median plane

(redirected from planum medianum)
Also found in: Dictionary.

plane

 [plān]
1. a flat surface determined by the position of three points in space.
2. an imaginary flat surface that divides the body into sections (see accompanying figure). adj., adj pla´nar.
3. a specified level, as the plane of anesthesia.
4. to rub away or abrade; see also planing and plastic surgery.
5. a superficial incision in the wall of a cavity or between tissue layers, especially in plastic surgery, made so that the precise point of entry into the cavity or between the layers can be determined.
Planes of section. Transverse, sagittal, and frontal planes of the body. From Applegate, 2000.
coronal p's frontal p's.
datum plane a given horizontal plane from which craniometric measurements are made.
frontal p's those planes passing longitudinally through the body, an organ, or a part, at right angles to the median plane and dividing into front and back portions. Called also coronal planes.
horizontal plane transverse plane.
median plane one passing longitudinally through the body, an organ, or a part from front to back, dividing it into right and left halves.
sagittal p's vertical planes through the body parallel to the median plane or the sagittal suture, dividing the body into unequal left and right portions.
transverse plane one passing horizontally through the body, an organ, or a part at right angles to the median and frontal planes, dividing it into upper and lower portions. Called also horizontal plane.
vertical plane one perpendicular to a horizontal plane, such as a sagittal plane, median plane, or frontal plane.

me·di·an plane

[TA]
a plane vertical in the anatomic position, through the midline of the body that divides the body into right and left halves.
See also: Addison clinical planes.
Synonym(s): planum medianum [TA]

median plane

n.
A plane dividing a bilaterally symmetrical animal into right and left halves.

median plane

a vertical plane that divides the body into right and left halves and passes approximately through the sagittal suture of the skull. Also called cardinal sagittal plane, midsagittal plane. Compare frontal plane, sagittal plane, transverse plane.

median plane

The sagittal plane that divides the body into right and left, and which courses from the tip of the nose, chin, laryngeal prominence (Adam's apple), umbilicus and pubic symphysis.

me·di·an plane

(mē'dē-ăn plān) [TA]
A vertical plane through the midline of the body that divides the body into right and left halves.
Synonym(s): midsagittal plane.

median plane

The vertical plane that divides the body into right and left halves.

cardinal planes of the body

frontal (coronal), sagittal (median) and horizontal (transverse) planes of the body, each of which is oriented on the three planes of space
  • coronal/frontal plane plane equally dividing anterior and posterior aspects; it lies at right angles to sagittal and horizontal planes

  • horizontal/transverse plane plane parallel to the ground or horizontal surface; equally dividing superior and inferior areas; it lies at right angles to both sagittal and frontal planes

  • sagittal/median plane plane equally dividing left and right sides; it lies at right angles to both transverse and frontal planes

me·di·an plane

(mē'dē-ăn plān) [TA]
A plane vertical in the anatomic position, through the midline of the body that divides the body into right and left halves.

plane

1. a flat surface determined by the position of three points in space.
2. a specified level, as the plane of anesthesia.
3. to rub away or abrade. See also planing and plastic surgery.
4. a superficial incision in the wall of a cavity or between tissue layers, especially in plastic surgery, made so that the precise point of entry into the cavity or between the layers can be determined.

coronal plane
frontal plane, an ambiguous term when applied to quadrupeds and bipeds.
dorsal plane
any plane passing longitudinally through the body from side to side, at right angles to the median plane and dividing the body into dorsal and ventral parts. Called also coronal plane, frontal plane.
horizontal plane
one passing through the body at right angles to the median plane, and dividing the body into upper and lower parts.
inclined plane
an intraoral acrylic or metal appliance used in orthodontics to guide a tooth into a new position by using pressure applied when the mouth is closed normally. Commonest use is to move canines laterally.
median plane
one passing longitudinally through the body from front to back and dividing it into right and left halves.
nasal plane
the space between the nostrils.
nasolabial plane
the extension of the nasal plane between the nostrils into the upper lip in cattle.
nuchal plane
the flat surface at the back of the occipital bone below the nuchal crest.
rostral plane
the bare area on the dorsum of the snout of the pig.
sagittal plane
a vertical plane through the body parallel to the median plane (or to the sagittal suture) and dividing the body into left and right portions.
transverse plane
one passing through the body, at right angles to the sagittal and dorsal planes, and dividing the body into cranial and caudal portions.
vertical plane
one perpendicular to a horizontal plane, dividing the body into left and right, or front and back portions.