Body planes are imaginary lines dividing the body into sections. They are used to describe locations or movements.
Sagittal Plane
Divides the body into left and right sections.
Midsagittal: Equal halves.
Parasagittal: Unequal sections.
Movements: Forward and backward (e.g., flexion, extension).
Frontal (Coronal) Plane
Divides the body into front (anterior) and back (posterior) sections.
Movements: Side-to-side (e.g., abduction, adduction).
Transverse (Horizontal) Plane
Divides the body into top (superior) and bottom (inferior) sections.
Movements: Rotational (e.g., internal and external rotation).
Describes the way joints and muscles move the body:
Flexion and Extension
Flexion: Decreases the angle between two body parts (e.g., bending the elbow).
Extension: Increases the angle (e.g., straightening the knee).
Abduction and Adduction
Abduction: Movement away from the midline (e.g., raising arms laterally).
Adduction: Movement toward the midline (e.g., lowering arms back).
Rotation
Internal (Medial) Rotation: Turning toward the body’s midline.
External (Lateral) Rotation: Turning away from the midline.
Circumduction
A circular movement that combines flexion, extension, abduction, and adduction (e.g., arm circles).
Pronation and Supination
Pronation: Turning the palm downward.
Supination: Turning the palm upward.
Elevation and Depression
Elevation: Lifting a body part (e.g., shrugging shoulders).
Depression: Lowering a body part.
Protraction and Retraction
Protraction: Moving a part forward (e.g., jutting the jaw).
Retraction: Pulling a part backward.
Dorsiflexion and Plantarflexion
Dorsiflexion: Bending the foot upward.
Plantarflexion: Pointing the foot downward.
Inversion and Eversion
Inversion: Turning the sole of the foot inward.
Eversion: Turning the sole of the foot outward.