Understanding Anatomical Positions and Planes, Lecture notes of Anatomy

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Planes and Positions

Most A&P courses, before delving into the good

stuff, teach positions and planes. We’ve put together a quick

guide to help you better understand them.

A description of any region or part of the body in a specific stance is called the anatomical position.

In the anatomical position, the body is upright, directly

facing the observer, feet flat and directed forward. The upper limbs are at the body’s sides with the palms facing forward.

Directional terms are words used to describe the position of one body relative to another.

Many directional terms are grouped in pairs that have

opposite meanings (ex: anterior-posterior), or are grouped

together to have combined meanings (ex: anterosuperior).

Anterior view: At or near the front of the body. Posterior view: At or near the back of the body.

Superior view: Situated toward the head and further away from the feet; the upper part of a structure.

Inferior view: Situated nearer to the feet than the head; the lower part of a structure.

Distal Farther from the origination of a structure. Proximal Nearer to the origination of a structure.

When we study the parts of the body, we also study their relativity to planes. Planes are imaginary flat surfaces that pass through parts of the body.

We also study parts of the body in sections , which are

cuts along a certain plane.

Tranverse plane: Divides the body into superior (upper) and inferior (lower) portions.

Oblique plane: Passes through a structure or the entire body at an angle.

Review and Practice

Okay, we’ve thrown a lot of terms at you over the course of

this eBook. Time to see what you remember.

Positions and directionals: Anterior: At or near the front of the body. Posterior: At or near the back of the body. Midline: Imaginary vertical line dividing the body equally. Superior: Toward the head, upper part of a structure. Inferior: Away from the head, lower part of a structure. Lateral: Farther from midline. Medial: Nearer to midline. Proximal: Nearer to the origination of a structure. Distal: Farther from the origination of a structure. Superficial: Close to the surface of the body. Deep: Away from the surface of the body. Commonly used planes: Frontal (or coronal): Divides the body into anterior (front) and posterior (back) portions. Transverse (or horizontal): Divides the body into superior (upper) and inferior (lower) portions. Sagittal: Divides the body vertically into right and left sides. Midsagittal: Divides the body vertically into equal right and left sides. Parasagittal: Divides the body vertically into unequal right and left sides. Oblique: Passes through the body at an angle.

This is a _______ view. a. posterosuperior b. anterosuperior c. superior d. midsagittal Answer: b This is a _______ view. a. frontal b. parasagittal c. midsagittal d. transverse Answer: d This is a _______ view. a. inferior back b. posteriosuperior c. posterioinferior d. midline Answer: c