Contrast rigidity with voluntary guarding
A) Rigidity and voluntary guarding are synonymous terms describing the same phenomenon.
B) Rigidity involves the involuntary stiffness of muscles, while voluntary guarding is a deliberate and conscious contraction of muscles to protect an injured area.
C) Voluntary guarding refers to the inability to move a joint, while rigidity is the intentional restriction of movement for therapeutic purposes.
D) Rigidity is a term used in psychology, whereas voluntary guarding is a concept in biomechanics and anatomy.