When an overactive muscle decreases neural drive to its functional antagonist, this is called?

• A. Altered reciprocal inhibition
• B. Postural distortion patterns
• C. Upper crossed syndrome
• D. Pronation distortion syndrome

Answer: (A)

Reciprocal inhibition is the normal neural process where the contraction of one muscle leads to inhibition of its antagonist, allowing smooth, coordinated movement. When an overactive muscle suppresses the neural drive to its functional antagonist beyond the normal level, the system is not functioning normally in this paired relationship—that abnormal interaction is called altered reciprocal inhibition. This concept explains why, in a pattern of muscle imbalance, the antagonist becomes underactive even though the problem isn’t a primary weakness of the antagonist itself. The other options describe broader postural patterns or syndrome classifications rather than the specific neural interaction between a muscle and its antagonist, so they don’t fit this scenario as precisely.