(define-theory Body-Directions (Anatomy))
(in-theory 'Body-Directions)


(DEFINE-RELATION _DISTAL (?A ?B)
 "Far from the point of attachment or origin." :DEF
 (AND (DIRECTION-PROPERTY ?A ?B) (ANATOMICAL-STRUCTURE ?A)))
(DEFINE-RELATION _FRONTAL (?A ?B)
 "Parallel to the main axis of the body and 
at the right angles to the sagittal plane."
 :DEF (AND (DIRECTION-PROPERTY ?A ?B) (ANATOMICAL-STRUCTURE ?A)))
(DEFINE-RELATION _LATERAL (?A ?B)
 "Farther from the median plane of the body." :DEF
 (AND (DIRECTION-PROPERTY ?A ?B) (ANATOMICAL-STRUCTURE ?A)))
(DEFINE-RELATION _PROXIMAL (?A ?B)
 "Next to or nearest to the point of attachment 
or origin; located toward the center of the body."
 :DEF (AND (DIRECTION-PROPERTY ?A ?B) (ANATOMICAL-STRUCTURE ?A)))
(DEFINE-RELATION _SAGITTAL (?A ?B)
 "Situated in the median plane of the body." :DEF
 (AND (DIRECTION-PROPERTY ?A ?B) (ANATOMICAL-STRUCTURE ?A)))
(DEFINE-RELATION _TRANSVERSAL (?A ?B)
 "At the right angles to the anterior-posterior 
axis of the body."
 :DEF (AND (DIRECTION-PROPERTY ?A ?B) (ANATOMICAL-STRUCTURE ?A)))
(DEFINE-CLASS ANTERIOR-MEDIAN-LINE (?SELF)
 "It divides the anterior of the body into left and 
right portions (sides)."
 :DEF (BODY-LINE ?SELF))
(DEFINE-CLASS AXILLARY-LINE (?SELF)
 "Passing through the center of the axilla.
It divides the body into an anterior and a posterior portions."
 :DEF (BODY-LINE ?SELF))
(DEFINE-CLASS BODY-LINE (?SELF)
:DEF (BODY-REGION ?SELF))
(DEFINE-CLASS BODY-PLANE (?SELF)
:DEF (BODY-REGION ?SELF))
(DEFINE-CLASS DORSOVENTRAL-AXIS (?SELF)
 "Any line perpendicular to the long axis of the body." :DEF (BODY-LINE ?SELF))
(DEFINE-CLASS FRONTAL-PLANE (?SELF)
 "Any vertical plane dividing the body into front and back 
portions."
 :DEF (VERTICAL-PLANE ?SELF))
(DEFINE-CLASS HORIZONTAL-PLANE (?SELF)
 "Any plane dividing the body into upper and lower portions,
perpendicular to the vertical plane."
 :DEF (BODY-PLANE ?SELF))
(DEFINE-CLASS TRANSVERSE-PLANE (?SELF)
 "Any plane dividing the body into upper and lower portions,
perpendicular to the vertical plane."
 :IFF-DEF (HORIZONTAL-PLANE ?SELF))
(DEFINE-CLASS LONG-AXIS-OF-THE-BODY (?SELF)
 "Passing through the neck, thorax, abdomen, and pelvis.
Around it the weights of the torso are most symmetrically distributed."
 :DEF (BODY-LINE ?SELF))
(DEFINE-CLASS MEDIAN-PLANE (?SELF)
 "The frontal plane passing through the middle of the
body."
 :DEF (FRONTAL-PLANE ?SELF))
(DEFINE-CLASS MIDCLAVICULAR-LINE (?SELF)
 "Also mamillary line. Passing through the center of 
the nipple."
 :DEF (BODY-LINE ?SELF))
(DEFINE-CLASS PARASTERNAL-LINE (?SELF)
 "Passing midway between the midclavicular line and the 
border of the sternum."
 :DEF (BODY-LINE ?SELF))
(DEFINE-CLASS POSTERIOR-MEDIAN-LINE (?SELF)
 "It divides the posterior of the body into left and 
right portions (sides)."
 :DEF (BODY-LINE ?SELF))
(DEFINE-CLASS SAGITTAL-PLANE (?SELF)
 "Any vertical plane dividing the body into left and right 
portions."
 :DEF (VERTICAL-PLANE ?SELF))
(DEFINE-CLASS SPINOUS-PLANE (?SELF)
 "A horizontal plane transecting the body at the level of
anterior superior iliac spine."
 :DEF (HORIZONTAL-PLANE ?SELF))
(DEFINE-CLASS STERNAL-LINE (?SELF)
 "Passing through the lateral border of the sternum." :DEF (BODY-LINE ?SELF))
(DEFINE-CLASS STERNOXIPHOID-PLANE (?SELF)
 "A horizontal plane transecting the body at the level of
xiphisternal joint."
 :DEF (HORIZONTAL-PLANE ?SELF))
(DEFINE-CLASS SUBCOSTAL-PLANE (?SELF)
 "A horizontal plane transecting the body at the level of
lower margin of the tenth rib."
 :DEF (HORIZONTAL-PLANE ?SELF))
(DEFINE-CLASS SUPRASTERNAL-PLANE (?SELF)
 "A horizontal plane transecting the body at the level of
jugular notch."
 :DEF (HORIZONTAL-PLANE ?SELF))
(DEFINE-CLASS THORACIC-PLANE (?SELF)
 "A horizontal plane transecting the body at the level of
the fourth intercostal space."
 :DEF (HORIZONTAL-PLANE ?SELF))
(DEFINE-CLASS TRANSPYLORIC-PLANE (?SELF)
 "A horizontal plane transecting the body at the level of
the eighth intercostal space."
 :DEF (HORIZONTAL-PLANE ?SELF))
(DEFINE-CLASS UMBILICAL-PLANE (?SELF)
 "A horizontal plane transecting the body at the level of
the umbilicus."
 :DEF (HORIZONTAL-PLANE ?SELF))
(DEFINE-CLASS VERTICAL-PLANE (?SELF)
 "Any plane dividing the body into left and right portions,
or front and back portions, perpendicular to the horizontal plane."
 :DEF (BODY-PLANE ?SELF))