward the front of the body; e.g., sternum is anterior to heart.
- Posterior (Dorsal): Toward the back; e.g., heart is posterior to sternum.
- Medial: Toward the body’s midline; e.g., heart is medial to lungs.
- Lateral: Away from the midline, toward the side; e.g., lungs are lateral to heart.
- Proximal: Closer to the trunk or axial body; e.g., thigh is proximal to foot.
- Distal: Farther from the trunk or axial body; e.g., foot is distal to thigh.
- Superficial: Closer to the surface of the body; e.g., sternum is superficial to lungs.
- Deep: Further from the surface; e.g., lungs are deep to sternum.
Views of the Body
- Anterior view: looking at the body from the front.
- Posterior view: looking at the body from the back.
- Lateral view: viewing the body from the side.
Key Terms & Definitions
- Anatomical Position — Standard body posture for reference (standing, face forward, palms forward).
- Axial Body — Head, neck, and trunk.
- Appendicular Body — Limbs attached to the axial body.
- Midline — Imaginary line dividing body into left and right halves.
Action Items / Next Steps
- Memorize and practice using all anatomical directional terms.
- Review diagrams illustrating the anatomical position and directional terms.